Helios is a rp2040 Controller with Pro Micro compatible pinout, 16MB (128Mbit) of flash, Dual ARM Cortex-M0 @133MHz, and 264kB SRAM. Designed for use in custom mechanical (split) keyboards, but many other uses are possible. Features Pro-micro / Sparkfun RP2040 compatible footprint, with 5 extra pins at bottom (Elite-C style) Raspberry Pi RP2040 MCU Default off red power LED that you can turn on via a jumper Blue user LED Level-shifter to drive 5V components. 16MB (128Mbit) flash memory Dual ARM Cortex-M0 @133MHz 264kB SRAM User LED & USB VBUS detect Low profile USB-C mid-mount connector PCB Thickness: 1mm Programming The Helios uses a single button switch and will auto enter bootloader mode out of the packaging. In order to enter bootloader mode click and hold the reset switch with a long (>500ms) click. This backwards compatibility also enables you to use reset buttons on existing keyboards for both functions. Dimensions 34mm (H) x 18mm (W) USB Port: 3.26mm (H) PCB: 2mm (H) Includes 1 x Helios RP2040 USB Type C Controller This RP2040 controller is designed by 0xCB-dev