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1 | Kernel driver lm95245 | ||
2 | ================== | ||
3 | |||
4 | Supported chips: | ||
5 | * National Semiconductor LM95245 | ||
6 | Addresses scanned: I2C 0x18, 0x19, 0x29, 0x4c, 0x4d | ||
7 | Datasheet: Publicly available at the National Semiconductor website | ||
8 | http://www.national.com/mpf/LM/LM95245.html | ||
9 | |||
10 | |||
11 | Author: Alexander Stein <alexander.stein@systec-electronic.com> | ||
12 | |||
13 | Description | ||
14 | ----------- | ||
15 | |||
16 | The LM95245 is an 11-bit digital temperature sensor with a 2-wire System | ||
17 | Management Bus (SMBus) interface and TruTherm technology that can monitor | ||
18 | the temperature of a remote diode as well as its own temperature. | ||
19 | The LM95245 can be used to very accurately monitor the temperature of | ||
20 | external devices such as microprocessors. | ||
21 | |||
22 | All temperature values are given in millidegrees Celsius. Local temperature | ||
23 | is given within a range of -127 to +127.875 degrees. Remote temperatures are | ||
24 | given within a range of -127 to +255 degrees. Resolution depends on | ||
25 | temperature input and range. | ||
26 | |||
27 | Each sensor has its own critical limit, but the hysteresis is common to all | ||
28 | two channels. | ||
29 | |||
30 | The lm95245 driver can change its update interval to a fixed set of values. | ||
31 | It will round up to the next selectable interval. See the datasheet for exact | ||
32 | values. Reading sensor values more often will do no harm, but will return | ||
33 | 'old' values. | ||