1 Kernel driver lm83
2 ==================
3
4 Supported chips:
5
6 * National Semiconductor LM83
7
8 Prefix: 'lm83'
9
10 Addresses scanned: I2C 0x18 - 0x1a, 0x29 -
11
12 Datasheet: Publicly available at the Natio
13
14 http://www.national.com/pf/LM/L
15
16 * National Semiconductor LM82
17
18 Addresses scanned: I2C 0x18 - 0x1a, 0x29 -
19
20 Datasheet: Publicly available at the Natio
21
22 http://www.national.com/pf/LM/L
23
24 Author: Jean Delvare <jdelvare@suse.de>
25
26 Description
27 -----------
28
29 The LM83 is a digital temperature sensor. It s
30 well as the temperature of up to three externa
31 a stripped down version of the LM83 that only
32 Both are compatible with many other devices su
33 other ADM1021 clones. The main difference betw
34 in that the later can only sense the temperatu
35
36 Using the adm1021 driver for a LM83 should wor
37 will be reported instead of four.
38
39 The LM83 is only found on a handful of motherb
40 list and an unconfirmed list follow. If you ca
41 fact that any of these motherboards do actuall
42 contact us. Note that the LM90 can easily be m
43
44 Confirmed motherboards:
45 === =====
46 SBS P014
47 SBS PSL09
48 === =====
49
50 Unconfirmed motherboards:
51 =========== ==========
52 Gigabyte GA-8IK1100
53 Iwill MPX2
54 Soltek SL-75DRV5
55 =========== ==========
56
57 The LM82 is confirmed to have been found on mo
58 designs and test platforms.
59
60 The driver has been successfully tested by Mag
61 like to thank here. More testers will be of co
62
63 The fact that the LM83 is only scarcely used c
64 Most motherboards come with more than just tem
65 health monitoring. They also have voltage and
66 sensors. This means that temperature-only chip
67 secondary chips coupled with another chip such
68 chip, which provides more features. Since syst
69 temperature sensors (motherboard, processor, p
70 chips provide some temperature sensors, the se
71 won't have to handle more than two temperature
72 are sufficient, and there is no need for a fou
73 chip such as the LM83. The only case where usi
74 sense is on SMP systems, such as the above-men
75 because you want an additional temperature sen
76 CPU.
77
78 On the SBS P014, this is different, since the
79 monitoring chipset. One temperature sensor is
80 (actually measuring the LM83's own temperature
81 CPU. The two other sensors must be used to mea
82 two other points of the motherboard. We suspec
83 north and south bridges, but this couldn't be
84
85 All temperature values are given in degrees Ce
86 is given within a range of 0 to +85 degrees. R
87 given within a range of 0 to +125 degrees. Res
88 accuracy is guaranteed to 3.0 degrees (see the
89 details).
90
91 Each sensor has its own high limit, but the cr
92 all four sensors. There is no hysteresis mecha
93 recent temperature sensors.
94
95 The lm83 driver will not update its values mor
96 other second; reading them more often will do
97 'old' values.
Linux® is a registered trademark of Linus Torvalds in the United States and other countries.
TOMOYO® is a registered trademark of NTT DATA CORPORATION.