I use this library.
| CC1101 | ATmega328 | ATmega2560 | |
|---|---|---|---|
| CSN | -- | D10(*2) | D10(*2) |
| MISO | -- | D12 | D12 |
| MOSI | -- | D11(*2) | D11(*2) |
| SCK | -- | D13(*2) | D13(*2) |
| GD0 | -- | D2(*2) | D19(*2) |
| GD2 | -- | N/C | N/C |
| VCC | -- | 3.3V(*1) | 3.3V |
| GND | -- | GND | GND |
(*1)
UNO's 3.3V output can only supply 50mA.
In addition, the output current capacity of UNO-compatible devices is smaller than that of official products.
So this module may not work normally when supplied from the on-board 3v3.
(*2)
CC1101 is not 5V tolerant.
You need level shift from 5V to 3.3V.
I used this for a level shift.