MC68HC908GZ8 Datasheet, PDF (277/344 Pages) Motorola, Inc – Microcontrollers

Serial Peripheral Interface (SPI) Module
Functional Description
INTERNAL BUS
CGMOUT ÷ 2
FROM SIM
CLOCK
DIVIDER
÷2
÷8
÷ 32
÷ 128
SPMSTR SPE
CLOCK
SELECT
SPR1 SPR0
TRANSMIT DATA REGISTER
SHIFT REGISTER
76543210
RECEIVE DATA REGISTER
CLOCK
LOGIC
PIN
CONTROL
LOGIC
M
S
SPMSTR CPHA CPOL
MISO
MOSI
SPSCK
SS
RESERVED
TRANSMITTER CPU INTERRUPT REQUEST
RESERVED
RECEIVER/ERROR CPU INTERRUPT REQUEST
SPI
CONTROL
MODFEN
ERRIE
SPTIE
SPRIE
DMAS
SPE
SPWOM
SPRF
SPTE
OVRF
MODF
Figure 21-2. SPI Module Block Diagram
MC68HC908GZ8
Freescale Semiconductor
Serial Peripheral Interface (SPI) Module
Data Sheet
277