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.