Data Transmission From Slave Device To Master Device - NEC PD78056F User Manual

Master Device Processing (Receiver)
Program Processing
Hardware Operation
Transfer Line
SCK0 Pin
SB0 (SB1) Pin BUSY
Slave Device processing (Transmitter)
Program Processing
Hardware Operation
Figure 16-30. Data Transmission from Slave Device to Master Device
FFH Write
to SIO0
SCK0
Stop
1 2 3
READY D7 D6 D5
Write
to SIO0
BUSY
Clear
Serial Reception
4 5 6 7 8
D4 D3 D2 D1 D0
Data
Serial Transmission
SIO0 FFH Write
ACKT
Receive data processing
Read
to SIO0
Set
INTCSI0 ACK
Generation
Output
9
ACK BUSY
Write
to SIO0
INTCSI0
ACKD BUSY
BUSY
Output
Generation
Set Clear
Serial
Reception
1 2
D7 D6
READY