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DFR1141 Full Eval Carrier

full eval carrier cover

Introduction

This is a full-function evaluation carrier board which exposes all the pins of the LattePanda Mu compute module, providing an ideal platform for evaluating and developing each pin. With a wealth of onboard interfaces and expansion slots, it supports the connection of various peripherals and modules, greatly facilitating the testing of hardware and software and their compatibility evaluation, thus shortening the development time.

Danger

  • 🔌 Before inserting/removing the LattePanda Mu or connecting/disconnecting any type of ribbon cable and internal interface, ensure that the power is completely disconnected and wait for the power indicator light on the carrier board to turn off.
  • ❗ All pin headers operate at 3.3V levels; do NOT connect 5V peripherals.
  • 🔥 If installing high-powered expansion cards such as graphics cards into the PCIe x4 slot, verify that the power supply is sufficient.

Get Started

  1. Install the heatsink onto the LattePanda Mu.
  2. Insert the LattePanda Mu equipped with a heatsink at a 30° angle into the slot, then press down. Secure the LattePanda Mu with fixing screws.
  3. Connect the heatsink fan, eDP ribbon cable, and other internal peripherals as required.
  4. Install the RTC battery.
  5. Check DIP switch configuration as follows1
    DIP Config
  6. Connect the power supply and press the power button to start the device.

Because the RTC loses power, the initial boot may be slow and the system may automatically restart 1-2 times. Please be patient. After the first boot, as long as the RTC remains powered, the boot speed will return to normal.

Function Configuration

Enable M.2 E Key

The M.2 E Key slot is multiplexed with the second 2.5GbE NIC and disabled by default.

If you need to enable the M.2 E Key, power off first and set it up as follows:

M.2 Config

After enable M.2 E Key slot, the second 2.5GbE NIC will be disabled.

Enable SATA

Enabling SATA ports involves modifying the CPU I/O configuration, so you need to flash the BIOS of the SATA branch. The procedure is as follows

  1. Flash the SATA branch BIOS into the carrier ROM according to the carrier second BIOS flashing tutorial.
  2. Power off, switch ID_SW to SATA side
    SATA Config
  3. Installing and using SATA hard disks

Flashing Carrier's BIOS

The Full Eval Carrier is equipped with a second BIOS ROM. So you only need to flash the second BIOS on the carrier to test new functions, and avoid modifying the main BIOS on the core board.

This way, no matter what errors occur in the second BIOS, you can still boot up using the main BIOS.

  • Download flashing tool AfuWin64

  • Download BIOS version you need at BIOS repo
    If you are trying to switch to SATA branch, please download this BIOS directly

  • Unzip all the files you downloaded

  1. Switch ID_SW on CORE BIOS side to boot up, which is using the LattePanda Mu main BIOS.

  2. After entering the operating system, switch ID_SW to BOT BIOS side. The circuit is now switched to the second BIOS

  1. Open AFUWINGUIx64, select the BIOS file you need to flash, and set the flashing block as shown below
    BIOS Flash Setting

  2. After flashing, turn off, unplug the power, press and hold the power button for 10s to clear RTC and reset BIOS setting.

  3. Keep ID_SW on BOT BIOS side, plug in power supply and turn on, then the second BIOS will be used.

Note

Due to clearing RTC and resetting settings, the initial boot up may be slow and will automatically reboot several times. Please wait for the boot to complete.

USB Power Control

The USB ports on the evaluation board are controlled in two groups, allowing control over whether USB ports continue to supply power after the system is powered down.

The F_USB_PWR controls the power mode of the F_USB1 pin header

F_USB_PWR

Jumper Setting Function
jumper_12 Short 1-2 Enable USB power supply during power-on and sleep
jumper_23 Short 2-3 Always enable USB power supply

The R_USB_PWR controls the power mode for the front two USB 2.0 and four USB 3.0 ports

R_USB_PWR

Jumper Setting Function
jumper_12 Short 1-2 Enable USB power supply during power-on and sleep
jumper_23 Short 2-3 Always enable USB power supply

Auto Power-On

The auto power-on jumper enables you to set the LattePanda Mu to either automatically power on or not when power is applied.

auto power-on

Jumper Setting Function
jumper_12 Short 1-2 Enable auto power-on upon receiving power
jumper_23 Short 2-3 Disable auto power-on upon receiving power

The auto power-on function is hardware-implemented, so it is not affected by the BIOS or operating system.

Interface Pinouts

Work in progress.

Please refer to the paper manual inside the package first.

Design Documentation

Full Eval Carrier for LattePanda Mu provides full schematics and PCB drawings. You can download them at LattePanda Mu GitHub repository.


  1. Default Config: Use BIOS ROM on Mu; Enable 2nd ethernet port, PCIe x4 Slot; Disable SATA, M.2 E Key.