MC68HC908GR4 MOTOROLA [Motorola, Inc], MC68HC908GR4 Datasheet - Page 323

• Manufacturer Part Number: MC68HC908GR4
• Description: Microcontrollers
• Manufacturer: MOTOROLA [Motorola, Inc]

MC68HC908GR8 — Rev 4.0
MOTOROLA
SPRIE — SPI Receiver Interrupt Enable Bit
DMAS —DMA Select Bit
SPMSTR — SPI Master Bit
CPOL — Clock Polarity Bit
CPHA — Clock Phase Bit
SPWOM — SPI Wired-OR Mode Bit
Freescale Semiconductor, Inc.
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.
This read only bit has no effect on this version of the SPI. This bit
always reads as a 0.
This read/write bit selects master mode operation or slave mode
operation. Reset sets the SPMSTR bit.
This read/write bit determines the logic state of the SPSCK pin
between transmissions. (See
transmit data between SPI modules, the SPI modules must have
identical CPOL values. Reset clears the CPOL bit.
This read/write bit controls the timing relationship between the serial
clock and SPI data. (See
data between SPI modules, the SPI modules must have identical
CPHA values. When CPHA = 0, the SS pin of the slave SPI module
must be set to logic 1 between bytes. See
the CPHA bit.
This read/write bit disables the pullup devices on pins SPSCK, MOSI,
and MISO so that those pins become open-drain outputs.
For More Information On This Product,
1 = SPRF CPU interrupt requests enabled
0 = SPRF CPU interrupt requests disabled
0 = SPRF DMA and SPTE DMA service requests disabled
1 = Master mode
0 = Slave mode
1 = Wired-OR SPSCK, MOSI, and MISO pins
0 = Normal push-pull SPSCK, MOSI, and MISO pins
(SPRF CPU and SPTE CPU interrupt requests enabled)
Serial Peripheral Interface (SPI)
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Figure 20-4
Figure 20-4
and
and
Serial Peripheral Interface (SPI)
Figure
Figure
Figure
20-6.) To transmit
20-12. Reset sets
20-6.) To
Technical Data
I/O Registers
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