Acke Operations - NEC PD78076 User Manual

Pd78078 series; pd78078y series 8-bit single-chip microcontrollers
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CHAPTER 17 SERIAL INTERFACE CHANNEL 0 ( PD78078 SUBSERIES)
SCK0
SB0 (SB1)
ACKE
SCK0
6
SB0 (SB1)
D2
ACKE
SCK0
SB0 (SB1)
ACKE
SCK0
SB0 (SB1)
D2
ACKE
346
Figure 17-23. ACKE Operations
(a) When ACKE = 1 upon completion of transfer
1
2
7
D7
D6
D2
(b) When set after completion of transfer
7
8
9
D1
D0
(c) When ACKE = 0 upon completion of transfer
1
2
7
D7
D6
D2
(d) When "ACKE = 1" period is short
D1
D0
8
9
ACK signal is output
D1
D0
ACK
at 9th clock
When ACKE = 1 at this point
ACK
ACK signal is output for
a period of one clock
just after setting
If set during this period and ACKE = 1
at the falling edge of the next SCK0
8
9
ACK signal is not output
D1
D0
When ACKE = 0 at this point
ACK signal is not output
If set and cleared during this period
and ACKE = 0 at the falling edge of SCK0

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