mirror of
https://github.com/lm-sensors/lm-sensors.git
synced 2026-10-23 11:54:33 +00:00
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'
|
|
=====================
|
|
|
|
Status: Complete and tested, alarms experimental
|
|
|
|
Supported chips:
|
|
* Dallas Semiconductor DS1621
|
|
Prefix: `ds1621'
|
|
Addresses scanned: I2C 0x48 - 0x4f (inclusive)
|
|
Datasheet: Publicly available at the Dallas Semiconductor website
|
|
http://www.dalsemi.com
|
|
* Dallas Semiconductor DS1625
|
|
Prefix: `ds1621'
|
|
Addresses scanned: I2C 0x48 - 0x4f (inclusive)
|
|
Datasheet: Publicly available at the Dallas Semiconductor website
|
|
http://www.dalsemi.com
|
|
|
|
Author: Christian W. Zuckschwerdt <zany@triq.net>
|
|
|
|
|
|
Module Parameters
|
|
-----------------
|
|
|
|
* force: short array (min = 1, max = 48)
|
|
List of adapter,address pairs to boldly assume to be present
|
|
* force_ds1621: short array (min = 1, max = 48)
|
|
List of adapter,address pairs which are unquestionably assumed to contain
|
|
a `ds1621' chip
|
|
* ignore: short array (min = 1, max = 48)
|
|
List of adapter,address pairs not to scan
|
|
* ignore_range: short array (min = 1, max = 48)
|
|
List of adapter,start-addr,end-addr triples not to scan
|
|
* probe: short array (min = 1, max = 48)
|
|
List of adapter,address pairs to scan additionally
|
|
* probe_range: short array (min = 1, max = 48)
|
|
List of adapter,start-addr,end-addr triples to scan additionally
|
|
|
|
|
|
Description
|
|
-----------
|
|
|
|
The DS1621 implements one temperature sensor. Limits can be set through the
|
|
Overtemperature register and Hysteresis register. Each value can be
|
|
set and read to half-degree accuracy.
|
|
An alarm is issued when the temperature gets higher then the Overtemperature
|
|
value; or drops below the Hysteresis value.
|
|
|
|
It stays on until reset by the kernel module.
|
|
|
|
All temperatures are in degrees Celcius, and are guaranteed within a
|
|
range of -55 to +125 degrees.
|
|
|
|
The DS1621 supplies the temperature data in a format common with chips
|
|
like the LM75, LM77 and DS75, DS1775.
|
|
While the DS1621 has three additional bits of accuracy
|
|
(12 vs. 9 for the LM75), the additional bits are not supported.
|
|
|
|
The driver also supports the DS1625. It does not distinguish the 1625 from
|
|
the 1621. The chip prefix in /proc is always ds1621.
|
|
The difference in the chips is that the 1621 supports additional registers
|
|
for greater accuracy. The driver does not use these registers.
|
|
The DS1625 has been discontinued by Dallas Semi, they recommend the
|
|
DS1621 for new designs.
|
|
|
|
|
|
Chip Features
|
|
-------------
|
|
|
|
Chip `ds1621'
|
|
LABEL LABEL CLASS COMPUTE CLASS ACCESS MAGNITUDE
|
|
temp NONE NONE R 1
|
|
temp_hyst temp temp RW 1
|
|
temp_over temp temp RW 1
|
|
alarms NONE NONE R 0
|
|
|
|
LABEL FEATURE SYMBOL SYSCTL FILE:OFFSET
|
|
temp SENSORS_DS1621_TEMP temp:3
|
|
temp_hyst SENSORS_DS1621_TEMP_HYST temp:2
|
|
temp_over SENSORS_DS1621_TEMP_OVER temp:1
|
|
alarms SENSORS_DS1621_ALARMS alarms:1
|