An extension board with iCE40UP5k for the STM32F411 "Black Pill" board.
This project is based on the icepill project by Adam Greig. Some of the footprints were also taken from the icepill project.
| iCE40 | STM32 | Notes |
|---|---|---|
| 16 | PB12 | SPI SS |
| 15 | PB13 | SPI SCK |
| 14 | PB14 | SPI MISO |
| 17 | PB15 | SPI MOSI |
| 20 | PA8 | Clock for iCE40 provided by MCO |
| 13 | PA9 | |
| 12 | PA10 | |
| 11 | PA11 | |
| 10 | PA12 | |
| 6 | PA15 | |
| 3 | PB3 | |
| 2 | PB4 | |
| 48 | PB5 | |
| 47 | PB6 | |
| 46 | PB7 | |
| 45 | PB8 | |
| 44 | PB9 | |
| 18 | PB10 | Used for IRQ |
| CRESET | PB2 | This line is pulled down by the main board |
| 25 | PB1 | |
| 26 | PB0 | |
| 27 | PA7 | |
| 28 | PA6 | |
| 34 | PA5 | |
| 35 | PA4 | |
| 36 | PA3 | |
| 37 | PA2 | |
| 38 | PA1 | |
| 42 | PA0 | Connected to a button on the main board |
| 43 | RESET |
Firmware and gateware: https://github.com/Disasm/leech-fw
This schematic and PCB design are licensed under the Creative Commons CC0 public domain dedication. It is provided with no warranty.
- First version.
- Errata:
- Drill diameter of 2.54mm connector pads is too small.