upd75238 Renesas Electronics Corporation., upd75238 Datasheet - Page 94
upd75238
Manufacturer Part Number
upd75238
Description
4 Bit Single-chip Microcomputer
Manufacturer
Renesas Electronics Corporation.
Datasheet
1.UPD75238.pdf
(190 pages)
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94
(a) When ACKE = 1 at time of transfer operation completion
(b) When ACKE is set after transfer operation completion
(c) When ACKE = 0 at time of transfer operation completion
(d) When ACKE = 1 period is too short
SB0/SB1
SB0/SB1
SB0/SB1
SB0/SB1
ACKE
ACKE
ACKE
ACKE
SCK0
SCK0
SCK0
SCK0
6
D2
7
D1
1
1
D7
D7
8
D0
2
2
Fig. 4-46 Operation of ACKE
D6
D6
9
D2
D2
7
7
D1
D1
When ACKE is set or cleared during this period,
and ACKE = 0 at the falling edge of SCK0
When ACKE is set during this period and ACKE = 1 at
the falling edge of the next SCK0
8
8
D0
D0
ACK
9
ACK
9
When ACKE = 1 at this point
When ACKE = 0 at this point
The ACK signal is output
during the first clock cycle
immediately after ACKT is set.
The ACK signal is not
output
The ACK signal is output
during the ninth clock
cycle
The ACK signal is not
output
PD75238
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