Manual

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FEATURES
§ 8 or 32 kbytes of user NV RAM
§ Integrated NV SRAM, real time clock,
crystal, power-fail control circuit and lithium
energy source
§ Totally nonvolatile with over 10 years of
operation in the absence of power
§ Watchdog timer restarts an out-of-control
processor
§ Alarm function schedules real-time related
activities such as system wakeup
§ Programmable interrupts and square wave
output
§ All registers are individually addressable via
the address and data bus
§ Interrupt signals are active in power-down
mode
PIN ASSIGNMENT
DS1386/DS1386P
RAMified Watchdog Timekeepe
r
www.maxim-ic.com
1
INTB
(
INTB
)
2
3
NC
NC
PFO
V
CC
WE
OE
CE
DQ7
DQ6
DQ5
DQ4
DQ3
DQ2
DQ1
DQ0
GND
4
5
6
7
8
9
10
11
12
13
14
15
16
17
SQW
NC
33
32
31
30
29
28
27
26
25
24
23
22
21
20
19
18
NC
A
12
A
11
A
10
A
9
A
8
A
7
A
6
A
5
A
4
A
3
A
2
A
1
A
0
34
INTA
X1 GND V
BAT
X2
DS1386 8k x 8
34-Pin PowerCap Module Board
(Uses DS9034PCX PowerCap)
1
INTB
(
INTB
)
2
3
NC
NC
PFO
V
CC
WE
OE
CE
DQ7
DQ6
DQ5
DQ4
DQ3
DQ2
DQ1
DQ0
GND
4
5
6
7
8
9
10
11
12
13
14
15
16
17
SQW
A
14
33
32
31
30
29
28
27
26
25
24
23
22
21
20
19
18
A
13
A
12
A
11
A
10
A
9
A
8
A
7
A
6
A
5
A
4
A
3
A
2
A
1
A
0
34
INTA
X1 GND V
BAT
X2
DS1386 32k x 8
34-Pin PowerCap Module Board
(Uses DS9034PCX PowerCap)
INT
A
INTA
13
1
2
3
4
5
6
7
8
9
10
11
12
14
31
DS1386 32k x 8
32-Pin Encapsulated Package
V
CC
32
30
29
28
27
26
25
24
23
22
21
19
20
15
16
18
17
V
CC
SQW
WE
A
13
A
8
A
9
A
11
OE
A
10
CE
DQ7
DQ5
DQ6
DQ4
DQ3
A14
A7
A5
A4
A3
A2
A1
A0
DQ1
DQ0
INTB
A12
A6
DQ2
GND
13
1
2
3
4
5
6
7
8
9
10
11
12
14
31
DS1386 8k x 8
32-Pin Encapsulated Package
NC
A7
A5
A4
A3
A2
A1
A0
DQ1
DQ0
V
CC
SQW
V
CC
WE
NC
A
8
A
9
A
11
OE
A
10
CE
DQ7
DQ5
DQ6
32
30
29
28
27
26
25
24
23
22
21
19
20
INTB
A12
A6
DQ2
GND
15
16
18
17
DQ4
DQ3