README.md
iCEBreaker Bitsy v1.0a

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.



Features


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-core 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/QPI
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





Changelog

v1.0a (2020-06-10)


Complete redesign
Pinout/dimensions now Teensy-compatible
Moved Pseudo-SRAM to the top, populate it by default