NEC PD75402A - Manual (Page 126)

115
CHAPTER 5. PERIPHERAL HARDWARE FUNCTIONS
Fig. 5-50 Command Transmission from Master Device to Slave Device
IRQCSI
Genera-
tion ACKD
Setting
SCK
Stop-
page
CMDD
Setting
IRQCSI
Genera-
tion ACK
Output BUSY
Output
Serial Receive Operation
BUSY
Clear-
ance
1 2 3 4 5 6 7 8 9
C7 C6 C5 C4 C3 C2 C1 C0
Command
Hardware
Operation
Program
Processing
Slave Device Processing Reception Side)
SB0 Pin
SCK Pin
Transfer Line
Hardware
Operation
Program
Processing
Master Device Processing Transmission Side)
CMDT
Setting Write
to SIO
Serial Transmit Operation
SIO
Read
Command
Analysis ACKT
Setting BUSY
Clear-
ance
READY BUSY ACK
Interrupt Servicing
(Preparation for Next Serial Transfer)