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Based on kernel version 3.2. Page generated on 2012-01-05 23:28 EST.

1	Kernel driver lm75
2	==================
3	
4	Supported chips:
5	  * National Semiconductor LM75
6	    Prefix: 'lm75'
7	    Addresses scanned: I2C 0x48 - 0x4f
8	    Datasheet: Publicly available at the National Semiconductor website
9	               http://www.national.com/
10	  * National Semiconductor LM75A
11	    Prefix: 'lm75a'
12	    Addresses scanned: I2C 0x48 - 0x4f
13	    Datasheet: Publicly available at the National Semiconductor website
14	               http://www.national.com/
15	  * Dallas Semiconductor DS75, DS1775
16	    Prefixes: 'ds75', 'ds1775'
17	    Addresses scanned: none
18	    Datasheet: Publicly available at the Dallas Semiconductor website
19	               http://www.maxim-ic.com/
20	  * Maxim MAX6625, MAX6626
21	    Prefixes: 'max6625', 'max6626'
22	    Addresses scanned: none
23	    Datasheet: Publicly available at the Maxim website
24	               http://www.maxim-ic.com/
25	  * Microchip (TelCom) TCN75
26	    Prefix: 'lm75'
27	    Addresses scanned: none
28	    Datasheet: Publicly available at the Microchip website
29	               http://www.microchip.com/
30	  * Microchip MCP9800, MCP9801, MCP9802, MCP9803
31	    Prefix: 'mcp980x'
32	    Addresses scanned: none
33	    Datasheet: Publicly available at the Microchip website
34	               http://www.microchip.com/
35	  * Analog Devices ADT75
36	    Prefix: 'adt75'
37	    Addresses scanned: none
38	    Datasheet: Publicly available at the Analog Devices website
39	               http://www.analog.com/adt75
40	  * ST Microelectronics STDS75
41	    Prefix: 'stds75'
42	    Addresses scanned: none
43	    Datasheet: Publicly available at the ST website
44	               http://www.st.com/internet/analog/product/121769.jsp
45	  * Texas Instruments TMP100, TMP101, TMP105, TMP75, TMP175, TMP275
46	    Prefixes: 'tmp100', 'tmp101', 'tmp105', 'tmp175', 'tmp75', 'tmp275'
47	    Addresses scanned: none
48	    Datasheet: Publicly available at the Texas Instruments website
49	               http://www.ti.com/product/tmp100
50	               http://www.ti.com/product/tmp101
51	               http://www.ti.com/product/tmp105
52	               http://www.ti.com/product/tmp75
53	               http://www.ti.com/product/tmp175
54	               http://www.ti.com/product/tmp275
55	
56	Author: Frodo Looijaard <frodol@dds.nl>
57	
58	Description
59	-----------
60	
61	The LM75 implements one temperature sensor. Limits can be set through the
62	Overtemperature Shutdown register and Hysteresis register. Each value can be
63	set and read to half-degree accuracy.
64	An alarm is issued (usually to a connected LM78) when the temperature
65	gets higher then the Overtemperature Shutdown value; it stays on until
66	the temperature falls below the Hysteresis value.
67	All temperatures are in degrees Celsius, and are guaranteed within a
68	range of -55 to +125 degrees.
69	
70	The LM75 only updates its values each 1.5 seconds; reading it more often
71	will do no harm, but will return 'old' values.
72	
73	The original LM75 was typically used in combination with LM78-like chips
74	on PC motherboards, to measure the temperature of the processor(s). Clones
75	are now used in various embedded designs.
76	
77	The LM75 is essentially an industry standard; there may be other
78	LM75 clones not listed here, with or without various enhancements,
79	that are supported. The clones are not detected by the driver, unless
80	they reproduce the exact register tricks of the original LM75, and must
81	therefore be instantiated explicitly. The specific enhancements (such as
82	higher resolution) are not currently supported by the driver.
83	
84	The LM77 is not supported, contrary to what we pretended for a long time.
85	Both chips are simply not compatible, value encoding differs.
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