NEC 78014Y Series User Manual page 366

Figure 16-29. Address Transmission from Master Device to Slave Device (WUP = 1)
Master Device Processing (Transmitter)
CMDT
Program Processing
Set
Hardware Operation
Transfer Line
SCK0 Pin
SB0 (SB1) Pin
Slave Device Processing (Receiver)
Program Processing
Hardware Operation
Write
RELT CMDT
Set Set
to SIO0
Serial Transmission
1 2 3 4
A7 A6 A5
Address
CMDD CMDD CMDD
Serial Reception
Set Clear Set
RELD
Set
INTCSI0
Generation
5 6 7 8 9
A4 A3 A2 A1 A0
INTCSI0
Generation
(When SVA = SIO0)
Interrupt Servicing
(Preparation for the Next Serial Transfer)
ACKD SCK0
Set
Stop
ACK BUSY READY
WUP←0 ACKT
BUSY
Set
Clear
ACK BUSY BUSY
Output Output Clear