MC68HC08AZ16 Datasheet, PDF (211/527 Pages) Motorola, Inc – HCMOS Microcontroller Unit

Serial Peripheral Interface Module (SPI)
Introduction
This section describes the serial peripheral interface module (SPI,
Version C), which allows full-duplex, synchronous, serial
communications with peripheral devices.
NOTE: DMA associated functions are only valid if the MCU has a DMA module.
Features
Features of the SPI module include the following:
• 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 with CPU service:
– SPRF (SPI receiver full)
– SPTE (SPI transmitter empty)
• Mode fault error flag with CPU interrupt capability
• Overflow error flag with CPU interrupt capability
• Programmable wired-OR mode
• I²C (inter-integrated circuit) compatibility
MC68HC08AZ32
210
Serial Peripheral Interface Module (SPI)
2--spi
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