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- Kernel driver adt7410
- =====================
- Supported chips:
- * Analog Devices ADT7410
- Prefix: 'adt7410'
- Addresses scanned: None
- Datasheet: Publicly available at the Analog Devices website
- http://www.analog.com/static/imported-files/data_sheets/ADT7410.pdf
- * Analog Devices ADT7420
- Prefix: 'adt7420'
- Addresses scanned: None
- Datasheet: Publicly available at the Analog Devices website
- http://www.analog.com/static/imported-files/data_sheets/ADT7420.pdf
- * Analog Devices ADT7310
- Prefix: 'adt7310'
- Addresses scanned: None
- Datasheet: Publicly available at the Analog Devices website
- http://www.analog.com/static/imported-files/data_sheets/ADT7310.pdf
- * Analog Devices ADT7320
- Prefix: 'adt7320'
- Addresses scanned: None
- Datasheet: Publicly available at the Analog Devices website
- http://www.analog.com/static/imported-files/data_sheets/ADT7320.pdf
- Author: Hartmut Knaack <knaack.h@gmx.de>
- Description
- -----------
- The ADT7310/ADT7410 is a temperature sensor with rated temperature range of
- -55°C to +150°C. It has a high accuracy of +/-0.5°C and can be operated at a
- resolution of 13 bits (0.0625°C) or 16 bits (0.0078°C). The sensor provides an
- INT pin to indicate that a minimum or maximum temperature set point has been
- exceeded, as well as a critical temperature (CT) pin to indicate that the
- critical temperature set point has been exceeded. Both pins can be set up with a
- common hysteresis of 0°C - 15°C and a fault queue, ranging from 1 to 4 events.
- Both pins can individually set to be active-low or active-high, while the whole
- device can either run in comparator mode or interrupt mode. The ADT7410 supports
- continuous temperature sampling, as well as sampling one temperature value per
- second or even just get one sample on demand for power saving. Besides, it can
- completely power down its ADC, if power management is required.
- The ADT7320/ADT7420 is register compatible, the only differences being the
- package, a slightly narrower operating temperature range (-40°C to +150°C), and
- a better accuracy (0.25°C instead of 0.50°C.)
- The difference between the ADT7310/ADT7320 and ADT7410/ADT7420 is the control
- interface, the ADT7310 and ADT7320 use SPI while the ADT7410 and ADT7420 use
- I2C.
- Configuration Notes
- -------------------
- Since the device uses one hysteresis value, which is an offset to minimum,
- maximum and critical temperature, it can only be set for temp#_max_hyst.
- However, temp#_min_hyst and temp#_crit_hyst show their corresponding
- hysteresis.
- The device is set to 16 bit resolution and comparator mode.
- sysfs-Interface
- ---------------
- temp#_input - temperature input
- temp#_min - temperature minimum setpoint
- temp#_max - temperature maximum setpoint
- temp#_crit - critical temperature setpoint
- temp#_min_hyst - hysteresis for temperature minimum (read-only)
- temp#_max_hyst - hysteresis for temperature maximum (read/write)
- temp#_crit_hyst - hysteresis for critical temperature (read-only)
- temp#_min_alarm - temperature minimum alarm flag
- temp#_max_alarm - temperature maximum alarm flag
- temp#_crit_alarm - critical temperature alarm flag
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