Datasheet

Dual, Temperature-Controlled Resistors with Inter-
nally Calibrated Monitors and Password Protection
14 Maxim Integrated
DS1856
LOWER MEMORY
Word 0 Word 1 Word 2 Word 3
Row
(hex)
Row
Name
Byte 0/8 Byte 1/9
Byte 2/A
Byte 3/B
Byte 4/C Byte 5/D
Byte 6/E Byte 7/F
00
<1>
Threshold
0
Temp Alarm Hi Temp Alarm Lo Temp Warn Hi Temp Warn Lo
08
<1>
Threshold
1
V
CC
Alarm Hi V
CC
Alarm Lo V
CC
Warn Hi V
CC
Warn Lo
10
<1>
Threshold
2
Mon1 Alarm Hi Mon1 Alarm Lo Mon1 Warn Hi Mon1 Warn Lo
18
<1>
Threshold
3
Mon2 Alarm Hi Mon2 Alarm Lo Mon2 Warn Hi Mon2 Warn Lo
20
<1>
Threshold
4
Mon3 Alarm Hi Mon3 Alarm Lo Mon3 Warn Hi Mon3 Warn Lo
28
<1>
user ROM
EE EE EE EE EE EE EE EE
30
<1>
user ROM
EE EE EE EE EE EE EE EE
38
<1>
user ROM
EE EE EE EE EE EE EE EE
40
<1>
user ROM
EE EE EE EE EE EE EE EE
48
<1>
user ROM
EE EE EE EE EE EE EE EE
50
<1>
user ROM
EE EE EE EE EE EE EE EE
58
<1>
user ROM
EE EE EE EE EE EE EE EE
60
<2>
Values
0
Temp Value Vcc Value Mon1 Value Mon2 Value
68
<0>
Values
1
<2>
Mon3 Value
<2>
Reserved
<2>
Reserved
<0>
Status
<3>
Update
70
<2>
Alrm Wrn
Alarm
1
Alarm
0
Reserved Reserved
Warn
1
Warn
0
Reserved
Reserved
78
<0>
Table Select
<6>
Reserved
<6>
Reserved
<6>
Reserved
<6>
PWE msb
<6>
PWE lsb
<5>
Tbl Sel
EXPANDED BYTES
Bit7 Bit6 Bit5 Bit4 Bit3 Bit2 Bit1 Bit0
Byte
(hex)
Byte
Name
bit
15
bit
14
bit
13
bit
12
bit
11
bit
10
bit
9
bit
8
bit
7
bit
6
bit
5
bit
4
bit
3
bit
2
bit
1
bit
0
User EE EE EE EE EE EE EE EE EE
Temp Alarm
S
2
6
2
5
2
4
2
3
2
2
2
1
2
0
2
-1
2
-2
2
-3
2
-4
2
-5
2
-6
2
-7
2
-8
Temp Warn
S
2
6
2
5
2
4
2
3
2
2
2
1
2
0
2
-1
2
-2
2
-3
2
-4
2
-5
2
-6
2
-7
2
-8
Volt Alarm 2
15
2
14
2
13
2
12
2
11
2
10
2
9
2
8
2
7
2
6
2
5
2
4
2
3
2
2
2
1
2
0
Volt Warn 2
15
2
14
2
13
2
12
2
11
2
10
2
9
2
8
2
7
2
6
2
5
2
4
2
3
2
2
2
1
2
0
28 User ROM EE EE EE EE EE EE EE EE
30 User ROM EE EE EE EE EE EE EE EE
38 User ROM EE EE EE EE EE EE EE EE
40 User ROM EE EE EE EE EE EE EE EE
48 User ROM EE EE EE EE EE EE EE EE
50 User ROM EE EE EE EE EE EE EE EE
58 User ROM EE EE EE EE EE EE EE EE
Memory Map