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- Kernel driver lm95234
- =====================
- Supported chips:
- * National Semiconductor / Texas Instruments LM95233
- Addresses scanned: I2C 0x18, 0x2a, 0x2b
- Datasheet: Publicly available at the Texas Instruments website
- http://www.ti.com/product/lm95233
- * National Semiconductor / Texas Instruments LM95234
- Addresses scanned: I2C 0x18, 0x4d, 0x4e
- Datasheet: Publicly available at the Texas Instruments website
- http://www.ti.com/product/lm95234
- Author: Guenter Roeck <linux@roeck-us.net>
- Description
- -----------
- LM95233 and LM95234 are 11-bit digital temperature sensors with a 2-wire
- System Management Bus (SMBus) interface and TrueTherm technology
- that can very accurately monitor the temperature of two (LM95233)
- or four (LM95234) remote diodes as well as its own temperature.
- The remote diodes can be external devices such as microprocessors,
- graphics processors or diode-connected 2N3904s. The chip's TruTherm
- beta compensation technology allows sensing of 90 nm or 65 nm process
- thermal diodes accurately.
- All temperature values are given in millidegrees Celsius. Temperature
- is provided within a range of -127 to +255 degrees (+127.875 degrees for
- the internal sensor). Resolution depends on temperature input and range.
- Each sensor has its own maximum limit, but the hysteresis is common to all
- channels. The hysteresis is configurable with the tem1_max_hyst attribute and
- affects the hysteresis on all channels. The first two external sensors also
- have a critical limit.
- The lm95234 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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