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Timestamp:
05/24/05 23:26:22 (7 years ago)
Author:
khali
Message:

Backport the cleanups and corrections Rudolf Marek and I did when
porting the chips documentation to Linux 2.6.

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1 modified

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  • lm-sensors/trunk/doc/chips/via686a

    r3000 r3007  
    66Supported chips: 
    77  * Via VT82C686A, VT82C686B  Southbridge Integrated Hardware Monitor 
    8     Prefix: via686a 
     8    Prefix: 'via686a' 
    99    Addresses scanned: ISA in PCI-space encoded address 
    10     Datasheet: Sometimes available at the Via site http://www.via.com.tw. 
     10    Datasheet: On request through web form 
     11               (http://www.via.com.tw/en/support/datasheets/) 
    1112 
    1213Authors: Kyösti Mälkki <kmalkki@cc.hut.fi>, 
    1314         Mark D. Studebaker <mdsxyz123@yahoo.com> 
    14          Bob Dougherty <bobd@stanford.edu> 
    15          (Some conversion-factor data were contributed by  
    16          Jonathan Teh Soon Yew <j.teh@iname.com> and Alex van Kaam <darkside@chello.nl>.) 
     15         Bob Dougherty <bobd@stanford.edu> 
     16         (Some conversion-factor data were contributed by  
     17         Jonathan Teh Soon Yew <j.teh@iname.com> 
     18         and Alex van Kaam <darkside@chello.nl>.) 
    1719 
    1820Module Parameters 
    … …  
    3739For the I2C bus driver, see ../busses/i2c-viapro. 
    3840 
    39 The Via 686a implements three temperature sensors, two FAN rotation speed 
     41The Via 686a implements three temperature sensors, two fan rotation speed 
    4042sensors, five voltage sensors and alarms. 
    4143 
    4244Temperatures are measured in degrees Celsius. An alarm is triggered once 
    4345when the Overtemperature Shutdown limit is crossed; it is triggered again 
    44 as soon as it drops below the hysteresis value.  A more useful behaviour  
    45 can be found by setting the hysteresis value to +127 degrees Celsius; in  
    46 this case, alarms are issued during all the time when the actual temperature 
    47 is above the Overtemperature Shutdown value. Measurements are guaranteed 
    48 between -55 and +125 degrees, with a resolution of 1 degree. 
     46as soon as it drops below the hysteresis value. 
    4947 
    50 FAN rotation speeds are reported in RPM (rotations per minute). An alarm is 
    51 triggered if the rotation speed has dropped below a programmable limit. FAN  
     48Fan rotation speeds are reported in RPM (rotations per minute). An alarm is 
     49triggered if the rotation speed has dropped below a programmable limit. Fan  
    5250readings can be divided by a programmable divider (1, 2, 4 or 8) to give 
    53 the readings more range or accuracy. This is important because some FANs 
    54 report only one 'tick' each rotation, while others report two - making 
    55 all readings twice as high. Not all RPM values can accurately be represented, 
    56 so some rounding is done. With a divider of 2, the lowest representable 
    57 value is around 2600 RPM. 
     51the readings more range or accuracy. Not all RPM values can accurately be 
     52represented, so some rounding is done. With a divider of 2, the lowest 
     53representable value is around 2600 RPM. 
    5854 
    5955Voltage sensors (also known as IN sensors) report their values in volts. 
    6056An alarm is triggered if the voltage has crossed a programmable minimum  
    61 or maximum limit. Note that minimum in this case always means 'closest to 
    62 zero'; this is important for negative voltage measurements. All voltage 
    63 inputs can measure voltages between 0 and 4.08 volts, with a resolution 
    64 of 0.016 volt. 
     57or maximum limit. Voltages are internally scalled, so each voltage channel 
     58has a different resolution and range. 
    6559 
    6660If an alarm triggers, it will remain triggered until the hardware register