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LM95235 Datasheet(PDF) 19 Page - National Semiconductor (TI)

[Old version datasheet] Texas Instruments acquired National semiconductor. Click here to check the latest version.
Part No. LM95235
Description  Precision 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)

LM95235 Datasheet(HTML) 19 Page - National Semiconductor (TI)

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2.0 LM95235 Registers (Continued)
2.4 STATUS REGISTERS
Status Register 1
(Read Only Address 02h):
D7
D6
D5
D4
D3
D2
D1
D0
Busy
0
0
ROS
0
Diode Fault
RTCRIT
LOC
Bits
Name
Description
7
Busy
When set to "1" the part is converting.
6-5
Reserved
Report "0" when read.
4
ROS
Status Bit for Remote OS
3
Reserved
Reports "0" when read.
2
Diode Fault
Status bit for missing diode (Either D+ is shorted to GND, and/or V
DD, and/or D-;
or D+ is floating.)
Note: The unsigned registers will report 0˚C if read; the signed value registers
will report −128.000˚C.
1
RTCRIT
Status bit for Remote TCRIT.
0
LOC
Status bit for the shared Local OS and TCRIT .
Status Register 2
(Read Only Address 33h):
D7
D6
D5
D4
D3
D2
D1
D0
Not Ready
TruTherm 3904 Detect
00000
0
Bits
Name
Description
7
Not Ready
Waiting for 30 ms power-up sequence to end.
6
TruTherm 3904 Detect
1: MMBT3904 is connected and TruTherm technology is enabled.
0: MMBT3904 is connected and TruTherm technology is disabled.
5-0
Reserved
Reports "0" when read.
2.5 LIMIT REGISTERS
Unsigned Remote OS Limit - 0˚C to 255˚C
(Read/Write Address 07h/0Dh or 0Dh/07h):
D7
D6
D5
D4
D3
D2
D1
D0
128
64
32
16
8
4
2
1
Power on Reset default is 55h (85˚C).
Unsigned Local Shared OS and T_CRIT Limit - 0˚C to 127˚C
(Read/Write Address 20h):
D7
D6
D5
D4
D3
D2
D1
D0
128
64
32
16
8
4
2
1
Power on Reset default is 55h (85˚C).
Unsigned Remote T_CRIT Limit - 0˚C to 255˚C
(Read/Write Address 19h):
D7
D6
D5
D4
D3
D2
D1
D0
128
64
32
16
8
4
2
1
Power on Reset default is 6Eh (110˚C).
www.national.com
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