Coral Dev Board Micro combines NXP i.MX RT1176 MCU with Edge TPU in Pi Zero form factor

Coral Dev Board Micro is the latest iteration of Google’s Edge AI devkit with an NXP i.MX RT1176 Cortex-M7/M4 crossover processor/microcontroller coupled with the company’s 4 TOPS Edge TPU, a camera, and a microphone in a board that’s about the size of a Raspberry Pi Zero SBC.

The new board follows the original NXP i.MX 8M-based Coral Dev board that was introduced in 2019, and Coral Dev Board mini based on MediaTek MT8167S processor launched in 2020, and keeps with the trend of providing more compact solutions with lower-end host processors for edge AI.

Coral Dev Board Micro

Coral Dev Board Micro specifications:

  • MCU – NXP i.MX RT1176 processor with an Arm Cortex-M7 core @ up to 1 GHz, Cortex-M4 core up to 400 MHz, 2MB internal SRAM, 2D graphics accelerators;
  • System Memory – 512 Mbit (64 MB) RAM
  • Storage – 1 Gbit (128 MB) flash memory
  • ML accelerator – Coral Edge TPU coprocessor delivering up to 4 TOPS (int8), 2 TOPS per watt
  • Camera – Built-in camera with 324 x 324 resolution
  • Audio – PDM mono microphone
  • USB – 1x USB 2.0 Type-C port
  • Expansion
    • 2x 12-pin GPIO headers
    • 2x 100-pin board-to-board connectors
  • Misc – 4x LED’s, 2x switch buttons
  • Power Supply – 5V via USB-C port
  • Dimensions – 65 x 30 mm

WiFi & Bluetooth or Ethernet and PoE can be added to the board through Coral expansion boards. There’s no documentation specific to Micro board just yet, but eventually, all resources should be provided on Coral.ai website, and I expect Tensorflow Lite for Microcontrollers to be used in this case. It’s not even clear whether the board will run the Linux-based Mendel OS or a real-time operating system. Both are possible based on the specifications.

Coral Dev Board Micro just appeared on the Coral website very recently and is currently shown as “coming soon” without pricing information, but it should be cheaper than the $100 Coral Dev Board Mini. Further details should eventually surface on the product page.

Thanks to Will Whang for the tip.

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2 Comments
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Bertrandonneur
Bertrandonneur
8 months ago

what’s the deal with those 2x 100-pin board-to-board connectors? what are those for?

Weller PCB manufacturer