s908qc16vdse Freescale Semiconductor, Inc, s908qc16vdse Datasheet - Page 169

• Manufacturer Part Number: s908qc16vdse
• Description: M68hc08 Microcontrollers
• Manufacturer: Freescale Semiconductor, Inc

Chapter 15
Serial Peripheral Interface (SPI) Module
15.1 Introduction
This section describes the serial peripheral interface (SPI) module, which allows full-duplex,
synchronous, serial communications with peripheral devices.
The SPI shares its pins with general-purpose input/output (I/O) port pins. See
of these shared pins.
15.2 Features
Features of the SPI module include:
15.3 Functional Description
The SPI module allows full-duplex, synchronous, serial communication between the MCU and peripheral
devices, including other MCUs. Software can poll the SPI status flags or SPI operation can be interrupt
driven.
The following paragraphs describe the operation of the SPI module.
Freescale Semiconductor
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Full-duplex operation
Master and slave modes
Double-buffered operation with separate transmit and receive registers
Four master mode frequencies (maximum = bus frequency ÷ 2)
Maximum slave mode frequency = bus frequency
Serial clock with programmable polarity and phase
Two separately enabled interrupts:
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Mode fault error flag with interrupt capability
Overflow error flag with interrupt capability
Programmable wired-OR mode
SPRF (SPI receiver full)
SPTE (SPI transmitter empty)
MC68HC908QC16 • MC68HC908QC8 • MC68HC908QC4 Data Sheet, Rev. 4
Figure 15-1
for port location
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