AMDTEMP(4)						   BSD Kernel Interfaces Manual 						AMDTEMP(4)

NAME

     amdtemp -- AMD CPU on-die digital thermal sensor

SYNOPSIS

     amdtemp* at pchb?

DESCRIPTION

     The amdtemp driver provides support for the on-die digital thermal sensor present on AMD K8, AMD Barcelona, AMD Phenom, AMD Griffin, and AMD
     Fusion CPUs.

     These sensors were officially introduced in AMD K8 Revision F processors, and provide 0.5 degC accuracy.  Precision was improved in Revision
     G chips, which provide two more bits for 0.25 degC steppings.  Each core has two temperature sensors, and there are up to two cores per CPU
     socket.

     AMD Barcelona, AMD Phenom, AMD Griffin, and AMD Fusion provide 0.125 degC accuracy and provide one temperature sensor for each CPU socket.

     The amdtemp driver reports temperatures through the envsys(4) API.

	   Sensor	 Units	  Typical Use
	   CPUN sensor0  uK	  cpuN temperature

SEE ALSO

     envsys(4), envstat(8), powerd(8)

HISTORY

     The amdtemp driver first appeared in OpenBSD 4.4 named ``kate''.  It was then ported to NetBSD 5.0.  The driver has been renamed with support
     for newer AMD CPUs.

AUTHORS

     The amdtemp driver was written by Constantine A. Murenin <cnst@openbsd.org> whilst at the University of Waterloo.	It was adapted to NetBSD
     by Christoph Egger.

BSD
								   March 2, 2012							       BSD