SPRUJ68A January   2023  – October 2025

 

  1.   1
  2.   Abstract
  3.   Trademarks
  4.   4
  5. 1Introduction
    1. 1.1 Inside the Box
    2. 1.2 Key Features and Interfaces
    3. 1.3 Thermal Compliance
    4. 1.4 EMC, DMI, and ESD Compliance
  6. 2User Interfaces
    1. 2.1 Power Input
      1. 2.1.1 Power Input [J22] With LED for Status [LD2]
      2. 2.1.2 Power Budget Considerations
    2. 2.2 User Inputs
      1. 2.2.1 Board Configuration Settings [SW1]
      2. 2.2.2 Reset Power Down Pushbutton [SW2]
      3. 2.2.3 User Pushbutton [SW3] With User LED Indication [LD3]
    3. 2.3 Standard Interfaces
      1. 2.3.1 Uart-Over-USB [J4 With LED for Status [LD1]
      2. 2.3.2 Gigabit Ethernet [J8] With Integrated LEDs for Status
      3. 2.3.3 JTAG Emulation Interface [J13]
      4. 2.3.4 USB3 1 Gen1 Interfaces [J9] [J11]
      5. 2.3.5 Stacked DisplayPort and HDMI Type A [J12]
      6. 2.3.6 M 2 Key M Connector [J21] for SSD Modules
      7. 2.3.7 MicroSD Card Cage [J19]
    4. 2.4 Expansion Interfaces
      1. 2.4.1 Heatsink [ACC1] With [J15] Fan Header
      2. 2.4.2 CAN-FD Connector(s) [J1] [J2] [J5] [J6]
      3. 2.4.3 Expansion Header [J3]
      4. 2.4.4 Camera Interface 22-Pin Flex Connectors [J16][J17]
      5. 2.4.5 Camera Interface 40-Pin High Speed [J20]
      6. 2.4.6 Automation and Control Connector [J24]
  7. 3Circuit Details
    1. 3.1 Top Level Diagram
    2. 3.2 AM68 SK EVM Interface Mapping
    3. 3.3 I2C Address Mapping
    4. 3.4 GPIO Mapping
    5. 3.5 I2C GPIO Expander Table
    6. 3.6 Identification EEPROM
  8. 4Revision History

3.4 GPIO Mapping

The General Purpose IOs (GPIO) of the AM68 SoC are segmented into two major groups, WKUP and MAIN. For this design, the is no functional difference between the GPIOs. Table 3-3 describes the processor's GPIO mapping to the EVM peripherals and provides the default settings.

Table 3-3 GPIO Mapping Table
Processor Pin Name GPIO Function

Dir/

Level

 Remarks
WKUP_GPIO0_10

WKUP_GPIO0_10

ADC external trigger from TI safety header(Default

connection)/CLKREQ#

 Input

External ADC Trigger Signal
WKUP_GPIO0_11

WKUP_GPIO0_11

 40pin Expansion HeaderSignal (REFCLK0/GPIO) Output Expansion Board Specific (Pin 10)
WKUP_GPIO0_15

WKUP_GPIO0_15

 MCU SPI1 signal Output SPI chip select Signal for 40 pin Header
MCU_OSPI0_CSn1

WKUP_GPIO0_28

 Enable for eFUSE Programming Supply Output

‘0’– Disabled(Default)

‘1’– Enabled
MCU_OSPI0_CSN2

WKUP_GPIO0_29

 User LED [LD2] Output

‘0' – LED [LD2] is OFF (default)

'1' – LED [LD2] is ON
MCU_OSPI1_CLK

WKUP_GPIO0_31

 Ethernet PHY Interrupt Input

‘0’ – Active Interrupt Request

‘1’ – No Interrupt Request (default)
MCU_OSPI1_LBCLKO

WKUP_GPIO0_32

 GPIO Signals for CSI expansion connector Bi-Dir ExpansionBoard Specific (Pin 6)
MCU_OSPI1_DQS

WKUP_GPIO0_33

 SW2 Pushbutton Output

‘0’ – SW2 is Pressed

‘1’ – SW2 is NOT Pressed (default)
MCU_OSPI1_D0

WKUP_GPIO0_34

SW3 Pushbutton

 Input

‘0’ – SW3 is Pressed

‘1’ – SW3 is NOT Pressed (default)
MCU_OSPI1_D1

WKUP_GPIO0_35

40pin Expansion Header

Signal (GPIO)

 Bi-Dir ExpansionBoard Specific (Pin 22)
MCU_OSPI1_D2

WKUP_GPIO0_36

 GPIO Signals for CSI expansion connector Bi-Dir ExpansionBoard Specific (Pin 8)
MCU_OSPI1_D3

WKUP_GPIO0_37

 GPIO Signals for CSI expansion connector Bi-Dir ExpansionBoard Specific (Pin 18)
MCU_OSPI1_CSN0

WKUP_GPIO0_38

 CSI Expansion Signal (GPIO) Bi-Dir CSI2 Expansion Board Specific (Pin 20)
MCU_OSPI1_CSN1

WKUP_GPIO0_39

 Power Management IC Interrupt Input

‘0’– Active Interrupt Request

‘1’– No Interrupt Request (default)
WKUP_GPIO0_49

WKUP_GPIO0_49

40pin Expansion Header

Signal (GPIO)

 Bi-Dir Expansion Board Specific (Pin 15)
MCU_SPI0_CLK

WKUP_GPIO0_54

 MUX select Output

‘0’ – A to B1 port selected

‘1’ – A to B2 port selected
WKUP_GPIO0_56

WKUP_GPIO0_56

40pin Expansion Header

Signal (GPIO)

 Bi-Dir Expansion Board Specific (Pin 29)
WKUP_GPIO0_57

WKUP_GPIO0_57

40pin Expansion Header

Signal (GPIO)

 Bi-Dir Expansion Board Specific (Pin 31)
WKUP_GPIO0_66

WKUP_GPIO0_66

40pin Expansion Header

Signal (GPIO)

 Bi-Dir Expansion Board Specific (Pin 7)
WKUP_GPIO0_67

WKUP_GPIO0_67

40pin Expansion Header

Signal (GPIO)

 Bi-Dir Expansion Board Specific (Pin 22)
MCU_SPI0_D1

WKUP_GPIO0_69

 System Power Down Output

'0' - Normal Operation (default)

'1' - System Power Down/Off
MCU_SPI0_CS0

WKUP_GPIO0_70

Camera #1 Flex Signal

(GPIO)

 Bi-Dir Camera Specific (Pin 5a)
MCU_ADC1_AIN0 WKUP_GPIO0_79 Test Automation Interrupt #1 Input

‘0’ - To Be Defined by User

‘1’ - To Be Defined by User (default)
MCU_ADC1_AIN1 WKUP_GPIO0_80 Test Automation Interrupt #2 Input

‘0’ - To Be Defined by User

‘1’ - To Be Defined by User (default)
PMIC_POWER_EN1 WKUP_GPIO0_88

Camera #0 Flex Signal

(GPIO)

 Bi-Dir Camera Specific (Pin 5a)
EXTINTN GPIO0_0 HDMI Monitor Detect Input

Active High Signal

‘0’ – No Monitor Detected (default)

‘1’ – Monitor Detected
MCAN13_TX GPIO0_3

40pin Expansion Header

Signal (GPIO)

 Bi-Dir Expansion Board Specific (Pin 16)
MCAN1_TX GPIO0_27

40pin Expansion Header

Signal (GPIO)

 Bi-Dir Expansion Board Specific (Pin 37)
MCASP0_AXR8 GPIO0_36

40pin Expansion Header

Signal (GPIO)

 Bi-Dir Expansion Board Specific (Pin 13)
MCASP0_AXR13 GPIO0_41

40pin Expansion Header

Signal (GPIO)

 Bi-Dir Expansion Board Specific (Pin 36)
MCASP0_AXR14 GPIO0_42

40pin Expansion Header

Signal (GPIO)

 Bi-Dir Expansion Board Specific (Pin 11)
ECAP0_IN_APWM_OUT GPIO0_49

SD Card IO Voltage

Selection

 Output

‘0’ – SD Card IO Voltage is 1.8 V

‘1’ – SD Card IO Voltage is 3.3 V

(default)
TIMER_IO0 GPIO0_58 SD card detect signal Input

Active Low Signal

‘0’- SD Card Detected

‘1’- SD Card Not Detected
TIMER_IO1 GPIO0_59 USB VBUS Drive signal Output

Active High Signal

‘0’- VBUS Disabled

‘1’- VBUS Enabled