SPRUJ51 june   2023

 

  1.   1
  2. 1Abstract
  3. 2EVM Revisions and Assembly Variants
    1. 2.1 Inside the Box
    2. 2.2 EMC, EMI and ESD Compliance
  4.   Trademarks
  5. 3System Description
    1. 3.1 Key Features
      1. 3.1.1 Processor
      2. 3.1.2 Power Supply
      3. 3.1.3 Memory
      4. 3.1.4 JTAG Emulator
      5. 3.1.5 Supported Interfaces and Peripherals
      6. 3.1.6 Expansion Connectors Headers to Support Application Specific Add On Boards
    2. 3.2 Functional Block Diagram
    3. 3.3 AM62x-Low Power SK EVM Interface Mapping
    4. 3.4 Power ON OFF Procedures
      1. 3.4.1 Power-On Procedure
      2. 3.4.2 Power-Off Procedure
      3. 3.4.3 Power Test Points
    5. 3.5 Peripheral and Major Component Description
      1. 3.5.1  Clocking
      2. 3.5.2  Reset
      3. 3.5.3  OLDI Display Interface
      4. 3.5.4  CSI Interface
      5. 3.5.5  Audio Codec Interface
      6. 3.5.6  HDMI Display Interface
      7. 3.5.7  JTAG Interface
      8. 3.5.8  Test Automation Header
      9. 3.5.9  UART Interface
      10. 3.5.10 USB Interface
        1. 3.5.10.1 USB 2.0 Type A Interface
        2. 3.5.10.2 USB 2.0 Type C Interface
      11. 3.5.11 Memory Interfaces
        1. 3.5.11.1 LPDDR4 Interface
        2. 3.5.11.2 OSPI Interface
        3. 3.5.11.3 MMC Interfaces
          1. 3.5.11.3.1 MMC0 - eMMC Interface
          2. 3.5.11.3.2 MMC1 - Micro SD Interface
          3. 3.5.11.3.3 MMC2 - M2 Key E Interface
        4. 3.5.11.4 EEPROM
      12. 3.5.12 Ethernet Interface
        1. 3.5.12.1 CPSW Ethernet PHY1 Default Configuration
        2. 3.5.12.2 CPSW Ethernet PHY2 Default Configuration
      13. 3.5.13 GPIO Port Expander
      14. 3.5.14 GPIO Mapping
      15. 3.5.15 Power
        1. 3.5.15.1 Power Requirements
        2. 3.5.15.2 Power Input
        3. 3.5.15.3 Power Supply
        4. 3.5.15.4 Power Sequencing
        5. 3.5.15.5 AM62x 17x17 SoC Power
        6. 3.5.15.6 Current Monitoring
      16. 3.5.16 AM62x-Low Power SK EVM User Setup and Configuration
        1. 3.5.16.1 EVM DIP Switches
        2. 3.5.16.2 Boot Modes
        3. 3.5.16.3 User Test LEDs
      17. 3.5.17 Expansion Headers
        1. 3.5.17.1 User Expansion Connector
        2. 3.5.17.2 MCU Connector
        3. 3.5.17.3 PRU Connector
      18. 3.5.18 Push Buttons
      19. 3.5.19 I2C Address Mapping
  6. 4Known Issues and Modifications
  7. 5Revision History
  8. 6IMPORTANT NOTICE AND DISCLAIMER

3.5.13 GPIO Port Expander

The I/O Expanders are used in the AM62x-Low Power SK EVM are 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 it. 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. See the tables below for the list of signals being controlled by the Expanders.

Table 3-11 IO Expander 1 Signal Details
IO EXPANDER - 01
Pin noSIGNALDIRECTIONDEVICE
P11GPIO_EMMC_RSTNOUTPUTeMMC Reset control GPIO
P01GPIO_CPSW1_RSTOUTPUTCPSW Ethernet PHY-1 Reset Control GPIO
P00GPIO_CPSW2_RSTOUTPUTCPSW Ethernet PHY-2 Reset Control GPIO
P03MMC1_SD_ENOUTPUTSD Card Load Switch Enable
P04VPP_LDO_ENOUTPUTSOC eFuse Voltage(VPP=1.8V) Regulator Enable
P05EXP_PS_3V3_ENOUTPUTEXP CONN 3.3V Power Switch Enable
P06EXP_PS_5V0_ENOUTPUTEXP CONN 5V Power Switch Enable
P10GPIO_AUD_RSTNOUTPUTAudio Codec Reset Control GPIO
P07EXP_HAT_DETECTINPUTEXP CONN HAT Board Detection
P02PRU_DETECTINPUTPRU Board Detection
P12UART1_FET_BUF_ENOUTPUTSOC UART1 Mux Select
P13BT_UART_WAKE_SOCINPUTBT UART WKUP Signal
P14GPIO_HDMI_RSTNOUTPUTHDMI Transmitter Reset Control GPIO
P15CSI_GPIO0NARaspberry Pi Camera CSI0 GPIO1
P16CSI_GPIO1NARaspberry Pi Camera CSI0 GPIO2
P17GPIO_OLDI_INTINPUTOLDI Interrupt
P20HDMI_INTNINPUTHDMI Interrupt
P21TEST_GPIO2INPUTTEST GPIO2 from Test Automation Connector
P22MCASP1_FET_ENOUTPUTMCASP1 Enable and Direction Control
P23MCASP1_BUF_BT_ENOUTPUT
P24MCASP1_FET_SELOUTPUT
P25UART1_FET_SELOUTPUT
P27IO_EXP_TEST_LEDOUTPUTUser Test LED 2
Table 3-12 IO Expander 2 Signal Details
IO EXPANDER - 02
Pin noSIGNALDIRECTIONDEVICE
P20SPI0_FET_SELOUTPUTSoC SPI0 MUX Selection
P21SPI0_FET_OEOUTPUTSoC SPI0 MUX Enable
P22GPIO_OLDI_RSTnOUTPUTOLDI Reset
P23PRU_3V3_ENOUTPUTPRU Power Switch Enable
P26CSI_VLDO_SELOUTPUTCSI Regulator Enable (VCC_CSI_IO)
P27SOC_WLAN_SDIO_RSTOUTPUTWLAN Reset control GPIO
P10WL_LT_ENOUTPUTWilink Enable
P11CSI_RSTZOUTPUTCSI Reset control GPIO