SPRUJ68 January   2023 AM68

 

  1.   Abstract
  2.   Trademarks
  3. 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
  4. 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]
  5. 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
  6. 4Revision History

2.3.1 Uart-Over-USB [J4 With LED for Status [LD1]

Four UART ports of the processor are interfaced with UART-over-USB transceiver on the EVM. When the EVM’s USB micro-B connector (J4) is connected to a Host-PC using supplied USB cable (Type-A to Micro-B), the computer can establish Virtual Com Port(s) which can be used with any terminal emulation application. Virtual Com Port drivers for the transceiver (CP2108-B02-GM) can be obtained fromhttps://www.silabs.com/developers/usb-touart-bridge-vcp-drivers.

Once installed, the Host-PC will create four Virtual Com Ports. Depending on the other Host-PC resources available - the Virtual COM Ports not be located at COM1-4. However, they will remain in the same numerical order.

Table 2-4 UART to COM Port Mapping
TDA4VE UART Host-PC COM Port
WKUP_UART0 COM 1
MCU_UART0 COM 2
UART8 COM 3
UART2 COM 4

The circuit is powered through BUS power and therefore the COM connection not be lost when the EVM power is removed. An LED [LD1] is used to indicate an active COM connection with Host-PC.