DS1644P ram equivalent, nonvolatile timekeeping ram.
* Integrated NV SRAM, Real-Time Clock, Crystal, Power-Fail Control Circuit and Lithium Energy Source
* Clock Registers are Accessed Identically to the Static RAM..
PIN PDIP PowerCap
NAME
1 32
A14
2 30
A12
3 25
A7
4 24
A6
5 23
A5
6 22
A4
7 21
A3
8 20
A2
9 19
A1
10 18
A0
11 16
DQ0
12 15
DQ1
13 14
DQ2
14 17
GND
15 13
DQ3
16 12
DQ4
17 11
DQ5
18 10
DQ6
19 9
DQ7
20 8
CE
21 2.
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