MC68HC908GP32 Datasheet, PDF (330/410 Pages) Motorola, Inc – M68HC08 Family of 8-bit microcontroller units (MCUs)

Freescale Semiconductor, Inc.
Serial Peripheral Interface Module (SPI)
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 7
6
5
4
3
2
1
Read:
DMAS
SPRIE
SPMSTR CPOL CPHA SPWOM SPE
Write:
Reset: 0
0
1
0
1
0
0
= Unimplemented
Figure 20-13. SPI Control Register (SPCR)
Bit 0
SPTIE
0
SPRIE — SPI Receiver Interrupt Enable Bit
This read/write bit enables CPU interrupt requests generated by the
SPRF bit. The SPRF bit is set when a byte transfers from the shift
register to the receive data register. Reset clears the SPRIE bit.
1 = SPRF CPU interrupt requests enabled
0 = SPRF CPU interrupt requests disabled
Technical Data
328
MC68HC908GP32•MC68HC08GP32 — Rev. 6
Serial Peripheral Interface Module (SPI)
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