SPRUJA1 October   2023

 

  1.   1
  2.   Description
  3.   Get Started
  4.   Features
  5.   5
  6. 1Evaluation Module Overview
    1. 1.1 Introduction
    2. 1.2 Kit Contents
    3. 1.3 Specification
    4. 1.4 Device Information
  7. 2Hardware
    1. 2.1  Additional Images
    2. 2.2  Key Features
      1. 2.2.1 Processor
      2. 2.2.2 Power Supply
      3. 2.2.3 Memory
      4. 2.2.4 JTAG/Emulator
      5. 2.2.5 Support Interfaces and Peripherals
      6. 2.2.6 Expansion Connectors/Headers
    3. 2.3  Interface Mapping
    4. 2.4  Power ON/OFF Procedure
      1. 2.4.1 Power ON Procedure
      2. 2.4.2 Power OFF Procedure
      3. 2.4.3 Power Test Points
    5. 2.5  Clocking
      1. 2.5.1 Peripheral Ref Clock
    6. 2.6  Reset
    7. 2.7  CSI Interface
    8. 2.8  Audio Codec Interface
    9. 2.9  HDMI Display Interface
    10. 2.10 JTAG Interface
    11. 2.11 Test Automation Header
    12. 2.12 UART Interface
    13. 2.13 USB Interface
      1. 2.13.1 USB 2.0 Type A Interface
      2. 2.13.2 USB 2.0 Type C Interface
    14. 2.14 Memory Interfaces
      1. 2.14.1 OSPI Interface
      2. 2.14.2 MMC Interfaces
        1. 2.14.2.1 MMC0 - eMMC Interface
        2. 2.14.2.2 MMC1 - Micro SD Interface
        3. 2.14.2.3 MMC2 - M.2 Key E Interface
      3. 2.14.3 Board ID EEPROM
    15. 2.15 Ethernet Interface
      1. 2.15.1 CPSW Ethernet PHY 1 Default Configuration
      2. 2.15.2 CPSW Ethernet PHY 2 Default Configuration
    16. 2.16 GPIO Port Expander
    17. 2.17 GPIO Mapping
    18. 2.18 OLDI Display Interface
    19. 2.19 Power
      1. 2.19.1 Power Requirements
      2. 2.19.2 Power Input
      3. 2.19.3 Power Supply
      4. 2.19.4 Power Sequencing
      5. 2.19.5 AM62x SIP SoC Power
      6. 2.19.6 Current Monitoring
    20. 2.20 EVM User Setup/Configuration
      1. 2.20.1 EVM DIP Switches
      2. 2.20.2 Boot Modes
      3. 2.20.3 User Test LEDs
    21. 2.21 Expansion Headers
      1. 2.21.1 PRU Connector
      2. 2.21.2 User Expansion Connector
      3. 2.21.3 MCU Connector
    22. 2.22 Interrupt
    23. 2.23 I2C Address Mapping
  8. 3Hardware Design Files
  9. 4Compliance Information
    1. 4.1 Compliance and Certifications
  10. 5Additional Information
    1. 5.1 Trademarks

2.16 GPIO Port Expander

The I/O Expander used in the AM62x SIP SK EVM is a 24-Bit I2C based I/O Expander, which is used for daughter card plug-in detection and for generating resets and enable signals to various peripheral devices connected to the I/O Expander. The SoC_I2C1 bus of the AM62x SIP SoC is used to interface with the I/O Expander. The I2C device address of the I/O Expander is 0x21. See the tables below for the list of signals being controlled by the Expander.

Table 2-8 IO Expander 1 Signal Details
Pin Number SIGNAL DIRECTION DEVICE
P00 GPIO_CPSW2_RST OUTPUT CPSW Ethernet PHY-2 Reset Control GPIO
P01 GPIO_CPSW1_RST OUTPUT CPSW Ethernet PHY-1 Reset Control GPIO
P02 PRU_DETECT INPUT PRU Board Detection
P03 MMC1_SD_EN OUTPUT SD Card Load Switch Enable
P04 VPP_LDO_EN OUTPUT SOC eFuse Voltage (VPP=1.8V) Regulator Enable
P05 EXP_PS_3V3_EN OUTPUT EXP CONN 3.3V Power Switch Enable
P06 EXP_PS_5V0_EN OUTPUT EXP CONN 5 V Power Switch Enable
P07 EXP_HAT_DETECT INPUT EXP CONN HAT Board Detection
P10 WLAN_ALERT_3V3 OUTPUT Wi-Fi card alert - M.2 module
P11 BT_UART_WAKE_SOC_3V3 INPUT BT UART WKUP Signal
P12 UART1_FET_BUF_EN OUTPUT SOC UART1 buffer enable
P13 WL_LT_EN OUTPUT Enable for Wilink Level Translators
P14 GPIO_HDMI_RSTn OUTPUT HDMI Transmitter Reset Control GPIO
P15 CSI_GPIO1 NA Raspberry Pi Camera CSI0 GPIO1
P16 CSI_GPIO2 NA Raspberry Pi Camera CSI0 GPIO2
P17 PRU_3V3_EN OUTPUT PRU Power Switch Enable
P20 HDMI_INTn INPUT HDMI Interrupt
P21 PD_I2C_IRQ INPUT Interrupt from PD controller
P22 MCASP1_FET_EN OUTPUT MCASP1 Enable and Direction Control
P23 MCASP1_BUF_BT_EN OUTPUT
P24 MCASP1_FET_SEL OUTPUT
P25 UART1_FET_SEL OUTPUT SOC UART1 FET selection
P26 TS_INT# INPUT OLDI Display Touch Interrupt
P27 IO_EXP_TEST_LED OUTPUT User Test LED 2
Table 2-9 IO Expander 2 Signal Details
Pin Number SIGNAL DIRECTION DEVICE
P0 WLAN_SDIO_RST_3V3 OUTPUT M.2 Connector SDIO Reset Control GPIO
P1 GPIO_TS_RSTn OUTPUT OLDI Display Reset control
P2 GPIO_AUD_RSTn OUTPUT Audio Codec Reset Control GPIO
P3 GPIO_eMMC_RSTn OUTPUT eMMC Reset control GPIO