SLLSFB2 April   2020 TUSB1146

PRODUCTION DATA.  

  1. 1 Features
  2. 2 Applications
  3. 3 Description
    1.     Device Images
      1.      Simplified Schematics
  4. 4 Revision History
  5. 5 TUSB1146 Pin Configuration and Functions
    1.     TUSB1146 Pin Functions
  6. 6 Specifications
    1. 6.1  Absolute Maximum Ratings
    2. 6.2  ESD Ratings
    3. 6.3  Recommended Operating Conditions
    4. 6.4  Thermal Information
    5. 6.5  Power Supply Characteristics
    6. 6.6  Control I/O DC Electrical Characteristics
    7. 6.7  USB and DP Electrical Characteristics
    8. 6.8  DCI Electrical Characteristics
    9. 6.9  Timing Requirements
    10. 6.10 Switching Characteristics
    11. 6.11 Typical Characteristics
  7. 7 Parameter Measurement Information
  8. 8 Detailed Description
    1. 8.1 Overview
    2. 8.2 Functional Block Diagram
    3. 8.3 Feature Description
      1. 8.3.1 USB 3.1
      2. 8.3.2 DisplayPort
      3. 8.3.3 4-level Inputs
      4. 8.3.4 Receiver Linear Equalization
    4. 8.4 Device Functional Modes
      1. 8.4.1 Device Configuration in GPIO Mode
      2. 8.4.2 Device Configuration In I2C Mode
      3. 8.4.3 DisplayPort Mode
      4. 8.4.4 Linear EQ Configuration
      5. 8.4.5 VOD modes
        1. 8.4.5.1 Linearity VOD
        2. 8.4.5.2 Limited VOD
      6. 8.4.6 Transmit Equalization
      7. 8.4.7 USB3.1 Modes
      8. 8.4.8 Downstream Facing Port Adaptive Equalization
        1. 8.4.8.1 Fast Adaptive Equalization in I2C Mode
        2. 8.4.8.2 Full Adaptive Equalization
    5. 8.5 Programming
      1. 8.5.1 Transition between Modes
      2. 8.5.2 Pseudocode Examples
        1. 8.5.2.1 Fast AEQ with linear redriver mode
        2. 8.5.2.2 Fast AEQ with limited redriver mode
        3. 8.5.2.3 Full AEQ with linear redriver mode
        4. 8.5.2.4 Full AEQ with limited redriver mode
      3. 8.5.3 TUSB1146 I2C Address Options
      4. 8.5.4 TUSB1146 I2C Slave Behavior
    6. 8.6 Register Maps
      1. 8.6.1 TUSB1146 Registers
        1. 8.6.1.1  General_1 Register (Offset = 0xA) [reset = 0x1]
          1. Table 13. General_1 Register Field Descriptions
        2. 8.6.1.2  DCI_TXEQ_CTRL Register (Offset = 0xB) [reset = 0x6C]
          1. Table 14. DCI_TXEQ_CTRL Register Field Descriptions
        3. 8.6.1.3  DP01EQ_SEL Register (Offset = 0x10) [reset = 0x0]
          1. Table 15. DP01EQ_SEL Register Field Descriptions
        4. 8.6.1.4  DP23EQ_SEL Register (Offset = 0x11) [reset = 0x0]
          1. Table 16. DP23EQ_SEL Register Field Descriptions
        5. 8.6.1.5  DisplayPort_1 Register (Offset = 0x12) [reset = 0x0]
          1. Table 17. DisplayPort_1 Register Field Descriptions
        6. 8.6.1.6  DisplayPort_2 Register (Offset = 0x13) [reset = 0x0]
          1. Table 18. DisplayPort_2 Register Field Descriptions
        7. 8.6.1.7  AEQ_CONTROL1 Register (Offset = 0x1C) [reset = 0xF0]
          1. Table 19. AEQ_CONTROL1 Register Field Descriptions
        8. 8.6.1.8  AEQ_CONTROL2 Register (Offset = 0x1D) [reset = 0x20]
          1. Table 20. AEQ_CONTROL2 Register Field Descriptions
        9. 8.6.1.9  AEQ_LONG Register (Offset = 0x1E) [reset = 0x77]
          1. Table 21. AEQ_LONG Register Field Descriptions
        10. 8.6.1.10 USBC_EQ Register (Offset = 0x20) [reset = 0x0]
          1. Table 22. USBC_EQ Register Field Descriptions
        11. 8.6.1.11 SS_EQ Register (Offset = 0x21) [reset = 0x0]
          1. Table 23. SS_EQ Register Field Descriptions
        12. 8.6.1.12 USB3_MISC Register (Offset = 0x22) [reset = 0x44]
          1. Table 24. USB3_MISC Register Field Descriptions
        13. 8.6.1.13 USB_STATUS Register (Offset = 0x24) [reset = 0x41]
          1. Table 25. USB_STATUS Register Field Descriptions
        14. 8.6.1.14 VOD_CTRL Register (Offset = 0x32) [reset = 0x40]
          1. Table 26. VOD_CTRL Register Field Descriptions
        15. 8.6.1.15 AEQ_STATUS Register (Offset = 0x3B) [reset = 0x0]
          1. Table 27. AEQ_STATUS Register Field Descriptions
  9. 9 Application and Implementation
    1. 9.1 Application Information
    2. 9.2 Typical Application
      1. 9.2.1 Design Requirements
      2. 9.2.2 Detailed Design Procedure
        1. 9.2.2.1 USB and DP Upstream Facing Port (USB Host / DP GPU to USB-C receptacle) Configuration
        2. 9.2.2.2 USB Downstream Facing Port (USB-C receptacle to USB Host) Configuration
          1. 9.2.2.2.1 Fixed Equalization
          2. 9.2.2.2.2 Fast Adaptive Equalization
          3. 9.2.2.2.3 Full Adaptive Equalization
      3. 9.2.3 Application Curve
    3. 9.3 System Examples
      1. 9.3.1 USB 3.1 Only
      2. 9.3.2 USB 3.1 and 2 Lanes of DisplayPort
      3. 9.3.3 DisplayPort Only
  10. 10Power Supply Recommendations
  11. 11Layout
    1. 11.1 Layout Guidelines
    2. 11.2 Layout Example
  12. 12Device and Documentation Support
    1. 12.1 Receiving Notification of Documentation Updates
    2. 12.2 Community Resources
    3. 12.3 Trademarks
    4. 12.4 Electrostatic Discharge Caution
    5. 12.5 Glossary
  13. 13Mechanical, Packaging, and Orderable Information

Package Options

Mechanical Data (Package|Pins)
Thermal pad, mechanical data (Package|Pins)
Orderable Information

8.3.2 DisplayPort

The TUSB1146 supports up to 4 DisplayPort lanes at datarates up to 10 Gbps (UHBR10). The TUSB1146, when configured in DisplayPort mode, monitors the native AUX traffic as it traverses between DisplayPort source and DisplayPort sink. For the purposes of reducing power, the TUSB1146 manages the number of active DisplayPort lanes based on the content of the AUX transactions. The TUSB1146 snoops native AUX writes to DisplayPort sink’s DPCD registers 0x00101 (LANE_COUNT_SET) and 0x00600 (SET_POWER_STATE). TUSB1146 disables/enables lanes based on value written to LANE_COUNT_SET. The TUSB1146 disables all lanes when SET_POWER_STATE is in the D3. Otherwise active lanes will be based on value of LANE_COUNT_SET.

DisplayPort AUX snooping is enabled by default but can be disabled by changing the AUX_SNOOP_DISABLE register. Once AUX snoop is disabled, management of TUSB1146 DisplayPort lanes are controlled through various configuration registers. When TUSB1146 is enabled for GPIO mode (I2C_EN = "0"), the CAD_SNK pin can be used to disable AUX snooping. When CAD_SNK pin is high, the AUX snooping functionality is disabled and all four DisplayPort lanes will be active.