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sdtemp(4) [netbsd man page]

SDTEMP(4)						   BSD Kernel Interfaces Manual 						 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 DDR3 SDRAM 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: o Catalyst CAT34TS02 and CAT6095 o Analog Devices ADT7408 o Integrated Deviced Technology TSE2002B3 and TSE3000B3 o Maxim MAX6604 o Microchip Technology MCP9805, MCP9843, MCP98242, and MCP98243 o NXP Semiconductors SE97 and SE98 o STmicroelectronics STTS424 and STTS424E SEE ALSO
envsys(4), envstat(8) HISTORY
The sdtemp device appeared in NetBSD 6.0. BUGS
Interrupt support is unimplemented. BSD
January 8, 2011 BSD

Check Out this Related Man Page

LM(4)							   BSD Kernel Interfaces Manual 						     LM(4)

NAME
lm -- National Semiconductor LM78, LM79 and compatible hardware monitors SYNOPSIS
lm0 at isa? port 0x280 flags 0x00 lm1 at isa? port 0x290 flags 0x00 lm2 at isa? port 0x310 flags 0x00 lm3 at isa? port 0xa00 flags 0x00 lm0 at pnpbios0 index ? flags 0x00 lm0 at iic? addr 0x2e flags 0x00 lm* at wbsio? DESCRIPTION
The lm driver provides support for the National Semiconductor LM series hardware monitors and register compatible chips to be used with the envsys(4) API. Most supported devices possess 11 sensors: Sensor Units Typical Use IN0 uV DC Core voltage IN1 uV DC unknown IN2 uV DC +3.3V IN3 uV DC +5V IN4 uV DC +12V IN5 uV DC -12V IN6 uV DC -5V Temp uK Motherboard Temperature Fan0 RPM Fan Fan1 RPM Chassis Fan Fan2 RPM Fan for some devices (most Winbond devices) sensor names and numbers will be different. Due to hardware limitations, fresh sensor data is only available every 2 seconds. HARDWARE
Chips supported by the lm driver include: National Semiconductor LM78, LM78-J, LM79 and LM81. Winbond W83627HF*, W83627THF*, W83627EHF*, W83627DHG*, W83637HF*, W83697HF*, W83781D, W83782D*, W83783S*, W83791D*, W83791SD and W83792D. ASUS AS99127F. For most of the Winbond chips (identified with a * above), the flags configuration option can be specified to select the type of temperature sensor: flags Sensor Type 0 Thermistor diode (Power-On default) 1 Pentium-II diode 2 2N3904 Bipolar 4 Thermistor diode SEE ALSO
envsys(4), wbsio(4), envstat(8) HISTORY
The lm device appeared in NetBSD 1.5. BUGS
Interrupt support is unimplemented. There are currently no known pnpbios IDs assigned to LM chips. BSD
February 16, 2010 BSD
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