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city42

A pre-built, low profile, unibody split keyboard based on the RP2040 processor

Keyboard Maintainer: Kevin Gee
Hardware Supported: city42 split unibody ergonomic keyboard
Hardware Availability: Controller Works Retail Site Hardware is available as pre-built units only. Make example for this keyboard (after setting up your build environment):

    make controllerworks/city42:default

Flashing example for this keyboard:

    make controllerworks/city42:default:flash

See the build environment setup and the make instructions for more information. Brand new to QMK? Start with our Complete Newbs Guide.

Features

Highly integrated design with microcontroller and USB connectors on the main board
RP2040 processor by Raspberry Pi Foundation running at 130 MHz with 16MB flash memory
40mm Cirque trackpad
42 per-key RGB LEDs
ESD and over-current protection on USB
Reset and boot tactile switches
USB C host connection
Hot swap connectors for Kailh Chocolate PG1350 switches
Chocolate key spacing (18mm horizontal x 17mm vertical)

Bootloader

Enter the bootloader in 3 ways:

Bootmagic reset: Hold down the upper left key while plugging in USB
Physical reset button: Press the RST button twice, rapidly
Keycode in layout: Press the key mapped to QK_BOOT if it is available