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LM82 Datasheet(PDF) 12 Page - National Semiconductor (TI)

[Old version datasheet] Texas Instruments acquired National semiconductor. Click here to check the latest version.
Part No. LM82
Description  Remote Diode and Local Digital Temperature Sensor with Two-Wire Interface
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Maker  NSC [National Semiconductor (TI)]
Homepage  http://www.national.com
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LM82 Datasheet(HTML) 12 Page - National Semiconductor (TI)

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1.0 Functional Description (Continued)
2.0 LM82 REGISTERS
2.1 COMMAND REGISTER
Selects which registers will be read from or written to. Data for this register should be transmitted during the Command Byte of
the SMBus write communication.
P7
P6
P5
P4
P3
P2
P1
P0
0
Command Select
P0-P7: Command Select
Command Se-
lect Address
Power On Default State
Register Name
Register Function
<P7:P0> hex
<D7:D0> binary
<D7:D0> deci-
mal
00h
0000 0000
0
RLT
Read Local Temperature
01h
0000 0000
0
RRT
Read Remote Temperature
02h
0000 0000
0
RSR
Read Status Register
03h
0000 0000
0
RC
Read Configuration
04h
0000 0000
0
Reserved
05h
0111 1111
127
RLHS
Read Local HIGH Setpoint
06h
Reserved
07h
0111 1111
127
RRHS
Read Remote HIGH Setpoint
08h
Reserved
09h
0000 0000
WC
Write Configuration
0Ah
Reserved
0Bh
0111 1111
127
WRHS
Write Local HIGH Setpoint
0Ch
Reserved
0Dh
0111 1111
127
WLHS
Write Local HIGH Setpoint
0Eh-2Fh
Reserved for Future Use
30h-31h
0000 0000
0
Reserved
32h-34h
Reserved for Future Use
35h
0000 0000
0
Reserved
36h-37h
Reserved for Future Use
38h
0111 1111
127
Reserved
39h
Reserved for Future Use
3Ah
0111 1111
127
Reserved
3Bh-41h
Reserved for Future Use
42h
0111 1111
127
RTCS
Read T_CRIT Setpoint
43h-4Fh
Reserved for Future Use
50h
0111 1111
127
Reserved
51h
Reserved for Future Use
52h
0111 1111
127
Reserved
53h-59h
Reserved for Future Use
5Ah
0111 1111
127
WTCS
Write T_CRIT Setpoint
5Ch-6Fh and
F0h-FDh
Reserved for Future Use
FEh
0000 0001
1
RMID
Read Manufacturers ID
FFh
1
RSR
Read Stepping or Die
Revision Code
www.national.com
12


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