s908ab32ag0cfue Freescale Semiconductor, Inc, s908ab32ag0cfue Datasheet - Page 282

• Manufacturer Part Number: s908ab32ag0cfue
• Description: M68hc08 Microcontrollers
• Manufacturer: Freescale Semiconductor, Inc

Serial Peripheral Interface Module (SPI)
Technical Data
282
RECEIVER/ERROR CPU INTERRUPT REQUEST
TRANSMITTER CPU INTERRUPT REQUEST
SPMSTR
DIVIDER
CLOCK
CGMOUT ÷ 2
FROM SIM
÷ 128
SPE
÷ 32
÷ 2
÷ 8
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.
SPR1
Figure 16-2. SPI Module Block Diagram
SELECT
CLOCK
RESERVED
RESERVED
Serial Peripheral Interface Module (SPI)
SPR0
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
SPTIE
SPRIE
SPE
CLOCK
0
LOGIC
CPHA
R
CPOL
SPWOM
MC68HC908AB32
M
S
CONTROL
Freescale Semiconductor
LOGIC
PIN
MISO
MOSI
SPSCK
SS
—
Rev. 1.1