SPRUJ70A January   2023  – March 2024 AM69

 

  1.   1
  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 Electrostatic Discharge (ESD) Compliance
  4. 2User Interfaces
    1. 2.1 Power Input
      1. 2.1.1 Power Input [J24] With LED for Status [LD4]
      2. 2.1.2 Power Budget Considerations
    2. 2.2 User Inputs
      1. 2.2.1 Board Configuration Settings [SW2]
      2. 2.2.2 Reset Pushbutton [SW3]
      3. 2.2.3 User Pushbutton [SW1] With User LED Indication [LD5]
    3. 2.3 Standard Interfaces
      1. 2.3.1 UART-Over-USB [J6] With LED for Status [LD1]
      2. 2.3.2 Gigabit Ethernet [J10] With Integrated LEDs for Status
      3. 2.3.3 On-Board JTAG/Emulator [J13] with optional External Interface [J15]
      4. 2.3.4 USB3.1 Gen1 Interfaces [J11] [J14]
      5. 2.3.5 Stacked DisplayPort and HDMI Type A [J16]
      6. 2.3.6 PCIe Connector [J3] for PCIe Card Modules
      7. 2.3.7 M.2 Key M Connector [J12] for SSD Modules
      8. 2.3.8 M.2 Key E Connector [J23] for Wi-Fi Networking Modules
      9. 2.3.9 MicroSD Card Cage [J32]
    4. 2.4 Expansion Interfaces
      1. 2.4.1 Heatsink [ACC] With [J22] Fan Header
      2. 2.4.2 CAN-FD Connector(s) [J4] [J5] [J8] [J9]
      3. 2.4.3 Expansion Header [J27]
      4. 2.4.4 Camera Interface, 22-Pin Flex Connectors [J1] [J2]
      5. 2.4.5 Camera Interface, 40-Pin High Speed [J31] [J30]
      6. 2.4.6 Automation and Control Connector [J17]
  5. 3Circuit Details
    1. 3.1 Top Level Diagram
    2. 3.2 Interface Mapping
    3. 3.3 I2C Address Mapping
    4. 3.4 GPIO Mapping
    5. 3.5 I2C GPIO Expander Mapping
    6. 3.6 Identification EEPROM
  6. 4Revision History

2.3.1 UART-Over-USB [J6] With LED for Status [LD1]

Four UART ports of the processor are interfaced with UART-over-USB transceiver. When the EVM’s USB micro-B connector (J6) 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
AM69 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, therefore the COM connection is not lost when the EVM power is removed. An LED [LD1] is used to indicate an active COM connection with Host-PC.