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- Kernel driver lm95245
- ==================
- Supported chips:
- * National Semiconductor LM95245
- Addresses scanned: I2C 0x18, 0x19, 0x29, 0x4c, 0x4d
- Datasheet: Publicly available at the National Semiconductor website
- http://www.national.com/mpf/LM/LM95245.html
- Author: Alexander Stein <alexander.stein@systec-electronic.com>
- Description
- -----------
- The LM95245 is an 11-bit digital temperature sensor with a 2-wire System
- Management Bus (SMBus) interface and TruTherm technology that can monitor
- the temperature of a remote diode as well as its own temperature.
- The LM95245 can be used to very accurately monitor the temperature of
- external devices such as microprocessors.
- All temperature values are given in millidegrees Celsius. Local temperature
- is given within a range of -127 to +127.875 degrees. Remote temperatures are
- given within a range of -127 to +255 degrees. Resolution depends on
- temperature input and range.
- Each sensor has its own critical limit. Additionally, there is a relative
- hysteresis value common to both critical limits. To make life easier to
- user-space applications, two absolute values are exported, one for each
- channel, but these values are of course linked. Only the local hysteresis
- can be set from user-space, and the same delta applies to the remote
- hysteresis.
- The lm95245 driver can change its update interval to a fixed set of values.
- It will round up to the next selectable interval. See the datasheet for exact
- values. Reading sensor values more often will do no harm, but will return
- 'old' values.
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