User's Manual

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µPD750008 USER'S MANUAL
Figure 5-70. Data Transfer Operation from Slave Device to Master Device
Program processing
Hardware operation
Program processing
SCK pin
123456789 12
SB0 or SB1 pin
BUSY READY D7
Hardware operation
D6 D5 D4 D3 D2 D1 D0 ACK BUSY D7 D6
READY
Data
Master device processing (receiver)
Transfer line Slave device processing (transmitter)
Write FFH to SIO
Read SIO
Set ACKT
Receive data processing
Stop SCK
Serial reception
Generate IRQCSI
Output ACK
Serial  reception
Write to SIO
Write to SIO
Clear
BUSY
Serial transmission
Generate IRQCSI
Set ACKD
Output BUSY
Clear BUSY
Write  FFH to SIO