SPRUJ40C may   2022  – may 2023

 

  1.   1
  2.   Abstract
  3.   Trademarks
  4. 1EVM Revisions and Assembly Variants
  5. 2System Description
    1. 2.1 Key Features
      1. 2.1.1 Thermal Compliance
      2. 2.1.2 Processor
      3. 2.1.3 Power Supply
      4. 2.1.4 Memory
      5. 2.1.5 JTAG/Emulator
      6. 2.1.6 Supported Interfaces and Peripherals
      7. 2.1.7 Expansion Connectors/Headers to Support Application Specific Add‐On Boards
    2. 2.2 Functional Block Diagram (SK-AM62 and SK-AM62B)
    3. 2.3 Functional Block Diagram (SK-AM62-P1 and SK-AM62B-P1)
    4. 2.4 AM62x SKEVM Interface Mapping
    5. 2.5 Power ON/OFF Procedures
      1. 2.5.1 Power-On Procedure
      2. 2.5.2 Power-Off Procedure
      3. 2.5.3 Power Test Points
    6. 2.6 Peripheral and Major Component Description
      1. 2.6.1  Clocking
        1. 2.6.1.1 Peripheral Ref Clock
      2. 2.6.2  Reset
      3. 2.6.3  OLDI Display Interface
      4. 2.6.4  CSI Interface
      5. 2.6.5  Audio Codec Interface
      6. 2.6.6  HDMI Display Interface
      7. 2.6.7  JTAG Interface
      8. 2.6.8  Test Automation Header
      9. 2.6.9  UART Interface
      10. 2.6.10 USB Interface
        1. 2.6.10.1 USB 2.0 Type A Interface
        2. 2.6.10.2 USB 2.0 Type C Interface
      11. 2.6.11 Memory Interfaces
        1. 2.6.11.1 DDR4 Interface
        2. 2.6.11.2 OSPI Interface
        3. 2.6.11.3 MMC Interfaces
          1. 2.6.11.3.1 MMC0 - eMMC Interface
          2. 2.6.11.3.2 MMC1 - Micro SD Interface
          3. 2.6.11.3.3 MMC2 - Wilink Interface
        4. 2.6.11.4 EEPROM
      12. 2.6.12 Ethernet Interface
        1. 2.6.12.1 CPSW Ethernet PHY 2 Default Configuration
        2. 2.6.12.2 CPSW Ethernet PHY 1 Default Configuration
      13. 2.6.13 GPIO Port Expander
      14. 2.6.14 GPIO Mapping
      15. 2.6.15 Power
        1. 2.6.15.1 Power Requirements
        2. 2.6.15.2 Power Input
        3. 2.6.15.3 Power Supply
        4. 2.6.15.4 Power Sequencing
        5. 2.6.15.5 AM62x SoC Power
        6. 2.6.15.6 Current Monitoring
      16. 2.6.16 AM62x SKEVM User Setup/Configuration
        1. 2.6.16.1 EVM DIP Switches
        2. 2.6.16.2 Boot Modes
        3. 2.6.16.3 User Test LEDs
      17. 2.6.17 Expansion Headers
        1. 2.6.17.1 PRU Connector
        2. 2.6.17.2 User Expansion Connector
        3. 2.6.17.3 MCU Connector
      18. 2.6.18 Interrupt
      19. 2.6.19 I2C Address Mapping
  6. 3Known Issues and Modifications
    1. 3.1  Issue 1 - HDMI/DSS Incorrect Colors on E1
    2. 3.2  Issue 2 - J9 and J10 Header Alignment on E1
    3. 3.3  Issue 3 - USB Boot descoped on E1
    4. 3.4  Issue 4 - OLDI Connector Orientation and Pinout
    5. 3.5  Issue 5 - Bluetooth descoped on E2 EVMs
    6. 3.6  Issue 6 - Ethernet PHY CLK Skew Default Strapping Changes
    7. 3.7  Issue 7 - TEST_POWERDOWN changes
    8. 3.8  Issue 8 - MMC1_SDCD spurious interrupts
    9. 3.9  Issue 9 - PD Controller I2C2 IRQ Not Pinned Out
    10. 3.10 Issue 10 - INA Current Monitor Adress Changes
    11. 3.11 Issue 11 - Test Automation I2C Buffer Changes
  7.   Regulatory Compliance
  8.   Revision History

2.6.13 GPIO Port Expander

The I/O Expander used in the AM62x SKEVM 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 it. The SoC_I2C1 bus of the AM62x SoC is used to interface with the I/O Expander. The I2C device address of the I/O Expander is 0x22. See Table 2-10 for the list of signals being controlled by the Expander.

Table 2-10 IO Expander Signal Detail
Pin No. Signal Direction Device
P00 GPIO_CPSW2_RST OUTPUT CPSW Ethernet PHY-1 Reset Control GPIO
P01 GPIO_CPSW1_RST OUTPUT CPSW Ethernet PHY-2 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 5V Power Switch Enable
P07 EXP_HAT_DETECT INPUT EXP CONN HAT Board Detection
P10 GPIO_AUD_RSTn OUTPUT Audio Codec Reset Control GPIO
P11 GPIO_eMMC_RSTn OUTPUT eMMC Reset control GPIO
P12 UART1_FET_BUF_EN OUTPUT Enable for UART1 FET Buffer
P13 WL_LT_EN OUTPUT Enable for Wilink Level Translators
P14 GPIO_HDMI_RSTn OUTPUT HDMI Transmitter Reset Control GPIO (can also be used for OLID_RSTn with resistor stuffing change)
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 Input interrupt from the USB-C Power Delivery Controller
P22 AUD_BUF_EN OUTPUT MCASP Enable and Direction Control
P23 WL_BUF_EN OUTPUT
P24 AUD_BUFF_CLK_DIR OUTPUT
P25 UART1_FET_SEL OUTPUT
P26 TS_INT# OUTPUT OLDI Display Touch Screen Interrupt
P27 IO_EXP_TEST_LED OUTPUT GPIO used to control USED TEST LED