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Ondřej Hruška
b30fcdec13
|
7 years ago | |
|---|---|---|
| .. | ||
| rev.1 | 7 years ago | |
| README.md | 7 years ago | |
| gzb.png | 7 years ago | |
| gzrender.png | 7 years ago | |
| gztop.png | 7 years ago | |
README.md
GEX Zero
This form factor is designed to be mechanically compatible with the Raspberry Pi Zero (W). This makes it possible to use PHATs and cases for the Pi Zero.
Pins are mapped to the 20x2 header to maximize compatibility with PHATS. Functions like UART, SPI and I2C should all be available.
Pin mapping
Main header
3V3 1 | 2 5V
PB7 3 | 4 5V
PB6 5 | 6 GND
PA8 7 | 8 PB10
GND 9 | 10 PB11
PB1 11 | 12 PB8
PA10 13 | 14 GND
PB9 15 | 16 PA0
3V3 17 | 18 PA1
PB5 19 | 20 GND
PB4 21 | 22 PA2
PB3 23 | 24 PA3
GND 25 | 26 PA4
PB2 27 | 28 PA5
PC10 29 | 30 GND
PC11 31 | 32 PA7
PB0 33 | 34 GND
PB15 35 | 36 PA6
PB12 37 | 38 PB14
GND 39 | 40 PB13
Small header
GND, Debug TX (PA9), PA13, PA14 (SWD)
Radio interface
This board has a position for NRF24L01+.
The radio module uses one of the SPI ports as alternate functions on some otherwise unused PC pins. PB12 and PB14 can only be used as regular GPIO when the radio link is enabled, not SPI. PB13 must be left unconnected, as there is no available remap for the clock line.
The radio module is used for remote control with the GEX Dongle and provides a fast, half duplex connection.