mc68hc908qb4 Freescale Semiconductor, Inc, mc68hc908qb4 Datasheet - Page 155

• Manufacturer Part Number: mc68hc908qb4
• 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:
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)
MC68HC908QB8 Data Sheet, Rev. 2
Figure 15-1
for port location
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