SPRUJF7 March   2025

 

  1.   1
  2.   Description
  3.   Get Started
  4.   Features
  5.   5
  6. 1Evaluation Module Overview
    1. 1.1 Introduction
      1.      Preface: Read This First
      2. 1.1.1 Sitara MCU+ Academy
      3. 1.1.2 Important Usage Notes
    2. 1.2 Kit Contents
    3. 1.3 Specification
      1. 1.3.1 Component Identification
      2. 1.3.2 Functional Block Diagram
    4. 1.4 Device Information
  7. 2Hardware
    1. 2.1  Additional Images
    2. 2.2  Setup
    3. 2.3  Power Requirements
      1. 2.3.1 Power Tree
      2. 2.3.2 Power Sequence
    4. 2.4  Header Information
      1. 2.4.1 Baseboard Headers (J1, J2, J3)
      2. 2.4.2 HSEC Pinout
      3. 2.4.3 XDS Debug Header (J4)
      4. 2.4.4 FSI Header
      5. 2.4.5 OSPI Expansion Connector
      6. 2.4.6 Ethernet Add-on Board Connector
    5. 2.5  Reset
    6. 2.6  Clock
    7. 2.7  GPIO Mapping
    8. 2.8  Interfaces
      1. 2.8.1 USB
      2. 2.8.2 UART
      3. 2.8.3 FSI
      4. 2.8.4 OSPI
      5. 2.8.5 Ethernet
        1. 2.8.5.1 RGMII
        2. 2.8.5.2 PRU-ICSS
          1. 2.8.5.2.1 On-Board PHY
          2. 2.8.5.2.2 Ethernet Add-on Board
      6. 2.8.6 I2C
      7. 2.8.7 SPI
      8. 2.8.8 TMDSHSECDOCK-AM263 Peripherals
        1. 2.8.8.1 ADC/DAC
        2. 2.8.8.2 MCAN
        3. 2.8.8.3 LIN1
        4. 2.8.8.4 JTAG
        5. 2.8.8.5 GPIO
    9. 2.9  Debug Information
    10. 2.10 Test Points
    11. 2.11 Assembly Instructions
    12. 2.12 Best Practices
  8. 3Software
  9. 4Hardware Design Files
  10. 5Additional Information
    1. 5.1 Trademarks
  11. 6References
    1. 6.1 Other TI Components Used in This Design
  12. 7Revision History

2.2 Setup

The AM261x SOM to HSEC adapter board supports controlSOM Configuration 2: controlCARD Backward Compatibility Configuration. Power for the system is provided to the SOM to HSEC adapter + controlSOM sysstem through an HSEC dock (TMDSHSECDOCK-AM263 or TMDSHSECDOCK). An emulation debug probe such as the XDS110ISO-EVM is required to provide debug connectivity to the MCU on the controlSOM. The controlSOM, XDS110 debug probe, and HSEC dock are sold separately.

TMDSHSECDOCK-AM263 and TMDSHSECDOCK are HSEC docking stations are required to use the HSEC180ADAPEVM-AM2, and provide the power supply to the overall controlSOM sytem. Both HSEC docking stations enable rapid prototyping and enhances the development capability of the AM261x controlSOM. The TMDSHSECDOCK-AM263 contains hardware to enable AM26x MCU-specific features that allow various peripherals not enabled on-board the controlSOM to be interfaced with, whereas the TMDSHSECDOCK only enables access to the IOs pinned out to the SOM HD connectors. Table 2-1 compares the features of each docking station.

Table 2-1 AM26x controlCARD HSEC Dock Comparison
Feature TMDSHSECDOCK TMDSHSECDOCK-AM263
USB Type-C power input ✓ ✓
GPIO breakout headers ✓ ✓
Breadboard area for customizable routing and prototyping ✓
2-channel MCAN Transceiver ✓
2-channel LIN Transciever ✓
MIPI-60 debug header ✓
14-pin JTAG header ✓ ✓
ADC input signal conditioning ✓

In this configuration, Code Composer Studio™ connects to the SOM to HSEC adapter board via JTAG and enables software development. The XDS110 debug-probe also enumerates a virtual COM port (VCP) for communication with the MCU via UART.

Follow these steps to enable this configuration:

  1. The following equipment is required:
    1. AM261x controlSOM (AM261-SOM-EVM)
    2. AM261x HSEC180 adapter board (HSEC180ADAPEVM-AM2)
    3. AM26x controlCARD compatible baseboard/HSEC180 docking station (TMDSHSECDOCK-AM263 or TMDSHSECDOCK)
    4. XDS110 isolated debug probe (XDS110ISO-EVM)
    5. 2 USB Type-C cables
    6. (Optional) DC 5V power supply if using TMDSHSECDOCK
  2. Verify the switch settings are correct on each EVM.
    1. AM261-SOM-EVM:
      1. Use SW1 to select the desired boot mode (see Boot Mode Selection in the AM261-SOM-EVM User Guide)
      2. Use S1, S2, S4 to select the desired ADC voltage reference mode (if applicable for the application) (see ADC and DAC in the AM261-SOM-EVM User Guide)
    2. XDS110ISO-EVM:
      1. S1 selects JTAG mode – set to JTAG mode.
      2. S2 enables UART/SPI connection – set to ON mode.
  3. Attach the controlSOM to the SOM to HSEC180 adapter board
  4. Ensure the controlSOM is correctly oriented. The J1 header on the controlSOM should connect with the J1 header on the HSEC180 adapter board.
  5. Insert the HSEC180 adapter board into the HSEC docking station
  6. Connect the XDS110ISO-EVM into the connector J4 of the HSEC-180 adapter board (Figure 2-1) OR J7 (Figure 2-2) of the controlSOM.
  7. Connect the USB cable into connector J5 on the XDS110 isolated debug probe. The XDS110 isolated probe is powered on
  8. Connect a USB cable into the connector on the HSEC docking station.
  9. HSEC Dock Power
    1. If using TMDSHSECDOCK-AM263 - Flip SW3 to the ON position
    2. If using TMDSHSECDOCK - Flip S1 to the USB-ON position
  10. Verify the power status LEDs (D5, D6, D7) on the controlSOM are turned on.
  11. The controlSOM is ready for use. Follow the steps in Software to get started developing software.

HSEC180ADAPEVM-AM2 AM26x controlCARD Backward Compatibility Configuration - XDS110ISO connected to HSEC180ADAPEVM-AM2 J4 Figure 2-1 AM26x controlCARD Backward Compatibility Configuration - XDS110ISO connected to HSEC180ADAPEVM-AM2 J4
HSEC180ADAPEVM-AM2 AM26x controlCARD Backward Compatibility Configuration - XDS110ISO connected to controlSOM J7 Figure 2-2 AM26x controlCARD Backward Compatibility Configuration - XDS110ISO connected to controlSOM J7