98 lines
3.1 KiB
Groff
98 lines
3.1 KiB
Groff
.\" $NetBSD: sdtemp.4,v 1.8 2018/02/23 16:32:44 wiz 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 February 22, 2018
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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 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 newer 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 TSE2004av compliant devices and:
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.Bl -bullet -offset indent
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.It
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Analog Devices ADT7408
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.It
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Atmel AT30TS00 and AT30TSE004
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.It
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On semiconductor (Catalyst) CAT34TS02, CAT34TS02C, CAT34TS04
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and CAT6095
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.It
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Giantec Semiconductor GT30TS00 and GT34TS02
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.It
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Integrated Deviced Technology TSE2002B3, TSE2002GB2, TSE2004GB2,
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TS3000B3, TS3000GB0, TS3000GB2, and TS30001GB2
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.It
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Maxim MAX6604
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.It
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Microchip Technology EMC1501, MCP9804, MCP9805, MCP9843, MCP98242,
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MCP98243, and MCP98244
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.It
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NXP Semiconductors SE97 and SE98
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.It
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STmicroelectronics STTS424, STTS424E, STTS2002, STTS2004, and
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STTS3000
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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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