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https://github.com/lm-sensors/lm-sensors.git
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Mark D. Studebaker
d5bc0e0c11
of the datasheets. Untested. git-svn-id: http://lm-sensors.org/svn/lm-sensors/trunk@973 7894878c-1315-0410-8ee3-d5d059ff63e0
81 lines
3.0 KiB
Plaintext
81 lines
3.0 KiB
Plaintext
Kernel driver `ds1621.o'
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=====================
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Status: Complete and tested, alarms experimental
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Supported chips:
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* Dallas Semiconductor DS1621
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Prefix: `ds1621'
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Addresses scanned: I2C 0x48 - 0x4f (inclusive)
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Datasheet: Publicly available at the Dallas Semiconductor website
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http://www.dalsemi.com
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* Dallas Semiconductor DS1625
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Prefix: `ds1621'
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Addresses scanned: I2C 0x48 - 0x4f (inclusive)
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Datasheet: Publicly available at the Dallas Semiconductor website
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http://www.dalsemi.com
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Author: Christian W. Zuckschwerdt <zany@triq.net>
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Module Parameters
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-----------------
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* force: short array (min = 1, max = 48)
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List of adapter,address pairs to boldly assume to be present
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* force_ds1621: short array (min = 1, max = 48)
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List of adapter,address pairs which are unquestionably assumed to contain
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a `ds1621' chip
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* ignore: short array (min = 1, max = 48)
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List of adapter,address pairs not to scan
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* ignore_range: short array (min = 1, max = 48)
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List of adapter,start-addr,end-addr triples not to scan
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* probe: short array (min = 1, max = 48)
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List of adapter,address pairs to scan additionally
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* probe_range: short array (min = 1, max = 48)
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List of adapter,start-addr,end-addr triples to scan additionally
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Description
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-----------
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The DS1621 implements one temperature sensor. Limits can be set through the
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Overtemperature register and Hysteresis register. Each value can be
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set and read to half-degree accuracy.
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An alarm is issued when the temperature gets higher then the Overtemperature
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value; or drops below the Hysteresis value.
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It stays on until reset by the kernel module.
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All temperatures are in degrees Celcius, and are guaranteed within a
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range of -55 to +125 degrees.
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The DS1621 supplies the temperature data in a format common with chips
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like the LM75, LM77 and DS75, DS1775.
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While the DS1621 has three additional bits of accuracy
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(12 vs. 9 for the LM75), the additional bits are not supported.
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The driver also supports the DS1625. It does not distinguish the 1625 from
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the 1621. The chip prefix in /proc is always ds1621.
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The difference in the chips is that the 1621 supports additional registers
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for greater accuracy. The driver does not use these registers.
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The DS1625 has been discontinued by Dallas Semi, they recommend the
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DS1621 for new designs.
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Chip Features
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-------------
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Chip `ds1621'
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LABEL LABEL CLASS COMPUTE CLASS ACCESS MAGNITUDE
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temp NONE NONE R 1
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temp_hyst temp temp RW 1
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temp_over temp temp RW 1
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alarms NONE NONE R 0
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LABEL FEATURE SYMBOL SYSCTL FILE:OFFSET
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temp SENSORS_DS1621_TEMP temp:3
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temp_hyst SENSORS_DS1621_TEMP_HYST temp:2
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temp_over SENSORS_DS1621_TEMP_OVER temp:1
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alarms SENSORS_DS1621_ALARMS alarms:1
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