mc9s12xd256 Freescale Semiconductor, Inc, mc9s12xd256 Datasheet - Page 515

• Manufacturer Part Number: mc9s12xd256
• Description: Hcs12x Microcontrollers
• Manufacturer: Freescale Semiconductor, Inc

Chapter 12
Serial Peripheral Interface (S12SPIV4)
12.1
The SPI module allows a duplex, synchronous, serial communication between the MCU and peripheral
devices. Software can poll the SPI status flags or the SPI operation can be interrupt driven.
12.1.1
12.1.2
The SPI includes these distinctive features:
12.1.3
The SPI functions in three modes: run, wait, and stop.
Freescale Semiconductor
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Master mode and slave mode
Bidirectional mode
Slave select output
Mode fault error flag with CPU interrupt capability
Double-buffered data register
Serial clock with programmable polarity and phase
Control of SPI operation during wait mode
Run mode
This is the basic mode of operation.
Wait mode
Introduction
Glossary of Terms
Features
Modes of Operation
MOMI
MOSI
MISO
SISO
SCK
SPI
SS
Serial Peripheral Interface
Slave Select
Serial Clock
Master Output, Slave Input
Master Input, Slave Output
Master Output, Master Input
Slave Input, Slave Output
MC9S12XDP512 Data Sheet, Rev. 2.17
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