IC Package: 32 pin MLF
| Arduino Pin # | ATMEL 328P (MLF) pin# | ATMEL 328P (PDIP) pin# | Label | Function |
|---|---|---|---|---|
| D10 | 14 | 16 | PB2 | SS* |
| D11 | 15 | 17 | PB3 | MOSI |
| D12 | 16 | 18 | PB4 | MISO |
| D13 | 17 | 19 | PB5 | SCK |
The problem is, according to Arduino Nano schematic, pin 13 is connected to LED through 330 ohm resistor in series.
To be able to use SPI correctly, we need to disconnect the LED.
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