MC68HC708MP16 Datasheet, PDF (254/398 Pages) Freescale Semiconductor, Inc – Microcontrollers

Serial Peripheral Interface Module (SPI)
13.5 Functional Description
Figure 13-1 shows the structure of the SPI module and Figure 13-2
shows the locations and contents of the SPI I/O registers.
INTERNAL BUS
CGMOUT ³ 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
SPRF
SPTE
OVRF
MODF
SPWOM
Figure 13-1. SPI Module Block Diagram
Technical Data
254
Serial Peripheral Interface Module (SPI)
MC68HC708MP16 — Rev. 3.1
Freescale Semiconductor