Silicognition M4-Shim - Feather M4 That fits on top of The PoE-FeatherWing for Ultra-Compact PoE Builds (Horizontal USB)

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Silicognition M4-Shim - Feather M4 That fits on top Features

• Electrical clone of Feather M4, optimized for use with PoE-FeatherWing

• Powered by the ATSAMD51J19 - 120MHz Cortex M4 with floating point support, 512KB of flash and 192KB of RAM

• Includes 2 MB SPI flash for CircuitPython support

• UF2 bootloader for easy Arduino and CircuitPython compatibility

• CircuitPython with W5500 driver pre-installed to ease integration with PoE-FeatherWing

• Two USB variants: horizontal or vertical Micro-B USB

About Silicognition M4-Shim - Feather M4 That Fits On Top

This board is a electrically a clone of the Feather M4 Express, but physically optimized to fit on top of the Silicognition PoE FeatherWing, filling the empty space around the RJ45 and flyback transformer and allowing the creation of extremely compact Power over Ethernet systems. Just like the original Feather M4 Express, it is powered by the ATSAMD51J19 with its 120MHz Cortex M4 with floating point support, 512KB of flash and 192KB of RAM. It also has 2MB of SPI flash on board, which contains the CircuitPython file system by default. The only thing missing compared to the original Feather is the battery charger, which was deemed expendable for Power over Ethernet systems. The board comes with a UF2 bootloader for easy Arduino and CircuitPython compatibility, and has CircuitPython with Wiznet W5500 drivers pre installed, plus a quick example module that sets the Ethernet connection up for you when used with the PoE FeatherWing! There is one option with horizontal USB connector, it has the micro USB in the same place as a normal Feather would have it: facing the opposite direction from the Ethernet jack when mounted on a PoE FeatherWing. The other option has a vertical USB connector, facing up from the board. It is intended to be used in systems that stack 3 boards: PoE FeatherWing on the bottom, an application specific board in the middle (which can have its own connectors facing the opposite direction from the Ethernet jack) and the M4 Shim on top, with the USB facing up. A 3 PCB stack would not work well with the standard USB direction: if the M4 Shim's USB faces the same way as the connectors on the application specific board, they would likely interfere with each other. By facing the USB up, it continues to be easily accessible from the top, no matter what the application board in the middle looks like. The whole M4 Shim user interface (button, USB, LEDs) is also nicely clustered together.