SPRUJ09D March   2022  – September 2023 AM2631 , AM2631-Q1 , AM2632 , AM2632-Q1 , AM2634 , AM2634-Q1

 

  1.   1
  2.   Abstract
  3.   Trademarks
  4. 1Preface: Read This First
    1. 2.1 Sitara MCU+ Academy
    2. 2.2 If You Need Assistance
    3. 2.3 Important Usage Notes
  5. 2Control Card Overview
    1. 3.1 Kit Contents
    2. 3.2 Key Features
    3. 3.3 Component Identification
    4. 3.4 HSEC 180-pin Control Card Docking Station
    5. 3.5 Compliance
  6. 3Board Setup
    1. 4.1 Power Requirements
      1. 4.1.1 Power Input Using USB Type-C Connector
      2. 4.1.2 Power Status LEDs
      3. 4.1.3 Power Tree
      4. 4.1.4 Power Sequence
    2. 4.2 Push Buttons
    3. 4.3 Boot Mode Selection
    4. 4.4 JTAG Path Selection
  7. 4Hardware Description
    1. 5.1  Functional Block Diagram
    2. 5.2  GPIO Mapping
    3. 5.3  Reset
    4. 5.4  Clock
    5. 5.5  Memory Interface
      1. 5.5.1 QSPI
      2. 5.5.2 Board ID EEPROM
    6. 5.6  Ethernet Interface
      1. 5.6.1 RGMII
      2. 5.6.2 PRU-ICSS
      3. 5.6.3 LED Indication in RJ45 Connector
    7. 5.7  I2C
    8. 5.8  Industrial Application LEDs
    9. 5.9  SPI
    10. 5.10 UART
    11. 5.11 MCAN
    12. 5.12 FSI
    13. 5.13 JTAG
    14. 5.14 Test Automation Header
    15. 5.15 LIN
    16. 5.16 MMC
    17. 5.17 ADC and DAC
    18. 5.18 HSEC Pinout and Pinmux Mapping
  8. 5References
    1. 6.1 References
    2. 6.2 Other TI Components Used in This Design
  9.   Revision History
  10.   A E2 Design Changes
  11.   B E1 HSEC Pinout Table

3.1.1 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 should be capable of providing 3A at 5 V and should advertise 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 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 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 AM263x Control Card's power requirement is 5 V at 3A and if the source is not capable of providing the required power, the output at the NOR gate becomes low that disables the VBUS_MAIN power switch. Therefore, if the power requirement is not met, all power supplies except VSYS_TA_3V3 will remain in the off state. The board gets powered on completely only when the source can provide 5 V at 3A.

GUID-20220309-SS0I-SGZL-SVVD-BVRVTNGDLSNM-low.png Figure 3-2 Type-C CC Configuration
Table 3-1 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 solution based on discrete regulators for each of the power rails. During the initial stage of the power supply, 5V supplied by the type-C USB connector is used to generate all of the necessary voltages required by the Control Card.

Discrete DC-DC buck regulators are used to generate the supplies required for the AM263x system on a chip (SoC) and other peripherals

One DC-DC buck regulator (TPS54334) is used to generate the 3.3 V supply from the main 5V supply. The 3.3V supply is then used as Vin for two different DC-DC buck regulators: 1.2V supply (TPS62826), and 1.7V VPP supply (TPS75801). The test automation header's 3.3V supply is generated by one DC-DC buck regulator (TPS62177) from the main 5V supply.