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LM95231 Datasheet(PDF) 15 Page - Texas Instruments

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Part No. LM95231
Description  Precision Dual Remote Diode Temperature Sensor with SMBus Interface and TruTherm??Technology
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Manufacturer  TI [Texas Instruments]
Direct Link  http://www.ti.com
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LM95231 Datasheet(HTML) 15 Page - Texas Instruments

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LM95231
www.ti.com
SNIS139E – FEBRUARY 2005 – REVISED MARCH 2013
2. When SMBDAT is HIGH, have the master initiate an SMBus start. The LM95231 will respond properly to an
SMBus start condition at any point during the communication. After the start the LM95231 will expect an
SMBus Address address byte.
ONE-SHOT CONVERSION
The One-Shot register is used to initiate a single conversion and comparison cycle when the device is in standby
mode, after which the device returns to standby. This is not a data register and it is the write operation that
causes the one-shot conversion. The data written to this address is irrelevant and is not stored. A zero will
always be read from this register.
LM95231 Registers
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
Command
P0-P7: Command
Table 6. Register Summary
Name
Command
Power-On
Read/Write
# of used bits
Comments
(Hex)
Default Value
(Hex)
Status Register
02h
-
RO
5
4 status bits and 1 busy bit
Configuration Register
03h
00h
R/W
5
Includes conversion rate control
Remote Diode Filter Control
06h
05h
R/W
2
Controls thermal diode filter
setting
Remote Diode Model Type
30h
01h
R/W
2
Selects the 2N3904 or Pentium
Select
4 processor on 90nm process
thermal diode model
Remote Diode TruTherm Mode
07h
01h
8
Enables or disables TruTherm
Control
technology for Remote Diode
measurements
1-shot
0Fh
-
WO
-
Activates one conversion for all
3 channels if the chip is in
standby mode (i.e. RUN/STOP
bit = 1). Data transmitted by the
host is ignored by the LM95231.
Local Temperature MSB
10h
-
RO
8
Remote Temperature 1 MSB
11h
-
RO
8
Remote Temperature 2 MSB
12h
-
RO
8
Local Temperature LSB
20h
-
RO
2
All unused bits will report zero
Remote Temperature 1 LSB
21h
-
RO
3/5
All unused bits will report zero
Remote Temperature 2 LSB
22h
-
RO
3/5
All unused bits will report zero
Manufacturer ID
FEh
01h
RO
Revision ID
FFh
A1h
RO
STATUS REGISTER
D7
D6
D5
D4
D3
D2
D1
D0
Busy
Reserved
R2TME
R1TME
RD2M
RD1M
0
0
0
Copyright © 2005–2013, Texas Instruments Incorporated
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