NEC uPD78056Y - Manual (Page 329)

329
CHAPTER 16 SERIAL INTERFACE CHANNEL 0 (
µ
PD78054 Subseries)
Figure 16-29. Data Transmission from Master Device to Slave Device
1 2 3 4 5 6 7 8 9 SCK0 Pin
D7 D6 D5 D4 D3 D2 D1 D0 ACK BUSY SB0 (SB1) Pin
Program Processing
Serial Transmission
INTCSI0
Generation
ACKD
Set
SCK0
Stop
Hardware Operation
ACKT
Set
Program Processing
INTCSI0
Generation
ACK
Output
Hardware Operation
Write
to SIO0
Interrupt Servicing
(Preparation for the Next Serial Transfer)
Master Device Processing (Transmitter)
Transfer Line
Slave Device Processing (Receiver)
Serial Reception
BUSY
Output
READY
Data
BUSY
Clear
BUSY
Clear
SIO0
Read