NEC uPD78056Y - Manual (Page 330)

330
CHAPTER 16 SERIAL INTERFACE CHANNEL 0 (
µ
PD78054 Subseries)
Figure 16-30. Data Transmission from Slave Device to Master 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 Reception
INTCSI0
Generation
ACK
Output
Serial
Reception
Hardware Operation
Program Processing
INTCSI0
Generation
ACKD
Set
Hardware Operation
FFH Write
to SIO0
Master Device Processing (Receiver)
Transfer Line
Slave Device processing (Transmitter)
Serial Transmission BUSY
Output
READY
Data
BUSY
Clear
Write
to SIO0
SCK0
Stop
BUSY
Clear
1 2
READY BUSY D7 D6
ACKT
Set
SIO0
Read
Receive data processing
FFH Write
to SIO0
Write
to SIO0