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48 lines
1.7 KiB
48 lines
1.7 KiB
Kernel driver lm95234 |
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Supported chips: |
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* National Semiconductor / Texas Instruments LM95233 |
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Addresses scanned: I2C 0x18, 0x2a, 0x2b |
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Datasheet: Publicly available at the Texas Instruments website |
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https://www.ti.com/product/lm95233 |
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* National Semiconductor / Texas Instruments LM95234 |
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Addresses scanned: I2C 0x18, 0x4d, 0x4e |
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Datasheet: Publicly available at the Texas Instruments website |
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https://www.ti.com/product/lm95234 |
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Author: Guenter Roeck <[email protected]> |
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Description |
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LM95233 and LM95234 are 11-bit digital temperature sensors with a 2-wire |
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System Management Bus (SMBus) interface and TrueTherm technology |
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that can very accurately monitor the temperature of two (LM95233) |
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or four (LM95234) remote diodes as well as its own temperature. |
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The remote diodes can be external devices such as microprocessors, |
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graphics processors or diode-connected 2N3904s. The chip's TruTherm |
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beta compensation technology allows sensing of 90 nm or 65 nm process |
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thermal diodes accurately. |
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All temperature values are given in millidegrees Celsius. Temperature |
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is provided within a range of -127 to +255 degrees (+127.875 degrees for |
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the internal sensor). Resolution depends on temperature input and range. |
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Each sensor has its own maximum limit, but the hysteresis is common to all |
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channels. The hysteresis is configurable with the tem1_max_hyst attribute and |
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affects the hysteresis on all channels. The first two external sensors also |
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have a critical limit. |
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The lm95234 driver can change its update interval to a fixed set of values. |
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It will round up to the next selectable interval. See the datasheet for exact |
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values. Reading sensor values more often will do no harm, but will return |
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'old' values.
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