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Master CPU
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Caution
When replacing the master CPU/slave CPU, a pull-up resistor is necessary for the serial clock line
(SCK0) as well because serial clock line (SCK0) input/output switching is carried out asynchronously
between the master and slave CPUs.
284
CHAPTER 15 SERIAL INTERFACE CHANNEL 0 ( µ PD78014 Subseries)
Figure 15-11. Example of Serial Bus Configuration with SBI
Serial Clock
SCK0
Serial Data Bus
SB0 (SB1)
V
DD
SCK0
SB0 (SB1)
SCK0
SB0 (SB1)
SCK0
SB0 (SB1)
Slave CPU
Address 1
Slave CPU
Address 2
Slave IC
Address N
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