6.10.6 McSPI

The McSPI is a master/slave synchronous serial bus. There are four separate McSPI modules (McSPI1, McSPI2, McSPI3, and McSPI4) in the device. All these four modules support up to four external devices (four chip selects) and are able to work as both master and slave.

The McSPI modules include the following main features:

• Serial clock with programmable frequency, polarity, and phase for each channel
• Wide selection of McSPI word lengths, ranging from 4 to 32 bits
• Up to four master channels, or single channel in slave mode
• Master multichannel mode:
  • Full duplex/half duplex
  • Transmit-only/receive-only/transmit-and-receive modes
  • Flexible input/output (I/O) port controls per channel
  • Programmable clock granularity
  • McSPI configuration per channel. This means, clock definition, polarity enabling and word width
• Single interrupt line for multiple interrupt source events
• Power management through wake-up capabilities
• Enable the addition of a programmable start-bit for McSPI transfer per channel (start-bit mode)
• Supports start-bit write command
• Supports start-bit pause and break sequence
• Programmable timing control between chip select and external clock generation
• Built-in FIFO available for a single channel

For more information, see section Serial Peripheral Interface (McSPI) in chapter Serial Communication Interfaces of the Device TRM.