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iCEBreaker Bitsy

Available at 1BitSquared

iCEBreaker Bitsy is the smaller but just-as-capable sibling to iCEBreaker. At just 1.4x0.7in, it is compatible with the Teensy form-factor and can be easily embedded into any project.


  • iCE40UP5K in QFN48 (SG48) package
    • PLL, two SPI and two I2C hard IPs
  • 128M (16MiB) DDR- and QPI-capable Flash Memory
  • 64M (8MiB) QPI-capable Pseudo-SRAM
  • USB-C interface (comes preloaded with a RISC-V soft USB bootloader)
  • RGB LED connected to 3x 24mA hard PWM IP pins
  • Two user LEDs (one shared with RAM-CS)
  • Status LED for CDONE
  • 12MHz external clock (on PLL GBIN)
  • One user button
  • Supply rails: 3.3V and 1.2V
  • FPGA SPI/programming header
    • 4 pins for config (SDI, SDO, SCK, CS)
    • 2 extra GPIO pins for QSPI
    • CDONE, CRESET, 3.3V, and GND
  • Teensy form-factor compatible
  • Compatible with Feather ecosystem using a Teensy 3.x Feather Adapter
  • Castellated edges and single-side-load for easy module integration

iCEBreaker-bitsy info card top iCEBreaker-bitsy info card bottom