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Functional Description
24.3 Functional Description
24.3.1 SPI Transmission
This section describes the transmissions supported by McSPI. The SPI protocol is a synchronous protocol
that allows a master device to initiate serial communication with a slave device. Data is exchanged
between these devices. A slave select line (SPIEN) can be used to allow selection of an individual slave
SPI device. Slave devices that are not selected do not interfere with SPI bus activities. Connected to
multiple external devices, McSPI exchanges data with a single SPI device at a time through two main
modes:
• Two data pins interface mode. (See Section 24.3.1.1)
• Single data pin interface mode (recommended for half-duplex transmission). (See Section 24.3.1.2)
The flexibility of McSPI allows exchanging data with several formats through programmable parameters
described in Section 24.3.1.3.
3997
SPRUH73H–October 2011–Revised April 2013 Multichannel Serial Port Interface (McSPI)
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