111 lines
2.9 KiB
Groff
111 lines
2.9 KiB
Groff
.\" $NetBSD: sdtemp.4,v 1.4 2011/10/11 17:53:27 njoly Exp $
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.\"
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.\" Copyright (c) 2008 The NetBSD Foundation, Inc.
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.\" All rights reserved.
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.\"
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.\" This code is derived from software contributed to The NetBSD Foundation
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.\" by Paul Goyette.
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.\"
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.\" Redistribution and use in source and binary forms, with or without
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.\" modification, are permitted provided that the following conditions
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.\" are met:
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.\" 1. Redistributions of source code must retain the above copyright
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.\" notice, this list of conditions and the following disclaimer.
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.\" 2. Redistributions in binary form must reproduce the above copyright
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.\" notice, this list of conditions and the following disclaimer in the
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.\" documentation and/or other materials provided with the distribution.
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.\"
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.\" THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
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.\" ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
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.\" TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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.\" PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
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.\" BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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.\" CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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.\" SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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.\" INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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.\" CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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.\" ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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.\" POSSIBILITY OF SUCH DAMAGE.
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.\"
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.Dd January 8, 2011
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.Dt SDTEMP 4
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.Os
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.Sh NAME
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.Nm sdtemp
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.Nd JEDEC JC-42.4 compatible memory module temperature sensors
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.Sh SYNOPSIS
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.Cd "sdtemp* at iic? addr 0x18"
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.Cd "sdtemp* at iic? addr 0x19"
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.Cd "sdtemp* at iic? addr 0x1a"
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.Cd "sdtemp* at iic? addr 0x1b"
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.Cd "sdtemp* at iic? addr 0x1c"
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.Cd "sdtemp* at iic? addr 0x1d"
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.Cd "sdtemp* at iic? addr 0x1e"
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.Cd "sdtemp* at iic? addr 0x1f"
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.Sh DESCRIPTION
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The
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.Nm
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driver provides support for the
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.Tn Microchip Technology
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MCP9805/98242 and other chips that conform to JEDEC Standard 21-C section
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4.7.
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Memory module temperature sensors are optional on DDR2 and DDR3 SDRAM DIMMs.
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Sensors provided by this driver, including the on-chip thresholds for the
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Alarm Window and Critical level, are accessed through the
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.Xr envsys 4
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API.
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.Pp
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The
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.Nm
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supports temperature ranges from -256 to +255 degrees C.
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.Pp
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Chips supported by the
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.Nm
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driver include:
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.Pp
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.Bl -bullet -offset indent
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.It
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.Tn Catalyst
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.Em CAT34TS02
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and
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.Em CAT6095
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.It
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.Tn Analog Devices
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.Em ADT7408
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.It
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.Tn Integrated Deviced Technology
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.Em TSE2002B3
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and
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.Em TSE3000B3
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.It
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.Tn Maxim
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.Em MAX6604
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.It
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.Tn Microchip Technology
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.Em MCP9805 ,
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.Em MCP9843 ,
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.Em MCP98242 ,
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and
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.Em MCP98243
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.It
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.Tn NXP Semiconductors
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.Em SE97
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and
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.Em SE98
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.It
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.Tn STmicroelectronics
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.Em STTS424
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and
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.Em STTS424E
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.El
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.Sh SEE ALSO
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.Xr envsys 4 ,
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.Xr envstat 8
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.Sh HISTORY
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The
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.Nm
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device appeared in
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.Nx 6.0 .
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.Sh BUGS
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Interrupt support is unimplemented.
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