Ackd Operations; Bsye Operation - NEC PD78052 User Manual

CHAPTER 16 SERIAL INTERFACE CHANNEL 0 ( PD78054 Subseries)
SIO0
SCK0
SB0 (SB1)
ACKD
SIO0
6
SCK0
D2
SB0 (SB1)
ACKD
(c) Clear timing when transfer start is instructed in BUSY
SIO0
SCK0 6
D2
SB0 (SB1)
ACKD
SCK0 6
SB0 (SB1) D2
BSYE
322
Figure 16-24. ACKD Operations
(a) When ACK signal is output at 9th clock of SCK0
6 7 8 9
D2 D1 D0
(b) When ACK signal is output after 9th clock of SCK0
7 8 9
D1 D0
7 8 9
D1 D0
Figure 16-25. BSYE Operation
7 8 9
D1 D0
When BSYE = 1 at this point
Transfer Start
Instruction
ACK
ACK
Transfer Start
Instruction
BUSY
ACK
ACK BUSY
If reset during this period and
BSYE = 0 at the falling edge of SCK0
Transfer Start
Transfer Start
Instruction
Transfer Start
D7 D6