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Figure 13-9. Example of Serial Bus Configuration with SBI
Master CPU
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.
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CHAPTER 13 SERIAL INTERFACE CHANNEL 0
Serial clock
SCK0
Serial data bus
SB0 (SB1)
User's Manual U11302EJ4V0UM
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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