mc68hc08qa24 Freescale Semiconductor, Inc, mc68hc08qa24 Datasheet - Page 247

• Manufacturer Part Number: mc68hc08qa24
• Description: M68hc08 Microcontrollers
• Manufacturer: Freescale Semiconductor, Inc

MC68HC08QA24
Freescale Semiconductor
RECEIVER/ERROR CPU INTERRUPT REQUEST
SPMSTR
DIVIDER
CLOCK
TRANSMITTER CPU INTERRUPT REQUEST
BUS CLOCK
÷ 128
SPE
÷ 32
÷ 2
÷ 8
SPR1
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. All SPI interrupts can be serviced by the CPU.
The operation of the SPI module is described here.
SELECT
CLOCK
Figure 18-2. SPI Module Block Diagram
SPR0
Serial Peripheral Interface (SPI)
7
CONTROL
TRANSMIT DATA REGISTER
RECEIVE DATA REGISTER
6
SPI
SHIFT REGISTER
INTERNAL BUS
5
4
3
MODF
SPRF
OVRF
SPTE
SPMSTR
2
1
MODFEN
ERRIE
SPTIE
SPRIE
SPE
0
CLOCK
LOGIC
CPHA
CPOL
SPWOM
M
S
Serial Peripheral Interface (SPI)
CONTROL
LOGIC
PIN
MISO
MOSI
SPSCK
SS
Technical Data
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