NEC PD750008 User Manual
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µPD750008 USER'S MANUAL
Figure 5-64. Operation of ACKD (2/2)
(c) Clear timing for case where start of transfer is directed during BUSY
Figure 5-65. Operation of BSYE
SCK
SB0, SB1
BSYE
9
BUSY
8
7
6
ACK
When BSYE = 1 at this point
When reset operation is executed during
this period and BSYE = 0 at the falling edge
of SCK
SIO
SCK
D2 D1 D0
SB0, SB1
ACKD
9
BUSY
8
7
6
D7
ACK
Transfer start request
D6
Transfer start