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

2.12.1.2 Board ID EEPROM

The AM263x Control Card has a I2C based 1 Mbit EEPROM (CAT23M01WI-GT3) to store board configuration details. The Board ID EEPROM is connected to the I2C0 interface of the AM263x through a 1:2 mux (SN74CB3Q3257PWR). The default I2C address of the EEPROM is set to 0x50 by pulling down the address pins A1 and A2 to ground. The Write Protect pin for the EEPROM is by default pulled down to ground and therefore disabled. There is also the option to enable Write Protect by removing the 10 kΩ pull down resistor (R273) and mounting a pull up resistor (R268) to the 3.3 V IO voltage supply.

GUID-20230515-SS0I-FKXR-MBNZ-95SDWJMHNZQC-low.png Figure 2-17 Board ID EEPROM

The GPIO Expander is used to control the select signal (I2C0_MUX_SEL) of the 1:2 Mux.

Table 2-15 EEPROM Mux Table
Select Condition Mux Function
HIGH HSEC EQEP Selected A→B2 port
LOW I2C0 Selected A→B1 port