Datasheet

MC68HC812A4 Data Sheet, Rev. 7
Freescale Semiconductor 179
Chapter 15
Serial Peripheral Interface (SPI)
15.1 Introduction
The serial peripheral interface (SPI) allows full-duplex, synchronous, serial communications with
peripheral devices.
15.2 Features
Features of the SPI include:
• Full-duplex operation
• Master mode and slave mode
• Programmable slave-select output option
• Programmable bidirectional data pin option
• Two flags with interrupt-generation capability:
– Transmission complete
– Mode fault
• Write collision detection
• Read data buffer
• Serial clock with programmable polarity and phase
• Reduced drive control for lower power consumption
• Programmable open-drain output option