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Diffstat (limited to 'Documentation/hwmon/sht21')
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diff --git a/Documentation/hwmon/sht21 b/Documentation/hwmon/sht21 deleted file mode 100644 index 8b3cdda541c1..000000000000 --- a/Documentation/hwmon/sht21 +++ /dev/null @@ -1,50 +0,0 @@ -Kernel driver sht21 -=================== - -Supported chips: - * Sensirion SHT21 - Prefix: 'sht21' - Addresses scanned: none - Datasheet: Publicly available at the Sensirion website - http://www.sensirion.com/file/datasheet_sht21 - - * Sensirion SHT25 - Prefix: 'sht25' - Addresses scanned: none - Datasheet: Publicly available at the Sensirion website - http://www.sensirion.com/file/datasheet_sht25 - -Author: - Urs Fleisch <urs.fleisch@sensirion.com> - -Description ------------ - -The SHT21 and SHT25 are humidity and temperature sensors in a DFN package of -only 3 x 3 mm footprint and 1.1 mm height. The difference between the two -devices is the higher level of precision of the SHT25 (1.8% relative humidity, -0.2 degree Celsius) compared with the SHT21 (2.0% relative humidity, -0.3 degree Celsius). - -The devices communicate with the I2C protocol. All sensors are set to the same -I2C address 0x40, so an entry with I2C_BOARD_INFO("sht21", 0x40) can be used -in the board setup code. - -sysfs-Interface ---------------- - -temp1_input - temperature input -humidity1_input - humidity input -eic - Electronic Identification Code - -Notes ------ - -The driver uses the default resolution settings of 12 bit for humidity and 14 -bit for temperature, which results in typical measurement times of 22 ms for -humidity and 66 ms for temperature. To keep self heating below 0.1 degree -Celsius, the device should not be active for more than 10% of the time, -e.g. maximum two measurements per second at the given resolution. - -Different resolutions, the on-chip heater, and using the CRC checksum -are not supported yet. |