NEC PD78214 - Manual (Page 311)

282
µ
PD78214 Sub-Series
(d) When ACKE is set to 1 for a short period of time
Fig. 10-25 ACKD Operations
(a) When the ACK signal is output during the ninth cycle of the SCK clock
SCK
SB0
ACKE
The ACK signal is not
output
When ACKE is set or cleared during this period,
and ACKE = 0 at the falling edge of SCK
D2 D1 D0
SIO
SCK 9 8
D2 D1 D0 SB0
ACKD
7 6
ACK
Transfer start request
Transfer operation start
D7 D6
(b) When the ACK signal is output after the ninth pulse of the SCK clock
SIO
SCK
D2 D1 D0 SB0
ACKD
9
ACK
8 7 6
Transfer start request
Transfer operation start
D7 D6
(c) Clear timing when a transfer start is specified in the busy state
SIO
SCK
D2 D1 D0 SB0
ACKD
9
BUSY
8 7 6
D7 ACK
Transfer start request
D6