MC68HC908AP16CFA MOTOROLA [Motorola, Inc], MC68HC908AP16CFA Datasheet - Page 291
MC68HC908AP16CFA
Manufacturer Part Number
MC68HC908AP16CFA
Description
Microcontrollers
Manufacturer
MOTOROLA [Motorola, Inc]
Datasheet
1.MC68HC908AP16CFA.pdf
(440 pages)
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15.4 Functional Description
MC68HC908AP Family — Rev. 2.5
MOTOROLA
RECEIVER/ERROR CPU INTERRUPT REQUEST
TRANSMITTER CPU INTERRUPT REQUEST
SPMSTR
DIVIDER
CLOCK
CGMOUT ÷ 2
FROM SIM
÷ 128
SPE
÷ 32
÷ 2
÷ 8
Figure 15-2
The SPI module allows full-duplex, synchronous, serial communication
between the MCU and peripheral devices, including other MCUs.
Software can poll the SPI status flags or SPI operation can be interrupt-
driven.
The following paragraphs describe the operation of the SPI module.
Freescale Semiconductor, Inc.
Figure 15-2. SPI Module Block Diagram
SPR1
For More Information On This Product,
SELECT
CLOCK
RESERVED
RESERVED
SPR0
Go to: www.freescale.com
shows the structure of the SPI module.
TRANSMIT DATA REGISTER
7
RECEIVE DATA REGISTER
CONTROL
6
SPI
SHIFT REGISTER
INTERNAL BUS
5
4
3
MODF
OVRF
SPRF
SPTE
SPMSTR
2
1
MODFEN
ERRIE
SPRIE
SPTIE
SPE
CLOCK
0
LOGIC
CPHA
R
Serial Peripheral Interface Module (SPI)
CPOL
SPWOM
M
S
CONTROL
LOGIC
Functional Description
PIN
Data Sheet
MISO
MOSI
SPSCK
SS
291
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