ZERO SOM/ZERO Hardware/Peripherals/SPI
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Peripheral SPI[edit | edit source]
The Serial Peripheral Interface (SPI) module in the ZERO SOM provides 4 SPI channels.
Description[edit | edit source]
Each SPI channel has the following features:
- SPI transfer facility
- Using MOSI, MISO, SSL and RSPCK (SPI clock) signals enables SPI serial transfer (four lines) or clock-synchronous operation (three lines) capable of handling serial transfer as a master or slave
- Data formats
- Switching between MSB first and LSB first
- Transfer bit length selectable to 4 - 32 bits
- 32 bits × 4-stage FIFO transmit and receive buffers
- Up to four frames can be transmitted or received in a single transfer operation (with each frame having up to 32 bits)
- RSPCK can be stopped automatically when the reception buffer is full for master reception
