Datasheet

LM95221

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SNIS134B –MAY 2004–REVISED MARCH 2013

Figure 7. Conversion Rate Effect on Power Supply Current

POWER-ON-DEFAULT STATES

LM95221 always powers up to these known default states. The LM95221 remains in these states until after the

first conversion.

1. Command Register set to 00h

2. Local Temperature set to 0°C

3. Remote Diode Temperature set to 0°C until the end of the first conversion

4. Status Register depends on state of thermal diode inputs

5. Configuration register set to 00h; continuous conversion, time = 66ms

SMBus INTERFACE

The LM95221 operates as a slave on the SMBus, so the SMBCLK line is an input and the SMBDAT line is

bidirectional. The LM95221 never drives the SMBCLK line and it does not support clock stretching. According to

SMBus specifications, the LM95221 has a 7-bit slave address. All bits A6 through A0 are internally programmed

and can not be changed by software or hardware. The LM95221 has the following SMBus slave address:

Version A6 A5 A4 A3 A2 A1 A0

LM95221 0 1 0 1 0 1 1

TEMPERATURE DATA FORMAT

Temperature data can only be read from the Local and Remote Temperature registers .

Remote temperature data is represented by an 11-bit, two's complement word or unsigned binary word with an

LSb (Least Significant Bit) equal to 0.125°C. The data format is a left justified 16-bit word available in two 8-bit

registers. Unused bits will always report "0".

Product Folder Links: LM95221