System on Module with CrosslinkU-NX
Carrier Devkit

Schematics | Assembly

The Devkit is a carrier for the tinyCLUNX33 SoM that eases product development and debugging: A development kit usable as factory programming/test rig.


  • All SoM pins exposed, additional probing and voltage pins
  • Inexpensive 4-layer board, compact form-factor
  • USB3 at 5 Gbit/s integrated with a Type-C port controller
  • GPIO LED and push button
  • FTDI chip for JTAG, Flash SPI, UART access over USB


  • 2 × USB-C connectors for the FPGA 5 Gbit/s interfaces and FTDI debug
  • 2 × QSE expansion connectors for adapter boards (RPi FPC Camera, custom...)
  • 1 × SMA connector for the high-speed clock export
  • 4 × headers for JTAG, SPI flash, I2C, GPIO
  • Extra headers for EN signals and power rails


  • Components on one side with fewer exposed traces at the bottom
  • No-tool setup of the SoM helping factory programming
  • Mounting holes for securing the board in a rig or enclosure

Quick Start

This only applies to the latest version of the Devkit and SoM

These are the instructions to be able to quickly test the hardware, gateware, and firmware.

This assumes a command line environment: Linux terminal, Mac OSX terminal, Windows with WSL or Git Bash or OSS CAD Suite's MinGW.

# Latest number from https://github.com/tinyvision-ai-inc/tinyCLUNX33/releases
# Latest number from https://github.com/tinyvision-ai-inc/tinyclunx33_zephyr_example/releases
# check that the QE mode is "enabled"
ecpprog -tv 2>&1 | grep QE:
# Download both releases
curl -LO https://github.com/tinyvision-ai-inc/tinyCLUNX33/releases/download/$gw/tinyclunx33_rtl_reference_design.$gw.bit
curl -LO https://github.com/tinyvision-ai-inc/tinyclunx33_zephyr_example/releases/download/v0.0/tinyclunx33_zephyr_example_v0.0.bin
# Program both releases to the FPGA Flash
ecpprog -o 0x000000 tinyclunx33_rtl_reference_design.v0.1.bit
ecpprog -o 0x100000 tinyclunx33_zephyr_example_v0.0.bin

Then, unplug all USB cables to completely power off the board. Then, connect to the board using a serial console viewer, such as minicom, picocom, PuTTY, teraterm, or other tool of your preference.

The baud rate is 115200, and all other parameters might be left to default:

The serial interface is the 2nd of the FTDI, for instance, on Linux, instead of /dev/ttyUSB0, it would be /dev/ttyUSB1:

picocom -b 115200 /dev/ttyUSB1

Then, pressing "Enter" should give an access to the Zephyr shell, displaying only uart:$.


Rev Distributed Debug Plug Label on Board SYZYGY Sch Asm
v1 never micro USB none incompatible pdf pdf
v2 early users USB-C "tiny SoM Developer Kit" incompatible pdf pdf
v3 not yet USB-C TBD STD v1.1.1 pdf pdf

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