| 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 |
| ======================== ==================================================== |
