Chapter 31
Serial Peripheral Interface (SPI)
31.1 Introduction
NOTE
For the chip-specific implementation details of this module's
instances, see the chip configuration information.
The serial peripheral interface (SPI) module provides for full-duplex, synchronous, serial
communication between the MCU and peripheral devices. These peripheral devices can
include other microcontrollers, analog-to-digital converters, shift registers, sensors, and
memories, among others.
The SPI runs at a baud rate up to the SPI module clock divided by two in master mode
and up to the SPI module clock divided by four in slave mode. Software can poll the
status flags, or SPI operation can be interrupt driven.
NOTE
For the actual maximum SPI baud rate, refer to the Chip
Configuration details and to the device’s Data Sheet.
The SPI also supports a data length of 8 or 16 bits and includes a hardware match feature
for the receive data buffer.
The SPI includes an internal DMA interface to support continuous SPI transmission
through an on-chip DMA controller instead of through the CPU. This feature decreases
CPU loading, allowing CPU time to be used for other work.
31.1.1 Features
The SPI includes these distinctive features:
• Master mode or slave mode operation
MKW01Z128 MCU Reference Manual, Rev. 3, 04/2016
Freescale Semiconductor, Inc.
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