MC908GR8CDWE Datasheet, PDF (322/408 Pages) Freescale Semiconductor, Inc – M68HC08 Microcontrollers

Freescale Semiconductor, Inc.
Serial Peripheral Interface (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:
SPRIE
Write:
DMAS
SPMSTR CPOL
CPHA SPWOM SPE
Reset: 0
0
1
0
1
0
0
= Unimplemented
Figure 20-13. SPI Control Register (SPCR)
Bit 0
SPTIE
0
Technical Data
322
MC68HC908GR8 — Rev 4.0
Serial Peripheral Interface (SPI)
For More Information On This Product,
Go to: www.freescale.com
MOTOROLA