290
µ
PD78214 Sub-Series
Fig. 10-29 Sending Data from Master Device to Slave Device
Program processing
Hardware operation
Program processing
SCK pin 12345678
SB0 pin D7
Hardware operation
D6 D5 D4 D3 D2 D1 D0 ACK READY
Data
Master device processing (transmitter)
Transfer line
Slave device processing (receiver)
Interrupt handling (preparation for next serial transfer)
Serial transmission
Generate
INTCSI
Serial reception
Generate
INTCSI
BUSY
Write
to SIO
Set
ACKD
Stop
SCK
Read
SIO
Set
ACKT
Clear
BUSY
Output
BUSY
Output
ACK
Clear
BUSY
Remark This timing is valid only under the following conditions:
The master is only allowed to transmit data.
The slave is only allowed to receive data.
ACKE is set to 0 and BSYE is set to 1.