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LM95231BIMM-1 Datasheet(PDF) 16 Page - National Semiconductor (TI)

[Old version datasheet] Texas Instruments acquired National semiconductor.
Part No. LM95231BIMM-1
Description  Precision Dual Remote Diode Temperature Sensor with SMBus Interface and TruTherm Technology
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Manufacturer  NSC [National Semiconductor (TI)]
Direct Link  http://www.national.com
Logo NSC - National Semiconductor (TI)

LM95231BIMM-1 Datasheet(HTML) 16 Page - National Semiconductor (TI)

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2.0 LM95231 Registers (Continued)
Bits
Description
2-0
R1M2:R1M0
000: Remote 1 TruTherm Mode disabled; used when measuring
MMBT3904 transistors
001: Remote 1 TruTherm Mode enabled; used when measuring
Processors
111: Remote 1 TruTherm Mode enabled; used when measuring
Processors
Note, all other codes provide unspecified results and should not be
used.
Power up default is 01h.
2.6 LOCAL and REMOTE MSB and LSB TEMPERATURE REGISTERS
Local Temperature MSB
(Read Only Address 10h) 9-bit plus sign format:
BIT
D7
D6
D5
D4
D3
D2
D1
D0
Value
SIGN
64
32
16
8
4
2
1
Temperature Data: LSb = 1˚C.
Local Temperature LSB
(Read Only Address 20h) 9-bit plus sign format:
BIT
D7
D6
D5
D4
D3
D2
D1
D0
Value
0.5
0.25
00000
0
Temperature Data: LSb = 0.25˚C.
Remote Temperature MSB
(Read Only Address 11h, 12h) 10 bit plus sign format:
BIT
D7
D6
D5
D4
D3
D2
D1
D0
Value
SIGN
64
32
16
8
4
2
1
Temperature Data: LSb = 1˚C.
(Read Only Address 11h, 12h) 11-bit unsigned format:
BIT
D7
D6
D5
D4
D3
D2
D1
D0
Value
128
64
32
16
8
4
2
1
Temperature Data: LSb = 1˚C.
Remote Temperature LSB
(Read Only Address 21, 22h) 10-bit plus sign or 11-bit unsigned binary
formats with filter off:
BIT
D7
D6
D5
D4
D3
D2
D1
D0
Value
0.5
0.25
0.125
0000
0
Temperature Data: LSb = 0.125˚C or 1/8˚C.
12-bit plus sign or 13-bit unsigned binary formats with filter on:
BIT
D7
D6
D5
D4
D3
D2
D1
D0
Value
0.5
0.25
0.125
0.0625
0.03125
0
0
0
Temperature Data: LSb = 0.03125˚C or 1/32˚C.
For data synchronization purposes, the MSB register should be read first if the user wants to read both MSB and LSB registers.
The LSB will be locked after the MSB is read. The LSB will be unlocked after being read. If the user reads MSBs consecutively,
each time the MSB is read, the LSB associated with that temperature will be locked in and override the previous LSB value
locked-in.
www.national.com
16


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