MC68HC812A4 Datasheet, PDF (265/342 Pages) Motorola, Inc – 16-bit device composed of standard on-chip peripheral modules connected by an intermodule bus. Modules include

15.4 Block Diagram
Serial Peripheral Interface (SPI)
Block Diagram
SPR2
SPR1
SPR0
BAUD
RATE
SELECT
P-CLOCK
CLOCK
DIVIDER
SPI
CONTROL
MSTR
CPHA
CPOL
PUPS
RDS
SWOM
SSOE
SPE
MSTR
SPC0
MODF
WCOL
SPIF
SPIE
CLOCK
LOGIC
SPI DATA REGISTER
(WRITE)
SHIFT REGISTER
SPI DATA REGISTER
(READ)
SHIFT
CONTROL
LOGIC
LSBF
INTERRUPT
REQUEST
PIN CONTROL LOGIC
PORT S DATA
DIRECTION REGISTER
PORT S DATA REG.
7654
Figure 15-1. SPI Block Diagram
MISO OR SISO
MOSI OR MOMI
SCK
SS
Advance Information
MOTOROLA
Serial Peripheral Interface (SPI)
MC68HC812A4 — Rev. 3.0
265