Electronics America 8-Bit Single-Chip Microcontrollers User's Manual

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CHAPTER 16 SERIAL INTERFACE CHANNEL 0 ( µ PD78054 Subseries)
(4) Various signals
Figures 16-20 to 16-25 show various signals and flag operations in SBI. Table 16-3 lists various signals in
SBI.
Figure 16-20. RELT, CMDT, RELD, and CMDD Operations (Master)
Figure 16-21. RELT and CMDD Operations (Slave)
SCK0
SB0 (SB1)
RELT
CMDT
CMDD
RELD
SIO0
Slave address write to SIO0
(Transfer Start Instruction)
Write FFH to SIO0
(Transfer start instruction)
SIO0
SCK0
SB0 (SB1)
RELD
CMDD
Transfer start instruction
A7 A6 A1 A0
12 789
READY
A7 A6 A1 A0 ACK
Slave address
When addresses match
When addresses do not match