LM95231_06 NSC [National Semiconductor], LM95231_06 Datasheet - Page 16

• Manufacturer Part Number: LM95231_06
• Description: Precision Dual Remote Diode Temperature Sensor with SMBus Interface and TruTherm Technology
• Manufacturer: NSC [National Semiconductor]

www.national.com
2.0 LM95231 Registers
Power up default is 01h.
2.6 LOCAL and REMOTE MSB and LSB TEMPERATURE REGISTERS
Temperature Data: LSb = 1˚C.
Temperature Data: LSb = 0.25˚C.
Temperature Data: LSb = 1˚C.
Temperature Data: LSb = 1˚C.
Temperature Data: LSb = 0.125˚C or 1/8˚C.
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.
Bits
2-0
12-bit plus sign or 13-bit unsigned binary formats with filter on:
BIT
Value
(Read Only Address 11h, 12h) 11-bit unsigned format:
BIT
Value
Description
R1M2:R1M0
128
D7
0.5
D7
(Read Only Address 10h) 9-bit plus sign format:
(Read Only Address 20h) 9-bit plus sign format:
(Read Only Address 11h, 12h) 10 bit plus sign format:
(Read Only Address 21, 22h) 10-bit plus sign or 11-bit unsigned binary
formats with filter off:
BIT
Value
Value
Value
Value
BIT
BIT
BIT
D6
64
0.25
D6
SIGN
SIGN
0.5
0.5
D7
D7
D7
D7
(Continued)
0.25
0.25
D6
D6
D6
D5
D6
32
64
64
Remote Temperature MSB
Remote Temperature LSB
0.125
Local Temperature MSB
Local Temperature LSB
D5
0.125
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.
D5
D5
D5
D5
32
32
0
D4
16
16
0.0625
D4
D4
D4
D4
16
16
0
0
D4
D3
D3
D3
D3
8
0
8
0
0.03125
D3
8
D3
D2
D2
D2
D2
4
0
4
0
D1
D1
D1
D1
2
0
2
0
D2
4
D2
0
D0
D0
D0
D0
1
0
1
0
D1
2
D1
0
D0
D0
1
0