MC9S08RC8 Datasheet, PDF (166/234 Pages) Freescale Semiconductor, Inc – Microcontrollers

Serial Peripheral Interface (SPI) Module
<st-blue>
ENABLE
SPI SYSTEM
<st-blue>L
Tx BUFFER (WRITE SPI1D)
SHIFT
OUT
SPI SHIFT REGISTER
SHIFT
IN
Rx BUFFER (READ SPI1D)
SHIFT
DIRECTION
SHIFT Rx BUFFER Tx BUFFER
CLOCK
FULL
EMPTY
<st-blue>
<st-blue>
PIN CONTROL
M
S
M
S
MOSI1
(MOMI)
MISO1
(SISO)
BUS RATE
CLOCK
SPIBR
CLOCK GENERATOR
<st-blue>
MASTER/SLAVE
MODE SELECT
CLOCK
LOGIC
MODE FAULT
DETECTION
MASTER CLOCK
SLAVE CLOCK
<st-blue>
<st-blue>
M
S
MASTER/
SLAVE
SPSCK1
SS1
<st-blue>
<st-blue>
<st-blue>
<st-blue>
<st-blue>
Figure 13-3. SPI Module Block Diagram
SPI
INTERRUPT
REQUEST
MC9S08RC/RD/RE/RG Data Sheet, Rev. 1.11
166
Freescale Semiconductor