SPRUJA2 November   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 Device Information
    4. 1.4 Specification
  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 Supported 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 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  OLDI Interface
    9. 2.9  DSI Interface
    10. 2.10 Audio Codec Interface
    11. 2.11 HDMI Display Interface
    12. 2.12 JTAG Interface
    13. 2.13 Test Automation Header
    14. 2.14 UART Interface
    15. 2.15 USB Interface
      1. 2.15.1 USB 2.0 Type A Interface
      2. 2.15.2 USB 2.0 Type C Interface
    16. 2.16 Memory Interfaces
      1. 2.16.1 LPDDR4 Interface
      2. 2.16.2 OSPI Interface
      3. 2.16.3 MMC Interfaces
        1. 2.16.3.1 MMC0 - eMMC Interface
        2. 2.16.3.2 MMC1 - Micro SD Interface
        3. 2.16.3.3 MMC2 - M.2 Key E Interface
      4. 2.16.4 Board ID EEPROM
    17. 2.17 Ethernet Interface
      1. 2.17.1 CPSW Ethernet PHY Strapping
      2. 2.17.2 CPSW Ethernet PHY1 Default Configuration
      3. 2.17.3 CPSW Ethernet PHY2 Default Configuration
    18. 2.18 GPIO Port Expander
    19. 2.19 GPIO Mapping
    20. 2.20 Power
      1. 2.20.1 Power Requirement
      2. 2.20.2 Power Input
      3. 2.20.3 Power Supply
      4. 2.20.4 Power Sequencing
      5. 2.20.5 AM62P SoC Power
      6. 2.20.6 Current Monitoring
    21. 2.21 EVM User Setup/Configuration
      1. 2.21.1 DIP Switches
      2. 2.21.2 Boot Modes
      3. 2.21.3 User Test LEDs
    22. 2.22 Expansion Headers
      1. 2.22.1 User Expansion Connector
      2. 2.22.2 MCU Connector
      3. 2.22.3 GPMC NAND (x8) Connector
    23. 2.23 Interrupt
    24. 2.24 I2C Address Mapping
  8. 3Hardware Design Files
  9. 4Compliance Information
    1. 4.1 Compliance and Certifications
  10. 5Additional Information
    1. 5.1 Known Hardware or Software Issues
      1. 5.1.1 Issue 1 - Watchdog Reset
      2. 5.1.2 Issue 2 - Power Down Sequence
    2. 5.2 Trademarks

2.18 GPIO Port Expander

The I/O Expanders used in the AM62P SK EVM are 24-Bit I2C based I/O Expander which is used for daughter cards plug-in detection and for generating resets and enable signals to various peripheral devices connected onboard. The SoC_I2C1 bus of the AM62P SOC is used to interface with the I/O Expanders. The I2C device addresses of the I/O Expanders are 0x21 and 0x23. See below tables for the list of signals being controlled by the expanders.

Table 2-10 IO Expander 1 Signal Details
Pin No. Signal Direction Purpose
P00 OLDI_INT# INPUT Interrupt from OLDI display
P01 x8_NAND_DETECT INPUT x8 NAND Card Presence Detect
P02 UART1_FET_SEL OUTPUT UART1 FET selection
P03 MMC1_SD_EN OUTPUT SD Card Load Switch Enable
P04 VPP_EN OUTPUT SOC eFuse Voltage (VPP=1.8V) Regulator Enable
P05 EXP_PS_3V3_EN OUTPUT EXP CONN 3.3V Power Switch Enable
P06 UART1_FET_BUF_EN OUTPUT SOC UART1 Mux Select
P07 EXP_HAT_DETECT INPUT EXP CONN HAT Board Detection
P10 DSI_GPIO0 BIDIRECTIONAL DSI Display GPIO0
P11 DSI_GPIO1 BIDIRECTIONAL DSI Display GPIO1
P12 OLDI_EDID INPUT OLDI to HDMI Card Device ID interrupt
P13 BT_UART_WAKE_SOC_3V3 INPUT BT UART WKUP Signal
P14 USB_TYPEA_OC_INDICATION INPUT USB Type A overcurrent indicator
P15 CSI_GPIO0 BIDIRECTIONAL CSI Camera GPIO1
P16 CSI_GPIO1 BIDIRECTIONAL CSI Camera GPIO2
P17 WLAN_ALERTn INPUT M.2 Module WLAN Alert Input
P20 HDMI_INTN INPUT HDMI Interrupt
P21 TEST_GPIO2 BIDIRECTIONAL 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 DSI_EDID INPUT DSI to HDMI Card Device ID interrupt
P26 PD_I2C_IRQ INPUT Interrupt Request from PD Controller
P27 IO_EXP_TEST_LED OUTPUT User Test LED 2
Table 2-11 IO Expander 2 Signal Details
Pin No. Signal Direction Device
P00 BT_EN_SOC OUTPUT M.2 module Bluetooth LDO Enable
P01 EXP_PS_5V0_EN OUTPUT EXP CONN 5 V power switch enable
P10 WL_LT_EN OUTPUT M.2 interface level translator enable
P20 SoC_I2C2_MCAN_SEL OUTPUT SoC I2C2 & MCAN MUX selection
P21 GPIO_HDMI_RSTn OUTPUT HDMI transmitter reset control GPIO
P22 GPIO_CPSW1_RST OUTPUT CPSW Ethernet PHY-1 reset control GPIO
P23 GPIO_CPSW2_RST OUTPUT CPSW Ethernet PHY-2 reset control GPIO
P24 GPIO_OLDI_RSTn OUTPUT OLDI display reset control GPIO
P25 GPIO_AUD_RSTn OUTPUT Audio codec reset control GPIO
P26 GPIO_eMMC_RSTn OUTPUT eMMC Reset control GPIO
P27 SOC_WLAN_SDIO_RST OUTPUT M.2 Module WLAN/SDIO Reset