MC9S12G FREESCALE [Freescale Semiconductor, Inc], MC9S12G Datasheet - Page 605

• Manufacturer Part Number: MC9S12G
• Description: Ignores external trigger. Performs one conversion sequence and stops.
• Manufacturer: FREESCALE [Freescale Semiconductor, Inc]

19.2
This section lists the name and description of all ports including inputs and outputs that do, or may, connect
off chip. The SPI module has a total of four external pins.
19.2.1
This pin is used to transmit data out of the SPI module when it is configured as a master and receive data
when it is configured as slave.
Freescale Semiconductor
Bus Clock
This document is valid for the S12G96 and the S12G128 device. All information related to other devices is preliminary.
Interrupt
Request
SPI
External Signal Description
MOSI — Master Out/Slave In Pin
SPPR
SPI
SPI Baud Rate Register
Prescaler
SPI Control Register 1
SPI Control Register 2
Baud Rate Generator
SPI Status Register
SPI Data Register
Interrupt Control
SPIF
3
SPR
MODF
Clock Select
Counter
SPTEF
MC9S12G Family Reference Manual, Rev.1.01
3
Figure 19-1. SPI Block Diagram
Baud Rate
LSBFE=1
LSBFE=0
Control
Control
Master
Slave
Master Baud Rate
Slave Baud Rate
MSB
2
2
Shifter
LSBFE=1
LSBFE=0
LSBFE=0
LSBFE=1
CPOL
Clock
Shift
Phase +
Polarity
Control
Phase +
Polarity
Control
LSB
CPHA
BIDIROE
SPC0
Sample
Clock
Data Out
SCK In
SCK Out
Data In
Serial Peripheral Interface (S12SPIV5)
Control
Logic
Port
MOSI
SCK
SS
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