TypixDeck is a pocket-sized cyberdeck designed from
scratch -- schematic, PCB layout, firmware, and mechanical shell. Not a
Raspberry Pi bolted into an off-the-shelf case.

## The stack

Three boards connected by FPC, no bulky connectors:

- Core Board -- Raspberry Pi CM4/CM5 on SODIMM, ESP32-S3 co-processor,
USB2514B 4-port hub, TPS61088 boost, INA219 x2 + MAX17048 power telemetry,
M.2 2230 NVMe slot
- Keyboard Board -- STM32F042 running a 6x13 matrix, 1.47" status LCD
(JD9853A), rotary encoder, PWM backlight
- Screen/Audio Board -- SSS1629A5 USB audio codec, APA2068 + PAM8406 amps,
stereo MEMS mics

Main display: 3.2" 1024x768 panel (JD9168S) over DPI, GT911 capacitive
multitouch.

## The interesting part: a discrete RGB DPI bus MUX

The CM and the ESP32-S3 both drive the *same* parallel RGB panel. The ESP32
paints a boot screen before Linux is up, then hands the bus over once the Pi
takes control.