Datasheet

LM95172
SNOSB33B –DECEMBER 2009–REVISED MARCH 2013 www.ti.com
P2 P1 P0 Register
0 0 0 Invalid.
(1)
0 0 1 Control/Status
0 1 0 T
HIGH
0 1 1 T
LOW
1 0 0
1 0 1 Invalid.
(1)
1 1 0
1 1 1 Identification
(1) Invalid. The LM95172EWG will return a "0" if read. If written to, no valid register will be modified.
Power-On Reset state: 00h
Reset Conditions: Upon Power-on Reset
Temperature Register
(Read Only): Default Register
D15 D14 D13 D12 D11 D10 D9 D8
Sign 128°C 64°C 32°C 16°C 8°C 4°C 2°C
D7 D6 D5 D4 D3 D2 D1 D0
1°C 0.5°C 0.25°C 0.125°C 0.0625°C 0.03125°C 0.015625°C Conversion - Toggle/ 0.0078125°C
Bit <15:1>: Temperature Data Byte. Represents the temperature that was measured by the most recent
temperature conversion in two's complement form. On power-up, this data is invalid until the DAV Bit in the
Control/Status Register is high (that is, after completion of the first conversion).
The resolution is user-programmable from 13-Bit resolution (0.0625°C) through 16-Bit resolution (0.0078125°C).
The desired resolution is programmed through Bits 4 and 5 of the Control/Status Register. See the description of
Control/Status Register for details on resolution selection.
The Bits not used for a selected resolution are always set to "0" and are not to be considered part of a valid
temperature reading. For example, for 14-Bit resolution, Bit <1> is not used and, therefore, it is invalid and is
always zero.
Bit <0>: Conversion Toggle or, if 16-Bit resolution has been selected, this is the 16-Bit temperature LSB.
When in 13-Bit, 14-Bit, or 15-Bit resolution mode, this Bit toggles each time the Temperature register is read if a
conversion has completed since the last read. If conversion has not completed, the value will be the same as the
last read.
When in 16-Bit resolution mode, this is the Least Significant Bit of the temperature data.
Reset Conditions: See Software Reset Sequence, Power-Up Sequence, and INITIAL SOFTWARE RESET AND
POWER-UP SEQUENCES AND POWER ON RESET (POR) for reset conditions.
One-Shot State: 8000h (-256°C)
Control/Status Register
(Read/Write) Pointer Address: 81h (Read); 01h (Write)
D15 D14 D13 D12 D11 D10 D9 D8
SD One-Shot OVERTEMP Reset Conversion Toggle OVERTEMP Status T
HIGH
T
LOW
DAV
D7 D6 D5 D4 D3 D2 D1 D0
OVERTEMP Disable OVERTEMP POL RES1 RES0 0 reserved reserved 0
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