Terminal Connections - Epson RTC-72421 A Applications Manual

RTC - 72421 / 72423

Terminal connections

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