SPRUJ51B June   2023  – August 2026

 

  1.   1
  2.   Description
  3.   Applications
  4.   Features
  5.   5
  6. 1Evaluation Module Overview
    1. 1.1 Introduction
    2. 1.2 Kit Contents
    3. 1.3 Device Information
    4. 1.4 EVM Revisions and Assembly Variants
    5. 1.5 Specification
  7. 2Hardware
    1. 2.1  Additional Images
    2. 2.2  Key Features
      1. 2.2.1 Processor
      2. 2.2.2 Memory
      3. 2.2.3 JTAG Emulator
      4. 2.2.4 Supported Interfaces and Peripherals
      5. 2.2.5 Expansion Connectors Headers to Support Application Specific Add On Boards
    3. 2.3  Power
      1. 2.3.1 Power Requirements
      2. 2.3.2 Power Input
      3. 2.3.3 Power Supply
      4. 2.3.4 Power ON OFF Procedures
        1. 2.3.4.1 Power-On Procedure
        2. 2.3.4.2 Power-Off Procedure
        3. 2.3.4.3 Power Test Points
      5. 2.3.5 Power Sequencing
      6. 2.3.6 AM62x 17x17 SoC Power
      7. 2.3.7 Current Monitoring
    4. 2.4  AM62x-Low Power SK EVM Interface Mapping
    5. 2.5  Clocking
    6. 2.6  Reset
    7. 2.7  OLDI Display Interface
    8. 2.8  CSI Interface
    9. 2.9  Audio Codec Interface
    10. 2.10 HDMI Display Interface
    11. 2.11 JTAG Interface
    12. 2.12 Test Automation Header
    13. 2.13 UART Interface
    14. 2.14 USB Interface
      1. 2.14.1 USB2.0 Type A Interface
      2. 2.14.2 USB2.0 Type-C Interface
    15. 2.15 Memory Interfaces
      1. 2.15.1 LPDDR4 Interface
      2. 2.15.2 OSPI
      3. 2.15.3 MMC Interfaces
        1. 2.15.3.1 MMC0 - eMMC Interface
        2. 2.15.3.2 MMC1 - Micro SD Interface
        3. 2.15.3.3 MMC2 - M2 Key E Interface
      4. 2.15.4 EEPROM
    16. 2.16 Ethernet Interface
      1. 2.16.1 CPSW Ethernet PHY1 Default Configuration
      2. 2.16.2 CPSW Ethernet PHY2 Default Configuration
    17. 2.17 GPIO Port Expander
    18. 2.18 GPIO Mapping
    19. 2.19 AM62x-Low Power SK EVM User Setup and Configuration
      1. 2.19.1 EVM DIP Switches
      2. 2.19.2 Boot Modes
      3. 2.19.3 User Test LEDs
    20. 2.20 Expansion Headers
      1. 2.20.1 User Expansion Connector
      2. 2.20.2 MCU Connector
      3. 2.20.3 PRU Connector
    21. 2.21 Push Buttons
    22. 2.22 I2C Address Mapping
  8. 3Hardware Design Files
  9. 4Compliance Information
    1. 4.1 EMC, EMI and ESD Compliance
  10. 5Additional Information
    1. 5.1 Known Hardware or Software Issues
      1. 5.1.1 Issue 1 – Wake-up from LPM Through MCU and WKUP UART Not Functioning
      2. 5.1.2 Issue 2 – Partial IO Low Power Mode entry/exit failure
    2.     Trademarks
    3.     75
  11. 6References
  12. 7Revision History

2.17 GPIO Port Expander

The AM62x-Low Power SK EVM uses a 24-Bit I2C based I/O expander for daughtercard plug-in detection, generating resets, and enable signals to various peripheral devices that are connected to the expander. The SoC_I2C1 bus of the AM62X 17x17 SoC is used to interface with the I/O expanders. The I2C device address of the I/O expander is 0x21 and 0x23. Table 2-17 lists the signals that the expander control.

Table 2-17 IO Expander 1 Signal Details
IO EXPANDER - 01
PIN NUMBER SIGNAL DIRECTION DEVICE
P11 GPIO_EMMC_RSTN OUTPUT eMMC Reset control GPIO
P01 GPIO_CPSW1_RST OUTPUT CPSW Ethernet PHY-1 Reset Control GPIO
P00 GPIO_CPSW2_RST OUTPUT CPSW Ethernet PHY-2 Reset Control GPIO
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 5V Power Switch Enable
P10 GPIO_AUD_RSTN OUTPUT Audio Codec Reset Control GPIO
P07 EXP_HAT_DETECT INPUT EXP CONN HAT Board Detection
P02 PRU_DETECT INPUT PRU Board Detection
P12 UART1_FET_BUF_EN OUTPUT SOC UART1 Mux Select
P13 BT_UART_WAKE_SOC INPUT BT UART WKUP Signal
P14 GPIO_HDMI_RSTN OUTPUT HDMI Transmitter Reset Control GPIO
P15 CSI_GPIO0 NA Raspberry Pi Camera CSI0 GPIO1
P16 CSI_GPIO1 NA Raspberry Pi Camera CSI0 GPIO2
P17 GPIO_OLDI_INT INPUT OLDI Interrupt
P20 HDMI_INTN INPUT HDMI Interrupt
P21 TEST_GPIO2 INPUT TEST GPIO2 from Test Automation Connector
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
P27 IO_EXP_TEST_LED OUTPUT User Test LED 2
Table 2-18 IO Expander 2 Signal Details
IO EXPANDER - 02
Pin no SIGNAL DIRECTION DEVICE
P20 SPI0_FET_SEL OUTPUT SoC SPI0 MUX Selection
P21 SPI0_FET_OE OUTPUT SoC SPI0 MUX Enable
P22 GPIO_OLDI_RSTn OUTPUT OLDI Reset
P23 PRU_3V3_EN OUTPUT PRU Power Switch Enable
P26 CSI_VLDO_SEL OUTPUT CSI Regulator Enable (VCC_CSI_IO)
P27 SOC_WLAN_SDIO_RST OUTPUT WLAN Reset control GPIO
P10 WL_LT_EN OUTPUT Wilink Enable
P11 CSI_RSTZ OUTPUT CSI Reset control GPIO