49 lines · plain
1Kernel driver lm952342=====================3 4Supported chips:5 6 * National Semiconductor / Texas Instruments LM952337 8 Addresses scanned: I2C 0x18, 0x2a, 0x2b9 10 Datasheet: Publicly available at the Texas Instruments website11 12 https://www.ti.com/product/lm9523313 14 * National Semiconductor / Texas Instruments LM9523415 16 Addresses scanned: I2C 0x18, 0x4d, 0x4e17 18 Datasheet: Publicly available at the Texas Instruments website19 20 https://www.ti.com/product/lm9523421 22Author: Guenter Roeck <linux@roeck-us.net>23 24Description25-----------26 27LM95233 and LM95234 are 11-bit digital temperature sensors with a 2-wire28System Management Bus (SMBus) interface and TrueTherm technology29that can very accurately monitor the temperature of two (LM95233)30or four (LM95234) remote diodes as well as its own temperature.31The remote diodes can be external devices such as microprocessors,32graphics processors or diode-connected 2N3904s. The chip's TruTherm33beta compensation technology allows sensing of 90 nm or 65 nm process34thermal diodes accurately.35 36All temperature values are given in millidegrees Celsius. Temperature37is provided within a range of -127 to +255 degrees (+127.875 degrees for38the internal sensor). Resolution depends on temperature input and range.39 40Each sensor has its own maximum limit, but the hysteresis is common to all41channels. The hysteresis is configurable with the tem1_max_hyst attribute and42affects the hysteresis on all channels. The first two external sensors also43have a critical limit.44 45The lm95234 driver can change its update interval to a fixed set of values.46It will round up to the next selectable interval. See the datasheet for exact47values. Reading sensor values more often will do no harm, but will return48'old' values.49