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
Thesdtemp 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 EMC1501, MCP9804, MCP9805, MCP9843, MCP98242, MCP98243, and MCP98244
- NXP Semiconductors SE97 and SE98
- STmicroelectronics STTS424, STTS424E, STTS2002, STTS2004, and STTS3000
SEE ALSO
HISTORY
The sdtemp device appeared in
NetBSD 6.0.
BUGS
Interrupt support is unimplemented.