DS12887A Datasheet, PDF (11/19 Pages) Maxim Integrated Products – Real-Time Clock

EXPANDED PROGRAM MEMORY READ CYCLE
2
ALE
PSEN
6
3
4
7
5
8
13
11
10
9
PORT 0
A7–A0
12
INSTR IN
PORT 2
A15–A8
EXPANDED DATA MEMORY READ CYCLE
27
ALE
DS5000(T)
A7–A0
A15–A8
PSEN
RD
PORT 0
PORT 2
19
21
14
16
3
4
26
A7–A0
(Rn OR DPL)
22
20
18
17
DATA IN
P2.7–P2.0 OR A15–A8 FROM DPH
A7–A0
(PCL)
INSTR
IN
A15–A8 FROM PCH
021998 11/19