s908ey16g2vfar Freescale Semiconductor, Inc, s908ey16g2vfar Datasheet - Page 181

• Manufacturer Part Number: s908ey16g2vfar
• Description: M68hc08 Microcontrollers Microcontroller
• Manufacturer: Freescale Semiconductor, Inc

15.4 Functional Description
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. All SPI interrupts can be serviced by the CPU.
The following paragraphs describe the operation of the SPI module.
Freescale Semiconductor
SPMSTR
RECEIVER/ERROR CPU INTERRUPT REQUEST
DIVIDER
CLOCK
TRANSMITTER CPU INTERRUPT REQUEST
BUS CLOCK
shows the structure of the SPI module.
÷ 128
SPE
÷ 32
÷ 2
÷ 8
SPR1
SELECT
CLOCK
MC68HC908EY16A • MC68HC908EY8A Data Sheet, Rev. 1
SPR0
Figure 15-2. SPI Module Block Diagram
7
CONTROL
TRANSMIT DATA REGISTER
RECEIVE DATA REGISTER
6
SPI
SHIFT REGISTER
INTERNAL BUS
5
4
3
MODF
OVRF
SPRF
SPTE
SPMSTR
2
1
MODFEN
ERRIE
SPTIE
SPRIE
SPE
0
CLOCK
LOGIC
CPHA
CPOL
SPWOM
M
S
CONTROL
LOGIC
PIN
Functional Description
MISO
MOSI
SPSCK
SS
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