Rainbow Electronics DS1215 - Manual (Page 5)

DS1215
032697 5/15
RAM/TIME CHIP INTERFACE Figure 3
CMOS STATIC RAM
ADD
DATA I/O
WE
OE
CE
DS1215
CEO
OE
WE
CEI
RST
BAT 1
X 1
BAT 2
X 2
V CCO
D
Q
V CCI
ROM/
RAM
+ +
BAT 1 BAT 2
32.768 KHz
4 14
13
11
3
12
10
9
7
6
15
+5 VDC
A0 – AN
D0 – D7
CE
RST
OR TIE TO GND FOR
ONE–BATTERY
OPERATION
V CC
1 2
ROM/TIME CHIP INTERFACE Figure 4
ROM
ADD
DATA I/O
A2
OE
A0
DS1215
D
OE
WE
CEI
RST
BAT 1
X 1
BAT 2
X 2
CEO
Q
V CCI
V CCO
ROM/
RAM
+ +
BAT 1 BAT 2 1 2
32.768 KHz
4 14
13
11
3
12
6
9
16
7
10
+5 VDC
A0 – AN
D0 – D7
CE
RST
OR TIE TO GND FOR
ONE–BATTERY
OPERATION
CE
V CC
OE
15