NEC uPD78056Y - Manual (Page 321)

321
CHAPTER 16 SERIAL INTERFACE CHANNEL 0 (
µ
PD78054 Subseries)
Figure 16-23. ACKE Operations
(a) When ACKE = 1 upon completion of transfer
(b) When set after completion of transfer
(c) When ACKE = 0 upon completion of transfer
(d) When “ACKE = 1” period is short
SB0 (SB1)
ACKE
1 2 7 8 9
D7 D6 D2 D1 D0 ACK
When ACKE = 1 at this point
ACK signal is output
at 9th clock
SCK0
SB0 (SB1)
ACKE
7 8 9
D1 D0 ACK
6
D2
If set during this period and ACKE = 1
at the falling edge of the next SCK0
ACK signal is output for
a period of one clock
just after setting
SCK0
SB0 (SB1)
ACKE
1 2 7 8 9
D7 D6 D2 D1 D0
When ACKE = 0 at this point
ACK signal is not output
SCK0
SB0 (SB1)
ACKE
If set and cleared during this period
and ACKE = 0 at the falling edge of SCK0
ACK signal is not output D2 D1 D0
SCK0