Thanks to Drew for sharing – more info here.
What is it?
The icehat is a small (Raspberry Pi Zero-sized) board with a Lattice ice40 Ultra FPGA and three Digilent-compatible 8-bit PMOD receptacles.
- Lattice iCE5LP4K-SG48 FPGA with
- 3520 LUTs
- 4 Multiplier/Accumulate blocks
- 20x 4kb RAMs
- OTP Non-volatile configuration memory
- 1 PLL
- 2 I2C cores
- 2 SPI cores
- 10kHz oscillator
- 48MHz oscillator
- 3 24ma OC LED drivers
- single 5V supply from RPi Header
- 3.3V 300ma regulator for FPGA I/O
- 1.2V 300ma regulator for FPGA core
- 4x Diagnostic LEDs (1 Configuration status, 3 FPGA user defined).
- 3x 12-pin Digilent-style PMOD connectors with 8 FPGA I/O each and selectable supply voltage.
- Dedicated SPI port between RPi and FPGA
- I2S between RPi and FPGA
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