Epson RTC-72423 Manuel D’Utilisation
RTC - 72421 / 72423
Page - 2
MQ - 162 - 03
Terminal connections
RTC-72421
RTC-72423
1
2
3
4
5
6
7
8
9
18
17
16
15
14
13
12
10
11
STD.P
CS
0
ALE
A
0
A
1
A
2
A
3
RD
GND
V
DD
(
)
V
DD
(V
DD
)
CS
1
D
0
1
2
3
WR
D
D
D
1
2
3
4
5
6
7
8
9
10
11
12
24
23
22
21
20
19
18
17
16
15
13
14
STD.P
CS
0
ALE
A
0
A
1
A
2
A
3
RD
GND
N.C.
N.C.
N.C.
V
DD
(
)
N.C.
CS
1
D
0
D
1
D
2
D
3
WR
V
DD
(
)
V
DD
N.C.
N.C.
The (V
DD
) pins are at the same electrical level as V
DD
. Do not connect these pins externally. The N.C. pins are not connected
internally. Ground them in order to prevent noise.