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Welcome to Retro Watch Company WiKi


Developer Portal (getting started)

Hardware Design

Main CPU:

  1. Nordic nRF5340 128/64 MHz Arm Cortex-M33 application processor with 1 MB Flash & 512 KB RAM
  2. 64 MHz Arm Cortex-M33 ultra low power network processor with 256 KB Flash & 64 KB RAM
  3. Bluetooth Low Energy
  4. Bluetooth Direction Finding
  5. Bluetooth mesh, Thread, Zigbee

Graphics Processor:

  1. Efinix T20 FPGA with capabilities similar to Super Nintendo and Gameboy Advance
  2. 128KB of ram
  3. 20K Logic elements
  4. 4 background layers with 16/256 colors per 8×8 tile + an overlay layer for smart watch features
  5. 256 sprites
  6. Hardware scaling and rotation of sprites and backgrounds
  7. Translucency


  1. 1.54“ 60hz 240×240 (or 320×320)
  2. screen is driven by the MCU when in watch mode and by the FPGA when in game mode

Smart Watch Features:

  1. Notifications/vibrations
  2. Pedometer
  3. Compass
  4. Microphone and Speaker
  5. Ambient Light Sensor
  6. User apps

start.txt · Last modified: 2021/11/17 14:21 by jason

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