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LEARN ABOUT NETBSD

lm

LM(4)							   BSD Kernel Interfaces Manual 						     LM(4)

NAME

     lm -- National Semiconductor LM78, LM79 and compatible hardware monitors

SYNOPSIS

     lm0 at isa? port 0x280 flags 0x00
     lm1 at isa? port 0x290 flags 0x00
     lm2 at isa? port 0x310 flags 0x00
     lm3 at isa? port 0xa00 flags 0x00
     lm0 at pnpbios0 index ? flags 0x00
     lm0 at iic? addr 0x2e flags 0x00
     lm* at wbsio?

DESCRIPTION

     The lm driver provides support for the National Semiconductor LM series hardware monitors and register compatible chips to be used with the
     envsys(4) API.

     Most supported devices possess 11 sensors:

	   Sensor    Units    Typical Use
	   IN0	     uV DC    Core voltage
	   IN1	     uV DC    unknown
	   IN2	     uV DC    +3.3V
	   IN3	     uV DC    +5V
	   IN4	     uV DC    +12V
	   IN5	     uV DC    -12V
	   IN6	     uV DC    -5V
	   Temp      uK       Motherboard Temperature
	   Fan0      RPM      Fan
	   Fan1      RPM      Chassis Fan
	   Fan2      RPM      Fan
     for some devices (most Winbond devices) sensor names and numbers will be different.

     Due to hardware limitations, fresh sensor data is only available every 2 seconds.

HARDWARE

     Chips supported by the lm driver include:

	   National Semiconductor LM78, LM78-J, LM79 and LM81.

	   Winbond W83627HF*, W83627THF*, W83627EHF*, W83627DHG*, W83637HF*, W83697HF*, W83781D, W83782D*, W83783S*, W83791D*, W83791SD and
	   W83792D.

	   ASUS AS99127F.

     For most of the Winbond chips (identified with a * above), the flags configuration option can be specified to select the type of temperature
     sensor:

	   flags    Sensor Type
	   0	    Thermistor diode (Power-On default)
	   1	    Pentium-II diode
	   2	    2N3904 Bipolar
	   4	    Thermistor diode

SEE ALSO

     envsys(4), wbsio(4), envstat(8)

HISTORY

     The lm device appeared in NetBSD 1.5.

BUGS

     Interrupt support is unimplemented.

     There are currently no known pnpbios IDs assigned to LM chips.

BSD
								 February 16, 2010							       BSD