1.\" $NetBSD: sdtemp.4,v 1.1 2009/05/09 15:04:25 pgoyette Exp $ 2.\" 3.\" Copyright (c) 2008 The NetBSD Foundation, Inc. 4.\" All rights reserved. 5.\" 6.\" This code is derived from software contributed to The NetBSD Foundation 7.\" by Paul Goyette. 8.\" 9.\" Redistribution and use in source and binary forms, with or without 10.\" modification, are permitted provided that the following conditions 11.\" are met: 12.\" 1. Redistributions of source code must retain the above copyright 13.\" notice, this list of conditions and the following disclaimer. 14.\" 2. Redistributions in binary form must reproduce the above copyright 15.\" notice, this list of conditions and the following disclaimer in the 16.\" documentation and/or other materials provided with the distribution. 17.\" 18.\" THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 19.\" ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 20.\" TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 21.\" PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 22.\" BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 23.\" CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 24.\" SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 25.\" INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 26.\" CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 27.\" ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 28.\" POSSIBILITY OF SUCH DAMAGE. 29.\" 30.Dd May 9, 2009 31.Dt SDTEMP 4 32.Os 33.Sh NAME 34.Nm sdtemp 35.Nd Microchip Technology MCP9805/98242 and compatible memory module 36temperature sensors 37.Sh SYNOPSIS 38.Cd "sdtemp0 at iic? addr 0x18" 39.Sh DESCRIPTION 40The 41.Nm 42driver provides support for the 43.Tn Microchip Technology 44MCP9805/98242 and other chips that conform to JEDEC Standard 21-C section 454.7. 46Memory module temperature sensors are optional on DDR2 and DDR3 SDRAM DIMMs. 47Sensors provided by this driver are accessed through the 48.Xr envsys 4 49API. 50The on-chip thresholds for the Alarm Window and Critical level are 51accessed through the 52.Xr sysctl 8 53utility. 54.Pp 55The 56.Nm 57supports temperature ranges from -256 to +255 degrees C. 58.Sh HARDWARE 59Chips supported by the 60.Nm 61driver include: 62.Pp 63.Bl -item -offset indent 64.It 65.Tn Microchip Technology 66.Em MCP9805 67.It 68.Tn Microchip Technology 69.Em MCP98242 70.It 71.Tn Analog Devices 72.Em ADT7408 73.It 74.Tn NXP Semiconductors 75.Em SE97 76.It 77.Tn NXP Semiconductors 78.Em SE98 79.It 80.Tn STmicroelectronics 81.Em STTS424E02-DA/DN 82.It 83.Tn Catalyst 84.Em CAT34TS02 85.It 86.Tn Catalyst 87.Em CAT6095 88.El 89.Sh SEE ALSO 90.Xr envsys 4 , 91.Xr envstat 8 , 92.Xr sysctl 8 93.Sh HISTORY 94The 95.Nm 96device appeared in 97.Nx 6.0 . 98.Sh BUGS 99Interrupt support is unimplemented. 100