Datasheet

Serial Peripheral Interface (SPI)
MC68HC812A4 Data Sheet, Rev. 7
180 Freescale Semiconductor
15.3 Block Diagram
Figure 15-1. SPI Block Diagram
MOSI OR MOMI
MISO OR SISO
SCK
SS
INTERRUPT
BAUD
RATE
DIVIDER
CLOCK
CLOCK
LOGIC
CPHA
CPOL
SPI
LSBF
SSOE
SWOM
MODF
WCOL
SPIF
SPC0
RDS
SPE
MSTR
CONTROL
PUPS
SPR0
SPR2
SPR1
P-CLOCK
SHIFT REGISTER
PORT S DATA
DIRECTION REGISTER
PORT S DATA REGISTER
7
SPIE
MSTR
REQUEST
654
SHIFT
CONTROL
LOGIC
SPI DATA REGISTER
(WRITE)
SPI DATA REGISTER
(READ)
SELECT
PIN CONTROL LOGIC