SLLSEW5 April 2017 TUSB8044
PRODUCTION DATA.
- 1 Features
- 2 Applications
- 3 Description
- 4 Revision History
- 5 Description (Continued)
- 6 Pin Configuration and Functions
- 7 Specifications
-
8 Detailed Description
- 8.1 Overview
- 8.2 Functional Block Diagram
- 8.3
Feature Description
- 8.3.1 Battery Charging Features
- 8.3.2 USB Power Management
- 8.3.3 I2C Programming Support Using Internal Hid to I2C Interface
- 8.3.4 USB2.0 Billboard
- 8.3.5 One Time Programmable (OTP) Configuration
- 8.3.6 Clock Generation
- 8.3.7 Crystal Requirements
- 8.3.8 Input Clock Requirements
- 8.3.9 Power-Up and Reset
- 8.4 Device Functional Modes
- 8.5
Register Maps
- 8.5.1 Configuration Registers
- 8.5.2 ROM Signature Register
- 8.5.3 Vendor ID LSB Register
- 8.5.4 Vendor ID MSB Register
- 8.5.5 Product ID LSB Register
- 8.5.6 Product ID MSB Register
- 8.5.7 Device Configuration Register
- 8.5.8 Battery Charging Support Register
- 8.5.9 Device Removable Configuration Register
- 8.5.10 Port Used Configuration Register
- 8.5.11 Device Configuration Register 2
- 8.5.12 USB 2.0 Port Polarity Control Register
- 8.5.13 UUID Registers
- 8.5.14 Language ID LSB Register
- 8.5.15 Language ID MSB Register
- 8.5.16 Serial Number String Length Register
- 8.5.17 Manufacturer String Length Register
- 8.5.18 Product String Length Register
- 8.5.19 Device Configuration Register 3
- 8.5.20 USB 2.0 Only Port Register
- 8.5.21 Billboard SVID LSB
- 8.5.22 Billboard SVID MSB
- 8.5.23 Billboard PID LSB
- 8.5.24 Billboard PID MSB
- 8.5.25 Billboard Configuration
- 8.5.26 Billboard String1 Length
- 8.5.27 Billboard String2 Length
- 8.5.28 Serial Number String Registers
- 8.5.29 Manufacturer String Registers
- 8.5.30 Product String Registers
- 8.5.31 Additional Feature Configuration Register
- 8.5.32 SMBus Device Status and Command Register
- 8.5.33 Billboard String1_2
-
9 Applications and Implementation
- 9.1 Application Information
- 9.2
Typical Application
- 9.2.1
Discrete USB Hub Product
- 9.2.1.1 Design Requirements
- 9.2.1.2
Detailed Design Procedure
- 9.2.1.2.1 Upstream Port Implementation
- 9.2.1.2.2 Downstream Port 1 Implementation
- 9.2.1.2.3 Downstream Port 2 Implementation
- 9.2.1.2.4 Downstream Port 3 Implementation
- 9.2.1.2.5 Downstream Port 4 Implementation
- 9.2.1.2.6 VBUS Power Switch Implementation
- 9.2.1.2.7 PD Controller and EEPROM Implementation
- 9.2.1.2.8 DisplayPort Implementation
- 9.2.1.2.9 Clock, Reset, and Misc
- 9.2.1.2.10 TUSB8044 Power Implementation
- 9.2.1.3 Application Curves
- 9.2.1
Discrete USB Hub Product
- 10Power Supply Recommendations
- 11Layout
- 12Device and Documentation Support
- 13Mechanical, Packaging, and Orderable Information
Package Options
Refer to the PDF data sheet for device specific package drawings
Mechanical Data (Package|Pins)
- RGC|64
Thermal pad, mechanical data (Package|Pins)
Orderable Information
8 Detailed Description
8.1 Overview
The TUSB8044 is a four-port USB 3.1 Gen1 compliant hub. It provides simultaneous SuperSpeed USB and high-speed/full-speed connections on the upstream port and provides SuperSpeed USB, high-speed, full-speed, or low-speed connections on the downstream ports. When the upstream port is connected to an electrical environment that only supports high-speed or full-speed/low-speed connections, SuperSpeed USB connectivity is disabled on the downstream ports. When the upstream port is connected to an electrical environment that only supports full-speed/low-speed connections, SuperSpeed USB and high-speed connectivity are disabled on the downstream ports.
8.2 Functional Block Diagram
8.3 Feature Description
8.3.1 Battery Charging Features
The TUSB8044 provides support for USB Battery Charging (BC1.2) and custom charging. Battery charging support may be enabled on a per port basis through the REG_6h(batEn[3:0]).
USB Battery charging support includes both Charging Downstream Port (CDP) and Dedicated Charging Port (DCP) modes. The DCP mode is compliant with the Chinese Telecommunications Industry Standard YD/T 1591-2009. CDP is enabled when the upstream port has detected valid VBUS, configured, and host sets port power. When the upstream port is not connected and battery charging support is enabled, the TUSB8044 will enable DCP mode.
In addition to USB Battery charging (BC1.2), the TUSB8044 supports custom charging indications: Divider Charging (ACP3, ACP2, ACP1 modes), and Galaxy compatible charging. These custom charging modes are only supported when upstream port is unconnected and AUTOMODE is enabled. When in AUTOMODE and upstream port is disconnected, the port will automatically transition from ACP mode to the DCP mode depending on the portable device connected. The divided mode places a fixed DC voltage on the ports DP and DM signals which allows some devices to identify the capabilities of the charger. The default divider mode indicates support for up to 10W (ACP3). The divider mode can be configured to report a lower-current setting (up to 5 W) through REG_0Ah (HiCurAcpModeEn).
When the upstream port is not connected and battery charging support is enabled for a port, the TUSB8044 drives the port power enable active. If AUTOMODE is disabled, then DCP mode is used. If AUTOMODE is enabled and FullAutoEn bit is cleared (Reg_25h Bit 0), then TUSB8044 will start with highest enabled divider current mode (ACPx). The TUSB8044 will remain in highest current mode as long as a pull-up is not detected on DP pin. If an pull-up is detected on DP pin, then TUSB8044 will drive the port power enable inactive and switch to Galaxy mode, if enabled, or to DCP mode if Galaxy mode is disabled. The TUSB8044 will again drive the port power enable active. The TUSB8044 will remain in Galaxy mode as long as no pull-up is detected on DP pin. If an pull-up is detected on DP pin, then TUSB8044 will drive the port power enable inactive and transition to DCP mode. The TUSB8044 will again drive the port power enable active. In DCP mode, the TUSB8044 will look for a pull-up detected on DP pin or RxVdat. If a pull-up or RxVdat is detected on DP, the TUSB8044 will remain in DCP mode. If no pull-up or RxVdat is detected on DP pin after 2 seconds, the TUSB8044 will drive the port power enable inactive and transition back to ACPx mode. This sequence will repeat until upstream port is connected.
When Automatic mode is enabled and full automatic mode (FullAutoEn Reg_25h bit 0) is enabled, TUSB8044 will perform same sequence described in previous paragraph with the addition of attempting all supported ACPx modes before sequencing to Galaxy Mode (if enabled) or DCP mode.
The supported battery charging modes when TUSB8044 configured for SMBus or external EEPROM is detailed in Battery Charging Modes with SMBus/EEPROM Table.
The supported battery charging modes when TUSB8044 configured for I2C but without an external EEPROM is determined by the sampled state of the pins. These modes are detailed in Battery Charging Modes without EEPROM Table.
Table 1. TUSB8044 Battery Charging Modes with SMBus or I2C EEPROM
| batEn[n] Reg_06h Bits 3:0 | Upstream VBUS | HiCurAcpMode En Reg_0Ah Bit 4 | autoModeEnz Reg_0Ah Bit 1 | FullAutoEn Reg_25h Bit 0 | Galaxy_Enz Reg_25h Bit 1 | Battery Charging Mode Port x (x = n + 1) |
|---|---|---|---|---|---|---|
| 0 | Don’t Care | Don't Care | Don’t Care | Don't Care | Don't Care | No Charging support |
| 1 | > 4V | Don't Care | Don't Care | Don't Care | Don't Care | CDP |
| 1 | < 4V | Don't Care | 1 | Don't Care | Don't Care | DCP |
| 1 | < 4V | 0 | 0 | 1 | 1 | AUTOMODE enabled. Sequences through all ACPx modes and DCP with the exception of ACP3 Alternate ACP2, ACP1, DCP |
| 1 | < 4V | 1 | 0 | 1 | 1 | AUTOMODE enabled. Sequences through all ACPx modes and DCP. Alternate ACP3, ACP2, ACP1, DCP |
| 1 | < 4 V | 0 | 0 | 0 | 1 | AUTOMODE enabled. Sequences between ACP2 and DCP. Alternate ACP2, DCP |
| 1 | < 4V | 1 | 0 | 0 | 1 | AUTOMODE enabled. Sequences between ACP3 and DCP. Alternate ACP3, DCP |
| 1 | < 4V | 0 | 0 | 1 | 0 | AUTOMODE enabled with Galaxy compatible charging support. Alternate ACP2, ACP1, Galaxy, DCP. |
| 1 | < 4V | 1 | 0 | 1 | 0 | AUTOMODE enabled with Galaxy compatible charging support. Alternate ACP3, ACP2, ACP1, Galaxy, DCP |
| 1 | < 4V | 0 | 0 | 0 | 0 | AUTOMODE enabled with Galaxy compatible charging support. Alternate ACP2, Galaxy, DCP |
| 1 | < 4V | 1 | 0 | 0 | 0 | AUTOMODE enabled with Galaxy compatible charging support. Alternate ACP3, Galaxy, DCP |
Table 2. TUSB8044 Battery Charging Modes I2C Mode without EEPROM
| BATEN[3:0] pins | Upstream VBUS | Galaxy_Enz OTP | Battery Charging Mode Port x (x = n + 1) |
|---|---|---|---|
| 0 | Don’t Care | Don’t Care | No Charging support |
| 1 | > 4V | Don't Care | CDP |
| 1 | < 4V | 0 | AUTOMODE enabled with Galaxy compatible charging support. Sequences through all ACPx modes. Alternate ACP3, ACP2, ACP1, Galaxy, DCP. |
| 1 | < 4V | 1 | AUTOMODE enabled. Sequences through all ACPx modes. Alternate ACP3, ACP2, ACP1, DCP. |
8.3.2 USB Power Management
The TUSB8044 can be configured for power switched applications using either per-port (Full power managed) or ganged power-enable controls and over-current status inputs. When battery charge is enabled, the TUSB8044 will always function in full power managed.
Power switch support is enabled by REG_5h (fullPwrMgmtz) and the per-port or ganged mode is configured by REG_5h(ganged).
The TUSB8044 supports both active high and active low power-enable controls. The PWRCTL[4:1] polarity is configured by REG_Ah(pwrctlPol).
8.3.3 I2C Programming Support Using Internal Hid to I2C Interface
The TUSB8044 I2C programming mode is supported using class-specific requests through the HID interface. The HID's embedded port will be numbered 1 greater than the highest numbered exposed port. The internal HID to I2C function of the TUSB8044 does not have an interrupt OUT endpoint. The TUSB8044 supports GET REPORT (Input) through the HID interrupt and control endpoints. The GET REPORT (Feature) and SET REPORT (Output) occurs through the control endpoint.
Table 3. HID Requests I2C Programming Support
| COMMAND | bmRequestType | bRequest | wValue | wIndex | wLength | DATA |
|---|---|---|---|---|---|---|
| Setup field Offset | Offset = 0 | Offset = 1 | Offset = 2 | Offset = 4 | Offset = 6 | N/A |
| GET REPORT | A1H | 01H | 0100H – input 0300H - feature |
0000H | Report Length | Report |
| SET REPORT | 21H | 09H | 0200H – output | 0000H | Report Length | Report |
Other HID class specific requests are optional and not supported (SET IDLE, SET PROTOCOL, GET IDLE, GET PROTOCOL) . Also report IDs are not required since all requests are not interleaved.
8.3.3.1 SET REPORT (Output)
Report length includes overhead bytes (1 byte of opcode, 1 byte of device address and 2 bytes of data length) and must match the number of bytes sent in the data stage or the request will be stalled.
- 1-byte opcode
- 0x01 read I2C
- 0x02 write I2C with stop
- 0x03 write I2C without stop (use to set sub-address prior to read)
- 1-byte I2C slave (7-bit) address
- 2-byte I2C transaction data length
- "length" bytes of Data for a write, but none for a read.
Set Report status stage reports only the status of the receipt and validity of the request, not the status of the I2C transaction. As long as the fields construct a valid request, the status stage will be Acked by a null packet. Otherwise, it will be STALLed. For example, if the report_length is longer than the amount of data sent before the status stage or the wLength is greater than the number of bytes of data sent in the data stage, the status stage will be STALLed. If the number of bytes sent in the data stage is greater than wLength or report_length, the data stage will be STALLED.
Software shall ensure properly formatted commands and data responses. The sum of the start address and wLength shall be less than the total size of the address range of the target device in a properly formatted command. Hardware shall wrap any data addresses above FFFFh and shall discard any data transmitted greater than wLength and return STALL. A STALL will also be returned if opcode is 00h.
The I2C master that performs the I2C reads and writes initiated through USB HID interface supports clock stretching. It operates at 400 kHz by default, but can be configured for 100 kHz through eFuse or register.
If the TUSB8044 is suspended (L2) by the USB host, the USB HID interface must enter suspend, but the I2C master shall remain active while attempting to complete an active I2C write request. An active I2C read request may be aborted if the TUSB8044 enters USB suspend state. Per the USB specification, the USB host should not suspend the HID interface while an I2C read or write is still in progress. The USB HID interface shall refuse requests to enter USB 2.0 sleep mode (L1) while an I2C read or write is in progress.
8.3.3.2 GET REPORT (Feature)
This HID Report will always return a 2-byte constant (0x82FF) which can be used to identify compatible HID devices even if the customer changes the VID/PID.
8.3.3.3 GET REPORT (Input)
A report length of one reports the status byte only. To receive a report with data, the report length must be the length of the data, plus one byte for status and two bytes for the length field.
- 1-byte Status
- 0 Success
- 1 Fail — timeout (35 ms)
- 2 Fail — Address nak
- 3 Fail — data nak
- 2-byte length
- "length" bytes of Data for a read, but not for a write or a feature report.
A Get Report (input) request is required for both read and write. The interrupt endpoint will NAK until the I2C transaction is complete, so that it can report length, data for a read, and final status.
8.3.4 USB2.0 Billboard
Integrated in the TUSB8044 is a USB2.0 Billboard device which complies to the “USB Device Class Definition for Billboard Devices Version 1.1” specification. The billboard device is attached to the highest number downstream port of TUSB8044 USB2.0 hub. The purpose of the billboard is to communicate Alternate Mode status to the host system. The TUSB8044 supports only one Alternate Mode.
There are three pins, typically controlled by a USB Power Deliver (USB PD) controller, used to configure TUSB8044 Billboard functionality: BBEN, BBbmConfigured0, and BBbmConfigured1. The pins are only used when I2C mode is selected. If SMBus mode is selected, then TUSB8044 registers are used instead.
BBEN controls whether or not Billboard is presented to the Host system. When BBEN pin is high, the Billboard is presented to the Host system.
BBbmConfigured[1:0] pins map directly to the bmConfigured fields in the Billboard Capability Descriptor. These two pins must be set to reflect the Alternate Mode status before BBEN is asserted high. If Alternate Mode status changes after BBEN is high, BBEN must be transitioned low, BBbmConfigured[1:0] pins updated to reflect new status, and then BBEN asserted high. For cases in which USB PD controller only has one available GPIO to control TUSB8044 Billboard functionality, BBbmConfigured[1:0] pins should be tied to GND and BBEN pin must be asserted when an Alternate Mode failure occurs.
The TUSB8044 billboard capability descriptor fields can be changed using an external EEPROM. At power-up, the unique billboard fields from external EEPROM are loaded into TUSB8044 billboard. Fields controlled by EEPROM are described in Table 4. When an EEPROM is not used, the TUSB8044’s default values as indicated in Table 4 is used.
Table 4. EEPROM Billboard Capability Descriptor Map
| SIZE | I2C EEPROM ADDRESS | TUSB8044 DEFAULT WHEN EEPROM NOT USED | DESCRIPTION |
|---|---|---|---|
| 2-bytes | 0x28,0x27 | 0xFF01 (DisplayPort) | SVID. |
| 2-bytes | 0x2A,0x29 | 0x82EE | Billboard PID. Billboard and hub will share the same VID. |
| 1-byte | 0x2B | 0x80 | Billboard Configuration. When EEPROM used, this field must be set to 0x80. |
| 1-byte | 0x2C | 0 = use default string in ROM | BBString1Len. # of Unicode characters (2 bytes each) in string 1. BBString1Len size + BBString2Len size must be <= 480 bytes, or < 480 if # characters in string 1 is odd, because string 2 must start on an address that is a multiple of 4 (bytes). |
| 1-byte | 0x2D | 0 = use default string in ROM | BBString2Len. # of Unicode characters (2 bytes each) in string 2. |
| 480 bytes | 0x100 | http://www.displayport.org | String 1. AdditionalInfoURL – required string descriptor providing a URL where the user can go to get more detailed information about the product and the various Alternate Modes it supports. |
| “DisplayPort” | String 2. AlternateModeString – optional string to describe the alternate mode, which may include a URL. From Billboard spec, An example string is DisplayPort to VGA adapter. For further assistance, see http://help.vesa.org/dp-usb-type-c/. |
8.3.5 One Time Programmable (OTP) Configuration
The TUSB8044 allows device configuration through one time programmable non-volatile memory (OTP). The programming of the OTP is supported using vendor-defined USB device requests. For details using the OTP features please contact your TI representative.
Table 5 provides a list features which may be configured using the OTP.
Table 5. OTP Configurable Features
| CONFIGURATION REGISTER OFFSET | BIT FIELD | DESCRIPTION |
|---|---|---|
| REG_01h | [7:0] | Vendor ID LSB |
| REG_02h | [7:0] | Vendor ID MSB |
| REG_03h | [7:0] | Product ID LSB |
| REG_04h | [7:0] | Product ID MSB |
| REG_07h | [0] | Port removable configuration for downstream ports 1. OTP configuration is inverse of rmbl[3:0], i.e. 1 = not removable, 0 = removable. |
| REG_07h | [1] | Port removable configuration for downstream ports 2. OTP configuration is inverse of rmbl[3:0], i.e. 1 = not removable, 0 = removable. |
| REG_07h | [2] | Port removable configuration for downstream ports 3. OTP configuration is inverse of rmbl[3:0], i.e. 1 = not removable, 0 = removable. |
| REG_07h | [3] | Port removable configuration for downstream ports 4. OTP configuration is inverse of rmbl[3:0], i.e. 1 = not removable, 0 = removable. |
| REG_08h | [3:0] | Port used Configured register. |
| REG_0Ah | [3] | Enable Device Attach Detection.. |
| REG_0Ah | [4] | High-current divider mode enable. |
| REG_0Bh | [0] | USB 2.0 port polarity configuration for downstream ports 1. |
| REG_0Bh | [1] | USB 2.0 port polarity configuration for downstream ports 2. |
| REG_0Bh | [2] | USB 2.0 port polarity configuration for downstream ports 3. |
| REG_0Bh | [3] | USB 2.0 port polarity configuration for downstream ports 4. |
| REG_25h | [4:0] | Device Configuration Register 3 |
| REG_26h | [3:0] | USB2.0 Only Port Register |
| REG_F0h | [3:1] | USB power switch power-on delay. |
8.3.6 Clock Generation
The TUSB8044 accepts a crystal input to drive an internal oscillator or an external clock source. If a clock is provided to XI instead of a crystal, XO is left open. Otherwise, if a crystal is used, the connection needs to follow the guidelines below. Since XI and XO are coupled to other leads and supplies on the PCB, it is important to keep them as short as possible and away from any switching leads. It is also recommended to minimize the capacitance between XI and XO. This can be accomplished by shielding C1 and C2 with the clean ground lines.
Figure 2. TUSB8044 Clock
8.3.7 Crystal Requirements
The crystal must be fundamental mode with load capacitance of 12 pF - 24 pF and frequency stability rating of ±100 PPM or better. To ensure proper startup oscillation condition, a maximum crystal equivalent series resistance (ESR) of 50 Ω is recommended. A parallel load capacitor should be used if a crystal source is used. The exact load capacitance value used depends on the crystal vendor. Refer to application note Selection and Specification for Crystals for Texas Instruments USB2.0 devices (SLLA122) for details on how to determine the load capacitance value.
8.3.8 Input Clock Requirements
When using an external clock source such as an oscillator, the reference clock should have a ±100 PPM or better frequency stability and have less than 50-ps absolute peak to peak jitter or less than 25-ps peak to peak jitter after applying the USB 3.1 jitter transfer function. XI should be tied to the 1.8-V clock source and XO should be left floating.
8.3.9 Power-Up and Reset
The TUSB8044 does not have specific power sequencing requirements with respect to the core power (VDD) or I/O and analog power (VDD33) as long as GRSTz is held in an asserted state while supplies ramp. The core power (VDD) or I/O power (VDD33) may be powered up for an indefinite period of time while the other is not powered up if all of these constraints are met:
- All maximum ratings and recommended operating conditions are observed.
- All warnings about exposure to maximum rated and recommended conditions are observed, particularly junction temperature. These apply to power transitions as well as normal operation.
- Bus contention while VDD33 is powered up must be limited to 100 hours over the projected life-time of the device.
- Bus contention while VDD33 is powered down may violate the absolute maximum ratings.
A supply bus is powered up when the voltage is within the recommended operating range. It is powered down when it is below that range, either stable or in transition.
A minimum reset duration of 3 ms is required. This is defined as the time when the power supplies are in the recommended operating range to the de-assertion of GRSTz. This can be generated using programmable-delay supervisory device or using an RC circuit. When a RC circuit is used, the external capacitor size chosen must be large enough to meet the 3ms minimum duration requirement. The R of the RC circuit is the internal RPU.
8.4 Device Functional Modes
8.4.1 External Configuration Interface
The TUSB8044 supports a serial interface for configuration register access. The device may be configured by an attached I2C EEPROM or accessed as a slave by an external SMBus master. The external interface is enabled when both the SCL/SMBCLK and SDA/SMBDAT pins are pulled up to 3.3 V at the de-assertion of reset. The mode, I2C master or SMBus slave, is determined by the state of SMBUSz/SS_SUSPEND pin at reset. With the integrated USB HID to I2C master, the I2C interface can also be used to program an external EEPROM or perform updates of an external MCU's firmware.
8.4.2 I2C EEPROM Operation
The TUSB8044 supports a single-master, fast mode (400KHz) connection to a dedicated I2C EEPROM when the I2C interface mode is enabled. In I2C mode, the TUSB8044 reads the contents of the EEPROM at bus address 1010000b using 7-bit addressing starting at address 0. The TUSB8044 will read the entire EEPROM contents using a single burst read transaction. The burst read transaction will end when the address reaches 2DFh.
If the value of the EEPROM contents at address byte 00h equals 55h, the TUSB8044 loads the configuration registers according to the EEPROM map. If the first byte is not 55h, the TUSB8044 exits the I2C mode and continues execution with the default values in the configuration registers. The hub will not connect on the upstream port until the configuration is completed.
NOTE
The bytes located above offset Ah are optional. The requirement for data in those addresses is dependent on the options configured in the Device Configuration, and Device Configuration 2 registers.
The minimum size I2C EEPROM required is 8Kbit.
For details on I2C operation refer to the UM10204 I2C-bus Specification and User Manual.
8.4.3 Port Configuration
The TUSB8044 port configurations can be selected by registers or efuse. The Port Used Configuration register (USED[3:0]) define how many ports can possibly be reported by the hub. The device removable configuration register (RMBL[3:0]) define if the ports that are reported as used have permanently connected devices or not. The USB 2.0 Only Port register (USB2_ONLY[3:0]) define whether or a used port is reported as part of the USB 2.0 hub or both the USB2.0 and USB3.1 hubs. The USB2_ONLY field will enable the USB2.0 port even if the corresponding USED bit is low. The internal HID port will always be the second highest number USB2.0 port. The billboard port will always be the highest number USB2.0 port. The table below shows examples of the possible combinations.
Table 6. TUSB8044 Downstream Port Configuration Examples
| USED[3:0] | RMBL[3:0] | USB2_ONLY [3:0] |
Reported Port Configuration | Physical to Logical Port mapping |
|---|---|---|---|---|
| 1111 | 1111 | 0000 | 4 Port USB3.1 Hub 6 Port USB2.0 Hub Port 5 is permanently attached HID Port 6 is permanently attached Billboard |
Physical1 => Logical Port1 for USB3.1 and USB2.0. Physical2 => Logical Port2 for USB3.1 and USB2.0. Physical3 => Logical Port3 for USB3.1 and USB2.0. Physical4 => Logical Port4 for USB3.1 and USB2.0. Physical5 => Logical Port5 for USB2.0. Physical6 => Logical Port6 for USB2.0. |
| 1110 | 1111 | 0000 | 3 Port USB3.1 Hub 5 Port USB2.0 Hub Port 4 is permanently attached HID Port 5 is permanently attached Billboard. |
Physical1 Not used. Physical2 => Logical Port1 for USB3.1 and USB2.0. Physical3 => Logical Port2 for USB3.1 and USB2.0. Physical4 => Logical Port3 for USB3.1 and USB2.0. Physical5 => Logical Port4 for USB 2.0. Physical6 => Logical Port5 for USB2.0. |
| 1100 | 0111 | 0000 | 2 Port USB 3.1 Hub 4 Port USB2.0 hub with permanently attached device on Port 2 Port 3 is a permanently attached HID Port 4 is a permanently attached Billboard |
Physical1 Not used. Physical2 Not used. Physical3 => Logical Port1 for USB3.1 and USB2.0. Physical4 => Logical Port2 for USB3.1 and USB2.0. Physical5 => Logical Port3 for USB2.0. Physical6 => Logical Port4 for USB2.0. |
| 0011 | 1111 | 0010 | 1 Port USB 3.1 Hub 4 Port USB 2.0 Hub Port 3 is a permanently attached HID Port 4 is a permanently attached Billboard |
Physical1 => Logical Port1 for USB3.1 and USB2.0. Physical2 => Logical Port2 for USB2.0. Physical3 Not Used. Physical4 Not used. Physical5 => Logical Port3 for USB2.0. Physical6 => Logical Port4 for USB2.0. |
| 1000 | 1111 | 0010 | 1 Port USB 3.1 Hub 4 Port USB 2.0 Hub Port 3 is a permanently attached HID Port 4 is a permanently attached Billboard |
Physical1 Not used. Physical2 => Logical Port2 for USB2.0. Physical3 Not used Physical4 => Logical Port1 for USB3.1 and USB2.0. Physical5 => Logical Port3 for USB2.0. Physical6 => Logical Port4 for USB2.0. |
| 1111 | 1111 | 1110 | 1 Port USB 3.1 Hub 6 Port USB 2.0 Hub Port 5 is a permanently attached HID Port 6 is a permanently attached Billboard |
Physical1 => Logical Port1 for USB3.1 and USB2.0. Physical2 => Logical Port2 for USB2.0. Physical3 => Logical Port3 for USB2.0. Physical4 => Logical Port4 for USB2.0. Physical5 => Logical Port5 for USB2.0. Physical6 => Logical Port6 for USB2.0. |
| 1010 | N/A | 0x0x | Invalid combination when USB2_ONLY = 0000, 0001, 0100, or 0101. If invalid combination is used, then physical port 4 will not operate at USB3.1 Gen 1 speeds. | |
| 1011 | N/A | 0x01 | Invalid combination when USB2_ONLY = 0001 or 0101. If invalid combination is used, then physical port 4 will not operate at USB3.1 Gen 1 speeds. | |
| 1110 | N/A | 010x | Invalid combination when USB2_ONLY = 0100 or 0101. If invalid combination is used, then physical port 4 will not operate at USB3.1 Gen 1 speeds. | |
| 1111 | N/A | 0101 | Invalid combination when USB2_ONLY = 0101. If invalid combination is used, then physical port 4 will not operate at USB3.1 Gen 1 speeds. |
8.4.4 SMBus Slave Operation
When the SMBus interface mode is enabled, the TUSB8044 supports read block and write block protocols as a slave-only SMBus device.
If the TUSB8044 is addressed by a host using an unsupported protocol it will not respond. The TUSB8044 waits indefinitely for configuration by the SMBus host and will not connect on the upstream port until the SMBus host indicates configuration is complete by clearing the CFG_ACTIVE bit.
Table 7. TUSB8044 SMBus 7-bit address Mapping
| TUSB8044 7-bit Address | Register Range | Description |
|---|---|---|
| 7'b1000100 | 00h thru FFh | Base 0 Registers |
| 7'b1000101 | 100h thru 1FFh | Base 1 Registers for Billboard string 1 and 2 |
| 7'b1000110 | 200h thru 2DFh | Base 2 Registers for Billboard string 1 and 2 |
For details on SMBus requirements, refer to the System Management Bus Specification.
8.5 Register Maps
8.5.1 Configuration Registers
The internal configuration registers are accessed on byte boundaries. The configuration register values are loaded with defaults but can be over-written when the TUSB8044 is in I2C or SMBus mode.
Table 8. TUSB8044 Register Map
| BYTE ADDRESS | CONTENTS | EEPROM CONFIGURABLE |
|---|---|---|
| 00h | ROM Signature Register | Yes |
| 01h | Vendor ID LSB | Yes |
| 02h | Vendor ID MSB | Yes |
| 03h | Product ID LSB | Yes |
| 04h | Product ID MSB | Yes |
| 05h | Device Configuration Register | Yes |
| 06h | Battery Charging Support Register | Yes |
| 07h | Device Removable Configuration Register | Yes |
| 08h | Port Used Configuration Register | Yes |
| 09h | Reserved. Must default to 00h. | Yes |
| 0Ah | Device Configuration Register 2 | Yes |
| 0Bh | USB 2.0 Port Polarity Control Register | Yes |
| 0Ch-0Fh | Reserved | No |
| 10h-1Fh | UUID Byte [15:0] | No |
| 20h-21h | LangID Byte [1:0] | Yes |
| 22h | Serial Number Length | Yes |
| 23h | Manufacturer String Length | Yes |
| 24h | Product String Length | Yes |
| 25h | Device Configuration Register 3 | Yes |
| 26h | USB 2.0 Only Port Register | Yes |
| 27h | Billboard SVID LSB | Yes |
| 28h | Billboard SVID MSB | Yes |
| 29h | Billboard PID LSB | Yes |
| 2Ah | Billboard PID MSB | Yes |
| 2Bh | Billboard Configuration | Yes |
| 2Ch | Billboard String1Len | Yes |
| 2Dh | Billboard String2Len | Yes |
| 2Eh | Reserved | No |
| 2Fh | Reserved | No |
| 30h-4Fh | Serial Number String Byte [31:0] | Yes |
| 50h-8Fh | Manufacturer String Byte [63:0] | Yes |
| 90h-CFh | Product String Byte [63:0] | Yes |
| D0h-D4h | Reserved | Yes(1) |
| D5h-D7h | Reserved | No |
| D8h-DCh | Reserved | Yes(1) |
| DDh-EFh | Reserved | No |
| F0h | Additional Features Configuration Register | Yes |
| F1h-F7h | Reserved | No |
| F8h | SMBus Device Status and Command Register | No |
| F9h - FFh | Reserved | No |
| 100h - 2DFh | USB Billboard Strings 1 and 2 | Yes |
8.5.2 ROM Signature Register
| Bit No. | 7 | 6 | 5 | 4 | 3 | 2 | 1 | 0 |
| Reset State | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
Table 9. Bit Descriptions – ROM Signature Register
| Bit | Field | Type | Description |
|---|---|---|---|
| 7:0 | romSignature | RW | ROM Signature Register. This register is used by the TUSB8044 in I2C mode to validate the attached EEPROM has been programmed. The first byte of the EEPROM is compared to the mask 55h and if not a match, the TUSB8044 aborts the EEPROM load and executes with the register defaults. |
8.5.3 Vendor ID LSB Register
| Bit No. | 7 | 6 | 5 | 4 | 3 | 2 | 1 | 0 |
| Reset State | 0 | 1 | 0 | 1 | 0 | 0 | 0 | 1 |
Table 10. Bit Descriptions – Vendor ID LSB Register
| Bit | Field | Type | Description |
|---|---|---|---|
| 7:0 | vendorIdLsb | RO/RW | Vendor ID LSB. Least significant byte of the unique vendor ID assigned by the USB-IF; the default value of this register is 51h representing the LSB of the TI Vendor ID 0451h. The value may be over-written to indicate a customer Vendor ID. Value used for this field will be the non-zero value written by EEPROM/SMBus to both PID and VID. If a zero value is written by EEPROM/SMbus to both PID and VID, then value used for this field will be the non-zero value from OTP. If a zero value is written by OTP, then value used for this field will be 51h. |
8.5.4 Vendor ID MSB Register
| Bit No. | 7 | 6 | 5 | 4 | 3 | 2 | 1 | 0 |
| Reset State | 0 | 0 | 0 | 0 | 0 | 1 | 0 | 0 |
Table 11. Bit Descriptions – Vendor ID MSB Register
| Bit | Field | Type | Description |
|---|---|---|---|
| 7:0 | vendorIdMsb | RO/RW | Vendor ID MSB. Most significant byte of the unique vendor ID assigned by the USB-IF; the default value of this register is 04h representing the MSB of the TI Vendor ID 0451h. The value may be over-written to indicate a customer Vendor ID. Value used for this field will be the non-zero value written by EEPROM/SMBus to both PID and VID. If a zero value is written by EEPROM/SMbus to both PID and VID, then value used for this field will be the non-zero value from OTP. If a zero value is written by OTP, then value used for this field will be 04h. |
8.5.5 Product ID LSB Register
| Bit No. | 7 | 6 | 5 | 4 | 3 | 2 | 1 | 0 |
| Reset State | 0 | 1 | 0 | 0 | 0 | 0 | 0 | 0 |
Table 12. Bit Descriptions – Product ID LSB Register
| Bit | Field | Type | Description |
|---|---|---|---|
| 7:0 | productIdLsb | RO/RW | Product ID LSB. Least significant byte of the product ID assigned by Texas Instruments and reported in the SuperSpeed Device descriptor. the default value of this register is 40h representing the LSB of the SuperSpeed product ID assigned by Texas Instruments The value reported in the USB 2.0 Device descriptor is the value of this register bit wise XORed with 00000010b. The value may be over-written to indicate a customer product ID. Value used for this field will be the non-zero value written by EEPROM/SMBus to both PID and VID. If a zero value is written by EEPROM/SMbus to both PID and VID, then value used for this field will be the non-zero value from OTP. If a zero value is written by OTP, then value used for this field will be 40h . |
8.5.6 Product ID MSB Register
| Bit No. | 7 | 6 | 5 | 4 | 3 | 2 | 1 | 0 |
| Reset State | 1 | 0 | 0 | 0 | 0 | 1 | 0 | 0 |
Table 13. Bit Descriptions – Product ID MSB Register
| Bit | Field | Type | Description |
|---|---|---|---|
| 7:0 | productIdMsb | RO/RW | Product ID MSB. Most significant byte of the product ID assigned by Texas Instruments; the default value of this register is 84h representing the MSB of the product ID assigned by Texas Instruments. The value may be over-written to indicate a customer product ID. Value used for this field will be the non-zero value written by EEPROM/SMBus to both PID and VID. If a zero value is written by EEPROM/SMbus to both PID and VID, then value used for this field will be the non-zero value from OTP. If a zero value is written by OTP, then value used for this field will be 84h. |
8.5.7 Device Configuration Register
| Bit No. | 7 | 6 | 5 | 4 | 3 | 2 | 1 | 0 |
| Reset State | 0 | 0 | 0 | 1 | 0 | 0 | 0 | 0 |
Table 14. Bit Descriptions – Device Configuration Register
| Bit | Field | Type | Description |
|---|---|---|---|
| 7 | customStrings | RW | Custom strings enable. This bit controls the ability to write to the Manufacturer String Length, Manufacturer String, Product String Length, Product String, and Language ID registers 0 = The Manufacturer String Length, Manufacturer String, Product String Length, Product String, and Language ID registers are read only 1 = The Manufacturer String Length, Manufacturer String, Product String Length, Product String, and Language ID registers may be loaded by EEPROM or written by SMBus The default value of this bit is 0. |
| 6 | customSernum | RW | Custom serial number enable. This bit controls the ability to write to the serial number registers. 0 = The Serial Number String Length and Serial Number String registers are read only 1 = Serial Number String Length and Serial Number String registers may be loaded by EEPROM or written by SMBus The default value of this bit is 0. |
| 5 | u1u2Disable | RW | U1 U2 Disable. This bit controls the U1/U2 support. 0 = U1/U2 support is enabled 1 = U1/U2 support is disabled, the TUSB8044 will not initiate or accept any U1 or U2 requests on any port, upstream or downstream, unless it receives or sends a Force_LinkPM_Accept LMP. After receiving or sending an FLPMA LMP, it will continue to enable U1 and U2 according to USB 3.1 protocol until it gets a power-on reset or is disconnected on its upstream port. When the TUSB8044 is in I2C mode, the TUSB8044 loads this bit from the contents of the EEPROM. When the TUSB8044 is in SMBUS mode, the value may be over-written by an SMBus host. |
| 4 | RSVD | RO | Reserved. This bit is reserved and returns 1 when read. |
| 3 | ganged | RW | Ganged. 0 = When fullPwrMgmtz = 0, each port is individually power switched and enabled by the PWRCTL[4:1]/BATEN[4:1] pins 1 = When fullPwrMgmtz = 0, the power switch control for all ports is ganged and enabled by the PWRCTL[4:1]/BATEN1 pin When the TUSB8044 is in I2C mode, the TUSB8044 loads this bit from the contents of the EEPROM. When the TUSB8044 is in SMBUS mode, the value may be over-written by an SMBus host. |
| 2 | fullPwrMgmtz | RW | Full Power Management. 0 = Port power switching status reporting is enabled 1 = Port power switching status reporting is disabled When the TUSB8044 is in I2C mode, the TUSB8044 loads this bit from the contents of the EEPROM. When the TUSB8044 is in SMBUS mode, the value may be over-written by an SMBus host. |
| 1 | u1u2TimerOvr | RW | U1 U2 Timer Override. When this field is set, the TUSB8044 will override the downstream ports U1/U2 timeout values set by USB3.1 Host software. If software sets value in the range of 1h - FFh, the TUSB8044 will use the value of FFh. If software sets value to 0, then TUSB8044 will use value of 0. |
| 0 | RSVD | RO | Reserved. This field is reserved and returns 0 when read. |
8.5.8 Battery Charging Support Register
| Bit No. | 7 | 6 | 5 | 4 | 3 | 2 | 1 | 0 |
| Reset State | 0 | 0 | 0 | 0 | X | X | X | X |
Table 15. Bit Descriptions – Battery Charging Support Register
| Bit | Field | Type | Description |
|---|---|---|---|
| 7:4 | RSVD | RO | Reserved. Read only, returns 0 when read. |
| 3:0 | batEn[3:0] | RW | Battery Charger Support. The bits in this field indicate whether the downstream port implements the charging port features. 0 = The port is not enabled for battery charging support features 1 = The port is enabled for battery charging support features Each bit corresponds directly to a downstream port, i.e. batEn0 corresponds to downstream port 1, and batEN1 corresponds to downstream port 2. The default value for these bits are loaded at the de-assertion of reset with the value of PWRCTL/BATEN[3:0]. When in I2C/SMBus mode the bits in this field may be over-written by EEPROM contents or by an SMBus host. |
8.5.9 Device Removable Configuration Register
| Bit No. | 7 | 6 | 5 | 4 | 3 | 2 | 1 | 0 |
| Reset State | 0 | 0 | 0 | 0 | X | X | X | X |
Table 16. Bit Descriptions – Device Removable Configuration Register
| Bit | Field | Type | Description |
|---|---|---|---|
| 7 | customRmbl | RW | Custom Removable. This bit controls the ability to write to the port removable bits, port used bits, and USB2_ONLY bits. 0 = rmbl[3:0], used[3:0], and USB2_ONLY[3:0] are read only and the values are loaded from the OTP ROM 1 = rmbl[3:0], used[3:0], and USB2_ONLY[3:0] are read/write and can be loaded by EEPROM or written by SMBus This bit may be written simultaneously with rmbl[3:0]. |
| 6:4 | RSVD | RO | Reserved. Read only, returns 0 when read. |
| 3:0 | rmbl[3:0] | RO/RW | Removable. The bits in this field indicate whether a device attached to downstream ports 4 through 1 are removable or permanently attached. 0 = The device attached to the port is not removable 1 = The device attached to the port is removable Each bit corresponds directly to a downstream port n + 1, i.e. rmbl0 corresponds to downstream port 1, rmbl1 corresponds to downstream port 2, etc. This field is read only unless the customRmbl bit is set to 1. Otherwise the value of this filed reflects the inverted values of the OTP ROM non_rmb[3:0] field. |
8.5.10 Port Used Configuration Register
| Bit No. | 7 | 6 | 5 | 4 | 3 | 2 | 1 | 0 |
| Reset State | 0 | 0 | 0 | 0 | 1 | 1 | 1 | 1 |
Table 17. Bit Descriptions – Port Used Configuration Register
| Bit | Field | Type | Description |
|---|---|---|---|
| 7:4 | RSVD | RO | Reserved. Read only. |
| 3:0 | used[3:0] | RO/RW | Used. The bits in this field indicate whether a port is enabled. 0 = The port is not used or disabled 1 = The port is used or enabled Each bit corresponds directly to a downstream port, i.e. used0 corresponds to downstream port 1, used1 corresponds to downstream port 2, etc. All combinations are supported with the exception of both ports 1 and 3 marked as disabled. This field is read only unless the customRmbl bit is set to 1. When the corresponding USB2_ONLY bit is set, the USB2 port will be used and enabled regardless of the bit programmed into this field. |
8.5.11 Device Configuration Register 2
| Bit No. | 7 | 6 | 5 | 4 | 3 | 2 | 1 | 0 |
| Reset State | 0 | 0 | X | 1 | 0 | 0 | 0 | 0 |
Table 18. Bit Descriptions – Device Configuration Register 2
| Bit | Field | Type | Description |
|---|---|---|---|
| 7 | Reserved | RO | Reserved. Read-only, returns 0 when read. |
| 6 | customBCfeatures | RW | Custom Battery Charging Feature Enable. This bit controls the ability to write to the battery charging feature configuration controls. 0 = The HiCurAcpModeEn is read only and the values are loaded from the OTP ROM. 1 = The HiCurAcpModeEn bit is read/write and can be loaded by EEPROM or written by SMBus. This bit may be written simultaneously with HiCurAcpModeEn. |
| 5 | pwrctlPol | RW | Power enable polarity. This bit is loaded at the de-assertion of reset with the value of the PWRCTL_POL pin. 0 = PWRCTL polarity is active low 1 = PWRCTL polarity is active high When the TUSB8044 is in I2C mode, the TUSB8044 loads this bit from the contents of the EEPROM. When the TUSB8044 is in SMBUS mode, the value may be over-written by an SMBus host. |
| 4 | HiCurAcpModeEn | RO/RW | High-current ACP mode enable. This bit enables the high-current tablet charging mode when the automatic battery charging mode is enabled for downstream ports. 0 = High current divider mode disabled . High current is ACP2 (default) 1 = High current divider mode enabled. High current mode is ACP3 This bit is read only unless the customBCfeatures bit is set to 1. If customBCfeatures is 0, the value of this bit reflects the value of the OTP ROM HiCurAcpModeEn bit. |
| 3:2 | Reserved | RW | Reserved |
| 1 | autoModeEnz | RW | Automatic Mode Enable. The automatic mode only applies to downstream ports with battery charging enabled when the upstream port is not connected. Under these conditions: 0 = Automatic mode battery charging features are enabled. 1 = Automatic mode is disabled; only Battery Charging DCP and CDP mode is supported. NOTE: When the upstream port is connected, Battery Charging CDP mode will be supported on all ports that are enabled for battery charging support regardless of the value of this bit. |
| 0 | RSVD | RO | Reserved. Read only, returns 0 when read. |
8.5.12 USB 2.0 Port Polarity Control Register
| Bit No. | 7 | 6 | 5 | 4 | 3 | 2 | 1 | 0 |
| Reset State | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
Table 19. Bit Descriptions – USB 2.0 Port Polarity Control Register
| Bit | Field | Type | Description |
|---|---|---|---|
| 7 | customPolarity | RW | Custom USB 2.0 Polarity. This bit controls the ability to write the p[4:0]_usb2pol bits. 0 = The p[4:0]_usb2pol bits are read only and the values are loaded from the OTP ROM. 1 = The p[4:0]_usb2pol bits are read/write and can be loaded by EEPROM or written by SMBus. This bit may be written simultaneously with the p[4:0]_usb2pol bits |
| 6:5 | RSVD | RO | Reserved. Read only, returns 0 when read. |
| 4 | p4_usb2pol | RO/RW | Downstream Port 4 DM/DP Polarity. This controls the polarity of the port. 0 = USB 2.0 port polarity is as documented by the pin out 1 = USB 2.0 port polarity is swapped from that documented in the pin out, i.e. DM becomes DP, and DP becomes DM. This bit is read only unless the customPolarity bit is set to 1. If customPolarity is 0 the value of this bit reflects the value of the OTP ROM p4_usb2pol bit. |
| 3 | p3_usb2pol | RO/RW | Downstream Port 3 DM/DP Polarity. This controls the polarity of the port. 0 = USB 2.0 port polarity is as documented by the pin out 1 = USB 2.0 port polarity is swapped from that documented in the pin out, i.e. DM becomes DP, and DP becomes DM. This bit is read only unless the customPolarity bit is set to 1. If customPolarity is 0 the value of this bit reflects the value of the OTP ROM p3_usb2pol bit. |
| 2 | p2_usb2pol | RO/RW | Downstream Port 2 DM/DP Polarity. This controls the polarity of the port. 0 = USB 2.0 port polarity is as documented by the pin out 1 = USB 2.0 port polarity is swapped from that documented in the pin out, i.e. DM becomes DP, and DP becomes DM. This bit is read only unless the customPolarity bit is set to 1. If customPolarity is 0 the value of this bit reflects the value of the OTP ROM p2_usb2pol bit. |
| 1 | p1_usb2pol | RORW | Downstream Port 1 DM/DP Polarity. This controls the polarity of the port. 0 = USB 2.0 port polarity is as documented by the pin out 1 = USB 2.0 port polarity is swapped from that documented in the pin out, i.e. DM becomes DP, and DP becomes DM. This bit is read only unless the customPolarity bit is set to 1. If customPolarity is 0 the value of this bit reflects the value of the OTP ROM p1_usb2pol bit. |
| 0 | p0_usb2pol | RO/RW | Upstream Port DM/DP Polarity. This controls the polarity of the port. 0 = USB 2.0 port polarity is as documented by the pin out 1 = USB 2.0 port polarity is swapped from that documented in the pin out, i.e. DM becomes DP, and DP becomes DM. This bit is read only unless the customPolarity bit is set to 1. If customPolarity is 0 the value of this bit reflects the value of the OTP ROM p0_usb2pol bit. |
8.5.13 UUID Registers
| Bit No. | 7 | 6 | 5 | 4 | 3 | 2 | 1 | 0 |
| Reset State | X | X | X | X | X | X | X | X |
Table 20. Bit Descriptions – UUID Byte N Register
| Bit | Field | Type | Description |
|---|---|---|---|
| 7:0 | uuidByte[n] | RO | UUID byte N. The UUID returned in the Container ID descriptor. The value of this register is provided by the device and is meets the UUID requirements of Internet Engineering Task Force (IETF) RFC 4122 A UUID URN Namespace. |
8.5.14 Language ID LSB Register
| Bit No. | 7 | 6 | 5 | 4 | 3 | 2 | 1 | 0 |
| Reset State | 0 | 0 | 0 | 0 | 1 | 0 | 0 | 1 |
Table 21. Bit Descriptions – Language ID LSB Register
| Bit | Field | Type | Description |
|---|---|---|---|
| 7:0 | langIdLsb | RO/RW | Language ID least significant byte. This register contains the value returned in the LSB of the LANGID code in string index 0. The TUSB8044 only supports one language ID. The default value of this register is 09h representing the LSB of the LangID 0409h indicating English United States. When customStrings is 1, this field may be over-written by the contents of an attached EEPROM or by an SMBus host. |
8.5.15 Language ID MSB Register
| Bit No. | 7 | 6 | 5 | 4 | 3 | 2 | 1 | 0 |
| Reset State | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
Table 22. Bit Descriptions – Language ID MSB Register
| Bit | Field | Type | Description |
|---|---|---|---|
| 7:0 | langIdMsb | RO/RW | Language ID most significant byte. This register contains the value returned in the MSB of the LANGID code in string index 0. The TUSB8044 only supports one language ID. The default value of this register is 04h representing the MSB of the LangID 0409h indicating English United States. When customStrings is 1, this field may be over-written by the contents of an attached EEPROM or by an SMBus host. |
8.5.16 Serial Number String Length Register
| Bit No. | 7 | 6 | 5 | 4 | 3 | 2 | 1 | 0 |
| Reset State | 0 | 0 | 0 | 1 | 1 | 0 | 0 | 0 |
Table 23. Bit Descriptions – Serial Number String Length Register
| Bit | Field | Type | Description |
|---|---|---|---|
| 7:6 | RSVD | RO | Reserved. Read only, returns 0 when read. |
| 5:0 | serNumStringLen | RO/RW | Serial number string length. The string length in bytes for the serial number string. The default value is 18h indicating that a 24 byte serial number string is supported. The maximum string length is 32 bytes. When customSernum is 1, this field may be over-written by the contents of an attached EEPROM or by an SMBus host. When the field is non-zero, a serial number string of serNumbStringLen bytes is returned at string index 1 from the data contained in the Serial Number String registers. |
8.5.17 Manufacturer String Length Register
| Bit No. | 7 | 6 | 5 | 4 | 3 | 2 | 1 | 0 |
| Reset State | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
Table 24. Bit Descriptions – Manufacturer String Length Register
| Bit | Field | Type | Description |
|---|---|---|---|
| 7 | RSVD | RO | Reserved. Read only, returns 0 when read. |
| 6:0 | mfgStringLen | RO/RW | Manufacturer string length. The string length in bytes for the manufacturer string. The default value is 0, indicating that a manufacturer string is not provided. The maximum string length is 64 bytes. When customStrings is 1, this field may be over-written by the contents of an attached EEPROM or by an SMBus host. When the field is non-zero, a manufacturer string of mfgStringLen bytes is returned at string index 3 from the data contained in the Manufacturer String registers. |
8.5.18 Product String Length Register
| Bit No. | 7 | 6 | 5 | 4 | 3 | 2 | 1 | 0 |
| Reset State | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
Table 25. Bit Descriptions – Product String Length Register
| Bit | Field | Type | Description |
|---|---|---|---|
| 7 | RSVD | RO | Reserved. Read only, returns 0 when read. |
| 6:0 | prodStringLen | RO/RW | Product string length. The string length in bytes for the product string. The default value is 0, indicating that a product string is not provided. The maximum string length is 64 bytes. When customStrings is 1, this field may be over-written by the contents of an attached EEPROM or by an SMBus host. When the field is non-zero, a product string of prodStringLen bytes is returned at string index 3 from the data contained in the Product String registers. |
8.5.19 Device Configuration Register 3
| Bit No. | 7 | 6 | 5 | 4 | 3 | 2 | 1 | 0 |
| Reset State | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
Table 26. Bit Descriptions – Device Configuration Register 3
| Bit | Field | Type | Description |
|---|---|---|---|
| 7:5 | RSVD | RO | Reserved. Read only, returns 0 when read. |
| 4 | USB2.0_only | RW | USB 2.0 hub reports as 2.0 only. This bit disables the USB 2.0 hub from reporting 5Gbps support in the wSpeedsSupported field of the USB SS BOS SS device capability descriptor. This bit will also disable the USB3.0 hub. This bit is read/write but the read value returned is the Boolean OR of this bit and the corresponding eFuse bit. If either bit is set, this feature is enabled. |
| 3 | Reserved | RO | Switch to reserved |
| 2 | I2C_100k | R/W | I2C 100kHz. This bit controls the clock rate of the I2C master for both USB to I2C requests . The EEPROM reads will occur at 400K unless eFuse is used to set the rate to 100k. This bit is read/write but the read value returned is the Boolean OR of this bit and the corresponding eFuse bit. If either bit is set, this feature is enabled. |
| 1 | Galaxy_Enz | R/W | Disable Galaxy compatible modes. When this field is high, Galaxy charging compatible mode will not be included in AUTOMODE charger sequence. This bit is read/write but the read value returned is the Boolean OR of this bit and the corresponding eFuse bit. If either bit is set, this feature is disabled. |
| 0 | FullAutoEn | R/W | Enable all divider battery charging modes. When automode is enabled and this bit is set, any DS port enabled for battery charging will attempt all divider battery charging modes before DCP, starting with the highest current option. The bit is writable, but the value read back is the Boolean OR of this bit and the corresponding eFuse control. If either bit is set, eFuse or this register, this feature is enabled. |
8.5.20 USB 2.0 Only Port Register
| Bit No. | 7 | 6 | 5 | 4 | 3 | 2 | 1 | 0 |
| Reset State | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
Table 27. Bit Descriptions – USB 2.0 Only Port Register
| Bit | Field | Type | Description |
|---|---|---|---|
| 7:4 | RSVD | RO | Reserved. Read only, returns 0 when read. |
| 3:0 | USB2_ONLY[3:0] | RO/RW | USB 2.0 Only Ports. The bits in this field primarily indicate whether a port is enabled only for USB 2.0 operation. This field is read-only unless customRmbl bit is set. Also, these bits will override the corresponding USED bit. A value of 0 indicates the hub port is enabled for both USB 3.1 and USB 2.0. A value of 1 indicates the hub port is enabled only for USB 2.0 operation. |
8.5.21 Billboard SVID LSB
| Bit No. | 7 | 6 | 5 | 4 | 3 | 2 | 1 | 0 |
| Reset State | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 1 |
Table 28. Bit Descriptions – Billboard SVID LSB
| Bit | Field | Type | Description |
|---|---|---|---|
| 7:0 | SVID_LSB | RW | SVID. This field is the LSB of the 16-bit SVID. This field defaults to 0x01 but can be changed using an external I2C EEPROM or SMBus. |
8.5.22 Billboard SVID MSB
| Bit No. | 7 | 6 | 5 | 4 | 3 | 2 | 1 | 0 |
| Reset State | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 |
Table 29. Bit Descriptions – Billboard SVID MSB
| Bit | Field | Type | Description |
|---|---|---|---|
| 7:0 | SVID_MSB | RW | SVID. This field is the MSB of the 16-bit SVID. This field defaults to 0xFF but can be changed using an external I2C EEPROM or SMBus. |
8.5.23 Billboard PID LSB
| Bit No. | 7 | 6 | 5 | 4 | 3 | 2 | 1 | 0 |
| Reset State | 1 | 1 | 1 | 0 | 1 | 1 | 1 | 0 |
Table 30. Bit Descriptions – Billboard PID LSB
| Bit | Field | Type | Description |
|---|---|---|---|
| 7:0 | BBPID_LSB | RW | Billboard PID LSB. This field represents the LSB of the 16-bit PID. This field defaults to 0xEE but can be changed using an external I2C EEPROM or SMBus |
8.5.24 Billboard PID MSB
| Bit No. | 7 | 6 | 5 | 4 | 3 | 2 | 1 | 0 |
| Reset State | 1 | 0 | 0 | 0 | 0 | 0 | 1 | 0 |
Table 31. Bit Descriptions – Billboard PID MSB
| Bit | Field | Type | Description |
|---|---|---|---|
| 7:0 | BBPID_LSB | RW | Billboard PID MSB. This field represents the MSB of the 16-bit PID. This field defaults to 0x82 but can be changed using an external I2C EEPROM or SMBus. |
8.5.25 Billboard Configuration
| Bit No. | 7 | 6 | 5 | 4 | 3 | 2 | 1 | 0 |
| Reset State | 1 | 0 | 0 | 0 | X | X | 0 | 0 |
Table 32. Bit Descriptions – Billboard Configuration.
| Bit | Field | Type | Description |
|---|---|---|---|
| 7:4 | VCONN_PWR | RW | VCONN power. This field is used when SMBus mode is selected. When I2C mode is selected, this field is read-only and will always return 1000b. The TUSB8044 will use value programmed into this register to update the VCONN Power field in the Billboard Capability Descriptor. 0000b: 1 Watt 0001b: 1.5 Watts 0010b: 2 Watts 0011b: 3 Watts 0100b: 4 Watts 0101b: 5 Watts 0110b: 6 Watts 0111b: Reserved. 1XXXb: The adapter does NOT require any Vconn power. |
| 3:2 | bbConfigured[1:0] | RW | bmConfigured[1:0]. This field is used when SMBus mode is selected. Controls the bmConfigured[1:0] fields in the Billboard Capability Descriptor. When I2C mode is selected, then bmConfigured[1:0] fields are read-only and values are determined by BBbmConfigured[1:0] pins. 00b: Unspecified Error 01b: Alternate Mode Configuration Not attempted. 10b: Alternate Mode configured attempted but unsuccessful. 11b: Alternate Mode configured successfully. |
| 1 | bAdditionalFailureInfo | RW | bAdditionalFailureInfo. This field is used when SMBus mode is selected. This field is ignored if VCONN_PWR[3] is set. The value programmed into this field will be presented in the bAdditionalFailureInfo field in the Billboard Capability Descriptor. When in I2C mode, this field is read-only and defaults to 0. |
| 0 | BillboardEN | RW | Billboard Enable. This field is used when SMBus mode is selected. When I2C mode is selected, this field is read-only and Billboard connected state is determined by BBEN pin. 0b: Billboard not connected. 1b: Billboard connected. |
8.5.26 Billboard String1 Length
| Bit No. | 7 | 6 | 5 | 4 | 3 | 2 | 1 | 0 |
| Reset State | 0 | 0 | 1 | 0 | 1 | 1 | 0 | 0 |
Table 33. Bit Descriptions – Billboard String1 Length.
| Bit | Field | Type | Description |
|---|---|---|---|
| 7:0 | BBString1Len | RW | Billboard String1Len. This field indicates the length in number of UNICODE characters of the Billboard string1. This is not the length of the string descriptor. BBString1Len size + BBString2Len size must be <= 480 bytes, or < 480 if # characters in string 1 is odd, because string 2 must start on an address that is a multiple of 4 (bytes). The bLength field of the Additional Info URL string descriptor is 2 + (2 * BBString1Len). This field defaults to 0x2C but can be changed using an external I2C EEPROM or SMBus. |
8.5.27 Billboard String2 Length
| Bit No. | 7 | 6 | 5 | 4 | 3 | 2 | 1 | 0 |
| Reset State | 0 | 0 | 1 | 0 | 1 | 1 | 0 | 0 |
Table 34. Bit Descriptions – Billboard String2 Length.
| Bit | Field | Type | Description |
|---|---|---|---|
| 7:0 | BBString2Len | RW | Billboard String2Len. This field indicates the length in number of UNICODE characters of the Billboard string2. This is not the length of the string descriptor. The bLength field of the Alternate Mode string descriptor is 2 + (2 * BBString2Len). This field defaults to 0x2D but can be changed using an external I2C EEPROM or SMBus. |
8.5.28 Serial Number String Registers
| Bit No. | 7 | 6 | 5 | 4 | 3 | 2 | 1 | 0 |
| Reset State | X | X | x | x | x | x | x | x |
Table 35. Bit Descriptions – Serial Number Registers
| Bit | Field | Type | Description |
|---|---|---|---|
| 7:0 | serialNumber[n] | RO/RW | Serial Number byte N. The serial number returned in the Serial Number string descriptor at string index 1. The default value of these registers is assigned by TI. When customSernum is 1, these registers may be over-written by EEPROM contents or by an SMBus host. |
8.5.29 Manufacturer String Registers
| Bit No. | 7 | 6 | 5 | 4 | 3 | 2 | 1 | 0 |
| Reset State | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
Table 36. Bit Descriptions – Manufacturer String Registers
| Bit | Field | Type | Description |
|---|---|---|---|
| 7:0 | mfgStringByte[n] | RW | Manufacturer string byte N. These registers provide the string values returned for string index 3 when mfgStringLen is greater than 0. The number of bytes returned in the string is equal to mfgStringLen. The programmed data should be in UNICODE UTF-16LE encodings as defined by The Unicode Standard, Worldwide Character Encoding, Version 5.0. |
8.5.30 Product String Registers
| Bit No. | 7 | 6 | 5 | 4 | 3 | 2 | 1 | 0 |
| Reset State | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
Table 37. Bit Descriptions – Product String Byte N Register
| Bit | Field | Type | Description |
|---|---|---|---|
| 7:0 | prodStringByte[n] | RO/RW | Product string byte N. These registers provide the string values returned for string index 2 when prodStringLen is greater than 0. The number of bytes returned in the string is equal to prodStringLen. The programmed data should be in UNICODE UTF-16LE encodings as defined by The Unicode Standard, Worldwide Character Encoding, Version 5.0. |
8.5.31 Additional Feature Configuration Register
| Bit No. | 7 | 6 | 5 | 4 | 3 | 2 | 1 | 0 |
| Reset State | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
Table 38. Bit Descriptions – Additional Feature Configuration Register
| Bit | Field | Type | Description |
|---|---|---|---|
| 7:5 | Reserved | RW | Reserved. This field defaults to 3'b000 and must not be changed. |
| 4 | stsOutputEn | RW | Status output enable. This field when set enables of the Status output signals, HS_UP, HS_SUSPEND, SS_UP, SS_SUSPEND. 0 = STS outputs are disabled. 1 = STS outputs are enabled. This bit may be loaded by EEPROM or over-written by a SMBUS host. |
| 3:1 | pwronTime | RW | Power On Delay Time. When the efuse_pwronTime field is all 0s, this field sets the delay time from the removal disable of PWRCTL to the enable of PWRCTL when transitioning battery charging modes. For example, when disabling the power on a transition from ACP to DCP Mode. The nominal timing is defined as follows:
Equation 1. TPWRON_EN = (pwronTime x 1) x 200 ms
This field may be over-written by EEPROM contents or by an SMBus host. |
| 0 | usb3spreadDis | RW | USB3 Spread Spectrum Disable. This bit allows firmware to disable the spread spectrum function of the USB3 phy PLL. 0 = Spread spectrum function is enabled 1= Spread spectrum function is disabled This bit may be loaded by EEPROM or over-written by a SMBUS host. |
8.5.32 SMBus Device Status and Command Register
| Bit No. | 7 | 6 | 5 | 4 | 3 | 2 | 1 | 0 |
| Reset State | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
Table 39. Bit Descriptions – SMBus Device Status and Command Register
| Bit | Field | Type | Description |
|---|---|---|---|
| 7:2 | RSVD | RO | Reserved. Read only, returns 0 when read. |
| 1 | smbusRst | RSU | SMBus interface reset. This bit loads the registers back to their GRSTz values. Note, that since this bit can only be set when in SMBus mode the cfgActive bit is also reset to 1. When software sets this bit it must reconfigure the registers as necessary. This bit is set by writing a 1 and is cleared by hardware on completion of the reset. A write of 0 has no effect. |
| 0 | cfgActive | RCU | Configuration active. This bit indicates that configuration of the TUSB8044 is currently active. The bit is set by hardware when the device enters the I2C or SMBus mode. The TUSB8044 shall not connect on the upstream port while this bit is 1. When in I2C mode, the bit is cleared by hardware when the TUSB8044 exits the I2C mode. When in the SMBus mode, this bit must be cleared by the SMBus host in order to exit the configuration mode and allow the upstream port to connect. The bit is cleared by a writing 1. A write of 0 has no effect. |
8.5.33 Billboard String1_2
| Bit No. | 7 | 6 | 5 | 4 | 3 | 2 | 1 | 0 |
| Reset State | X | X | X | X | X | X | X | X |
Table 40. Bit Descriptions – Billboard String1_2
| Bit | Field | Type | Description |
|---|---|---|---|
| 7:0 | BBString12 | W | Billboard String1 and String2. This field can only be written to and can not be read from. String 1 defaults http://www.displayport.org String 2 defaults to "DisplayPort" The default can be changed using an external I2C EEPROM or SMBus. |