Datasheet

Serial Peripheral Interface (SPI)
Technical Data MC68HC908GR8 — Rev 4.0
322 Serial Peripheral Interface (SPI) MOTOROLA
20.14 I/O Registers
Three registers control and monitor SPI operation:
• SPI control register (SPCR)
• SPI status and control register (SPSCR)
• SPI data register (SPDR)
20.14.1 SPI Control Register
The SPI control register:
• Enables SPI module interrupt requests
• Configures the SPI module as master or slave
• Selects serial clock polarity and phase
• Configures the SPSCK, MOSI, and MISO pins as open-drain
outputs
• Enables the SPI module
Address: $0010
Bit 7654321Bit 0
Read:
SPRIE
DMAS
SPMSTR CPOL CPHA SPWOM SPE SPTIE
Write:
Reset:00101000
= Unimplemented
Figure 20-13. SPI Control Register (SPCR)
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cale Semiconductor,
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