NEC 78014Y Series User Manual page 288

(c) Address
The address is 8-bit data that the master outputs to the slave connected to the bus line to select a specific
slave.
8-bit data following the bus release signal and the command signal is defined as the address. The slave
detects the condition and checks by hardware if 8-bit data matches its specified number (the slave address).
When 8-bit data matches the slave address, which means the slave is selected, the slave communicates
with the master until the master instructs disconnection.
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CHAPTER 15 SERIAL INTERFACE CHANNEL 0 ( µ PD78014 Subseries)
Figure 15-15. Address
SCK0
SB0 (SB1)
Bus Release Signal
Command Signal
Figure 15-16. Slave Selection with Address
Master
Slave 2
Address Transmission
1 2 3 4 5 6
A7 A6 A5 A4 A3 A2
Address
Slave 1
Slave 2
Slave 3
Slave 4
7 8
A1 A0
Non-Selection
Selection
Non-Selection
Non-Selection