MC9S08SH32CWL Datasheet, PDF (223/328 Pages) Freescale Semiconductor, Inc – MC9S08SH32 Series Features

Chapter 15
Serial Peripheral Interface (S08SPIV3)
15.1 Introduction
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, memories, and so forth.
The SPI runs at a baud rate up to that of the bus clock divided by two in master mode and bus clock divided
by four in slave mode. The SPI operation can be interrupt driven or software can poll the status flags.
All devices in the MC9S08SH32 Series MCUs contain one SPI module, as shown in the following block
diagram. Figure 15-1 shows the MC9S08SH32 Series block diagram with the SPI modules highlighted.
MC9S08SH32 Series Data Sheet, Rev. 2
Freescale Semiconductor
223
PRELIMINARY