0xCB-Helios by 0xCB-dev

The 0xCB Helios is an Elite-C compatible MicroController that is based on the RP2040

Helios has 16MB(128Mbit) of flash, Dual ARM Cortex-M0 @ 133MHz, and 264kB SRAM. It features a default off red power LED, a blue user LED, and a level-shifter to drive 5V components. Helios has an ESD protection chip onboard, supports VBUS detection for split keyboards, and you can select VBUS instead of raw for the 5V pin to hook up an external USB port with the included D+ and D- pads while maintaining ESD protection. Another huge advantage is the single button reset circuit which enables you to reset the board with a short click and enter the bootloader with a long (>500ms) click. This backwards compatiblility also enables you to use reset buttons on existing keyboards for both functions. The bootloader is unbrickable as its located in ROM on the rp2040 itself.

#mcu