MC68HC705P9CDW FREESCALE [Freescale Semiconductor, Inc], MC68HC705P9CDW Datasheet - Page 123

• Manufacturer Part Number: MC68HC705P9CDW
• Description: Microcontrollers
• Manufacturer: FREESCALE [Freescale Semiconductor, Inc]

10.4.2 Data Movement
10.5 Timing
MC68HC705P9 — Rev. 4.0
MOTOROLA
Connecting the SIOP data register of a master MCU with the SIOP of a
slave MCU forms a 16-bit circular shift register. During an SIOP transfer,
the master shifts out the contents of its SIOP data register on its
PB5/SDO pin. At the same time, the slave MCU shifts out the contents
of its SIOP data register on its PB5/SDO pin.
master and slave exchange the contents of their data registers.
SCK
SDO
SDI
Freescale Semiconductor, Inc.
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Figure 10-4. Master/Slave SIOP Shift Register Operation
SIOP SHIFT REGISTER
t
V
MASTER MODE
Serial Input/Output Port (SIOP)
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SIOP IN
t
SCKL
MSB
t
SCK
MSB
Figure 10-5. SIOP Timing
SDO
SCK
SDI
t
HO
Figure 10-4
t
S
Serial Input/Output Port (SIOP)
SDO
SDI
SCK
VALID
DATA
BIT 1
SIOP SHIFT REGISTER
SLAVE MODE
shows how the
SIOP IN
Technical Data
t
H
Timing
LSB
123
LSB