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git-svn-id: http://lm-sensors.org/svn/lm-sensors/trunk@1956 7894878c-1315-0410-8ee3-d5d059ff63e0
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Jean Delvare committed 2003-08-13 20:17:38 +00:00
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doc/chips/lm83
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@@ -1,7 +1,7 @@
Kernel driver `lm83.o'
=====================
Status: Incomplete and untested
Status: Complete and lightly tested
Supported chips:
* National Semiconductor LM83
@@ -49,17 +49,21 @@ will be reported instead of four.
Alarms and critical temperature (common to all four temperature readings)
are not handled by this driver yet, but should be someday.
The LM83 is only found on a handful of motherboards. An unconfirmed list
follows. If you can confirm or infirm the fact that any of these
motherboards do actually have an LM83, please contact us.
Note that the LM90 can easily be misdetected as a LM83.
The LM83 is only found on a handful of motherboards. Both a confirmed
list and an unconfirmed list follow. If you can confirm or infirm the
fact that any of these motherboards do actually have an LM83, please
contact us. Note that the LM90 can easily be misdetected as a LM83.
Confirmed motherboards:
SBS P014
Unconfirmed motherboards:
Gigabyte GA-8IK1100
Iwill MPX2
Soltek SL-75DRV5
Note that the driver is untested so far. We really want testers! If you
want to help, please contact us.
The driver has been successfully tested by Magnus Forsström, who I'd
like to thank here. More testers will be of course welcome.
The fact that the LM83 is only scarcely used can be easily explained.
Most motherboards come with more than just temperature sensors for
@@ -76,14 +80,26 @@ sense is on SMP systems, such as the above-mentioned Iwill MPX2,
because you want an additional temperature sensor for each additional
CPU.
On the SBS P014, this is different, since the LM83 is the only hardware
monitoring chipset. One temperature sensor is used for the motherboard
(actually measuring the LM83's own temperature), one is used for the
CPU. The two other sensors must be used to measure the temperature of
two other points of the motherboard. We suspect these points to be the
north and south bridges, but this couldn't be confirmed.
All temperature values are given in degrees Celcius. Local temperature
is given within a range of 0 to +85 degrees. Remote temperatures are
given within a range of 0 to +125 degrees. Resolution is 1.0 degree,
accuracy is guaranteed to 3.0 degrees (see the datasheet for more
details).
Each sensor has its own high limit. There is no hysteresis mechanism as
found on most recent temperature sensors.
Each sensor has its own high limit, but the critical limit is common to
all four sensors. There is no hysteresis mechanism as found on most
recent temperature sensors.
The lm83 driver will not update its values more frequently than every
other second; reading them more often will do no harm, but will return
'old' values.
Chip Features
@@ -100,6 +116,8 @@ temp3 - - R- 0
temp3_high temp3 temp3 RW 0
temp4 - - R- 0
temp4_high temp4 temp4 RW 0
tcrit - - RW 0
alarms - - R- 0
LABEL FEATURE SYMBOL SYSCTL FILE:N
temp1 SENSORS_LM83_LOCAL_TEMP temp1:2
@@ -110,3 +128,5 @@ temp3 SENSORS_LM83_REMOTE2_TEMP temp3:2
temp3_high SENSORS_LM83_REMOTE2_HIGH temp3:1
temp4 SENSORS_LM83_REMOTE3_TEMP temp4:2
temp4_high SENSORS_LM83_REMOTE3_HIGH temp4:1
tcrit SENSORS_LM83_TCRIT tcrit:1
alarms SENSORS_LM83_ALARMS alarms:1