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
11 Author: Alexander Stein <alexander.stein@systec-electronic.com>
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.
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.
27 Each sensor has its own critical limit. Additionally, there is a relative
28 hysteresis value common to both critical limits. To make life easier to
29 user-space applications, two absolute values are exported, one for each
30 channel, but these values are of course linked. Only the local hysteresis
31 can be set from user-space, and the same delta applies to the remote
34 The lm95245 driver can change its update interval to a fixed set of values.
35 It will round up to the next selectable interval. See the datasheet for exact
36 values. Reading sensor values more often will do no harm, but will return