SPRUJ93 august   2023

 

  1.   1
  2.   Description
  3.   Features
  4.   4
  5. 1Evaluation Module Overview
    1.     Preface: Read This First
      1. 1.1.1 Sitara™ MCU+ Academy
      2. 1.1.2 If You Need Assistance
      3. 1.1.3 Important Usage Notes
    2. 1.1 Introduction
    3. 1.2 Kit Contents
    4. 1.3 Specification
    5. 1.4 Device Information
    6. 1.5 HSEC 180-pin Control Card Docking Station
    7. 1.6 Security
  6. 2Hardware
    1. 2.1  Functional Block Diagram
    2. 2.2  Component Identification
    3. 2.3  Power Requirements
      1. 2.3.1 Power Input Using USB Type-C Connector
      2. 2.3.2 Power Status LEDs
      3. 2.3.3 Power Tree
      4. 2.3.4 Power Sequence
      5. 2.3.5 PMIC
    4. 2.4  Reset
    5. 2.5  Clock
    6. 2.6  Boot Mode Selection
    7. 2.7  JTAG Path Selection
    8. 2.8  Header Information
    9. 2.9  GPIO Mapping
    10. 2.10 Push Buttons
    11. 2.11 Test Points
    12. 2.12 Interfaces
      1. 2.12.1  Memory Interface
        1. 2.12.1.1 QSPI
        2. 2.12.1.2 Board ID EEPROM
      2. 2.12.2  Ethernet Interface
        1. 2.12.2.1 RGMII
        2. 2.12.2.2 PRU-ICSS
        3. 2.12.2.3 LED Indication in RJ45 Connector
      3. 2.12.3  I2C
      4. 2.12.4  Industrial Application LEDs
      5. 2.12.5  SPI
      6. 2.12.6  UART
      7. 2.12.7  MCAN
      8. 2.12.8  FSI
      9. 2.12.9  JTAG
      10. 2.12.10 Test Automation Header
      11. 2.12.11 LIN
      12. 2.12.12 MMC
      13. 2.12.13 ADC and DAC
    13. 2.13 HSEC Pinout and Pinmux Mapping
  7. 3Software
    1. 3.1 SDK Installation
  8. 4Hardware Design Files
  9. 5Additional Information
    1. 5.1 Trademarks
    2. 5.2 E1 Design Hardware Modifications
  10. 6References
    1. 6.1 Reference Documents
    2. 6.2 Other TI Components Used in This Design

2.3.1 Power Input Using USB Type-C Connector

The AM263x Control Card can be powered through a USB type-C connection. The USB Type-C source is capable of providing 3 A at 5 V and advertises the current sourcing capability through the CC1 and CC2 signals. On this EVM, the CC1 and CC2 from the USB type-C connector are interfaced to the port controller IC (TUSB320LAIRWBR). This device uses the CC pins to determine port attach/detach, cable orientation, role detection, and port control for Type-C current mode. The CC logic detects the Type-C current mode as default, medium, or high depending on the role detected.

The Port pin is pulled down to ground with a resistor to configure the IC in upward facing port (UFP) mode. VBUS detection is implemented to determine a successful attach in upward facing port (UFP) mode. The OUT1 and OUT2 pins are connected to a NOR gate. Active low on both the OUT1 and OUT2 pins advertises high current (3A) in the attached state which enables the load switch (TPS22965DSGT) to provide the VBUS_MAIN supply which powers other regulators that create the power rails for the device.

In UFP mode, the port controller IC constantly presents pull-down resistors on both CC pins. The port controller IC also monitors the CC pins for the voltage level corresponding to the Type-C mode current advertisement by the connected downward facing port (DFP). The port controller IC de-bounces the CC pins and waits for VBUS detection before successfully attaching. As a UFP, the port controller device detects and communicates the advertised current level of the DFP to the system through the OUT1 and OUT2 GPIOs.

The power requirement for AM263x Control Card is 5 V at 3 A. If the source is not capable of providing the required power, then the output at the NOR gate becomes low, disabling the VBUS_MAIN power switch. Therefore, if the power requirement is not met, then all power supplies except VSYS_TA_3V3 remain in an off state. The board gets powered on completely only when the source can provide 5 V at 3 A.

GUID-20220309-SS0I-SGZL-SVVD-BVRVTNGDLSNM-low.png Figure 2-5 Type-C CC Configuration
Table 2-1 Current Sourcing Capability and State of USB Type-C Cable
OUT1 OUT2 Advertisement
H H Default current in unattached state
H L Default current in attached state
L H Medium current (1.5A) in attached state
L L High current (3.0A) in attached state

The AM263x Control Card includes a power source based on a Power Management Integrated Chip (PMIC) for each of the power rails. During the initial stage of the power supply, 5 V supplied by the type-C USB connector is used to generate all of the necessary voltages required by the PMIC and subsequently the rest of the board via the PMIC LDO outputs. For more information about the PMIC, refer to Section 2.3.5.