S9S08SL8F1CTJ Datasheet, PDF (231/356 Pages) Freescale Semiconductor, Inc – provides the functional version of the on-chip modules

Chapter 13
Serial Peripheral Interface (S08SPIV3)
13.1 Introduction
The serial peripheral interface (SPI) module provides 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, memories, and so forth.
The maximum SPI baud rate depends on the operating mode:
• Master mode — bus clock divided by two
• Slave mode — bus clock divided by four
The SPI operation can be driven by interrupts or software can poll the status flags.
All devices in the MC9S08EL32 Series and MC9S08SL16 Series MCUs contain one SPI module
Figure 13-1 highlights the SPI module.
MC9S08EL32 Series and MC9S08SL16 Series Data Sheet, Rev. 3
Freescale Semiconductor
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