SDTEMP(4)

NAME
sdtemp - JEDEC JC-42.4 compatible memory module temperature sensors

SYNOPSIS
sdtemp* at iic? addr 0x18
sdtemp* at iic? addr 0x19
sdtemp* at iic? addr 0x1a
sdtemp* at iic? addr 0x1b
sdtemp* at iic? addr 0x1c
sdtemp* at iic? addr 0x1d
sdtemp* at iic? addr 0x1e
sdtemp* at iic? addr 0x1f

DESCRIPTION
The sdtemp driver provides support for the Microchip Technology MCP9805/98242 and other chips that conform to JEDEC Standard 21-C section 4.7. Memory module temperature sensors are optional on DDR2 and newer DIMMs. Sensors provided by this driver, including the on-chip thresholds for the Alarm Window and Critical level, are accessed through the envsys(4) API.

The sdtemp supports temperature ranges from -256 to +255 degrees C.

Chips supported by the sdtemp driver include TSE2004av compliant devices and:

•   Analog Devices ADT7408

•   Atmel AT30TS00 and AT30TSE004

•   On semiconductor (Catalyst) CAT34TS02, CAT34TS02C, CAT34TS04 and CAT6095

•   Giantec Semiconductor GT30TS00 and GT34TS02

•   Integrated Deviced Technology TSE2002B3, TSE2002GB2, TSE2004GB2, TS3000B3, TS3000GB0, TS3000GB2 and TS30001GB2

•   Maxim MAX6604

•   Microchip Technology MCP9804, MCP9805, MCP9843, MCP98242, MCP98243 and MCP98244

•   NXP Semiconductors SE97 and SE98

•   STmicroelectronics STTS424, STTS424E, STTS2002, STTS2004 and STTS3000

SEE ALSO
envsys(4), envstat(8)

HISTORY
The sdtemp device appeared in NetBSD 6.0.

BUGS
Interrupt support is unimplemented.