MC68HC908AP16CFA MOTOROLA [Motorola, Inc], MC68HC908AP16CFA Datasheet - Page 292

• Manufacturer Part Number: MC68HC908AP16CFA
• Description: Microcontrollers
• Manufacturer: MOTOROLA [Motorola, Inc]

Serial Peripheral Interface Module (SPI)
15.4.1 Master Mode
Data Sheet
292
NOTE:
The SPI operates in master mode when the SPI master bit, SPMSTR, is
set.
Configure the SPI modules as master or slave before enabling them.
Enable the master SPI before enabling the slave SPI. Disable the slave
SPI before disabling the master SPI. (See
Register.)
Only a master SPI module can initiate transmissions. Software begins
the transmission from a master SPI module by writing to the transmit
data register. If the shift register is empty, the byte immediately transfers
to the shift register, setting the SPI transmitter empty bit, SPTE. The byte
begins shifting out on the MOSI pin under the control of the serial clock.
(See
Freescale Semiconductor, Inc.
SHIFT REGISTER
For More Information On This Product,
Figure
GENERATOR
MASTER MCU
BAUD RATE
Figure 15-3. Full-Duplex Master-Slave Connections
Go to: www.freescale.com
15-3.)
MISO
MOSI
SPSCK
SS
V
DD
MC68HC908AP Family — Rev. 2.5
15.13.1 SPI Control
SPSCK
MISO
MOSI
SS
SHIFT REGISTER
SLAVE MCU
MOTOROLA