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Diffstat (limited to 'Documentation/hwmon/lm90')
| -rw-r--r-- | Documentation/hwmon/lm90 | 47 |
1 files changed, 30 insertions, 17 deletions
diff --git a/Documentation/hwmon/lm90 b/Documentation/hwmon/lm90 index aa4a0ec..0e84117 100644 --- a/Documentation/hwmon/lm90 +++ b/Documentation/hwmon/lm90 @@ -8,10 +8,10 @@ Supported chips: Datasheet: Publicly available at the National Semiconductor website http://www.national.com/pf/LM/LM90.html * National Semiconductor LM89 - Prefix: 'lm99' + Prefix: 'lm89' (no auto-detection) Addresses scanned: I2C 0x4c and 0x4d Datasheet: Publicly available at the National Semiconductor website - http://www.national.com/pf/LM/LM89.html + http://www.national.com/mpf/LM/LM89.html * National Semiconductor LM99 Prefix: 'lm99' Addresses scanned: I2C 0x4c and 0x4d @@ -21,18 +21,32 @@ Supported chips: Prefix: 'lm86' Addresses scanned: I2C 0x4c Datasheet: Publicly available at the National Semiconductor website - http://www.national.com/pf/LM/LM86.html + http://www.national.com/mpf/LM/LM86.html * Analog Devices ADM1032 Prefix: 'adm1032' Addresses scanned: I2C 0x4c and 0x4d - Datasheet: Publicly available at the Analog Devices website - http://www.analog.com/en/prod/0,2877,ADM1032,00.html + Datasheet: Publicly available at the ON Semiconductor website + http://www.onsemi.com/PowerSolutions/product.do?id=ADM1032 * Analog Devices ADT7461 Prefix: 'adt7461' Addresses scanned: I2C 0x4c and 0x4d - Datasheet: Publicly available at the Analog Devices website - http://www.analog.com/en/prod/0,2877,ADT7461,00.html - Note: Only if in ADM1032 compatibility mode + Datasheet: Publicly available at the ON Semiconductor website + http://www.onsemi.com/PowerSolutions/product.do?id=ADT7461 + * Maxim MAX6646 + Prefix: 'max6646' + Addresses scanned: I2C 0x4d + Datasheet: Publicly available at the Maxim website + http://www.maxim-ic.com/quick_view2.cfm/qv_pk/3497 + * Maxim MAX6647 + Prefix: 'max6646' + Addresses scanned: I2C 0x4e + Datasheet: Publicly available at the Maxim website + http://www.maxim-ic.com/quick_view2.cfm/qv_pk/3497 + * Maxim MAX6649 + Prefix: 'max6646' + Addresses scanned: I2C 0x4c + Datasheet: Publicly available at the Maxim website + http://www.maxim-ic.com/quick_view2.cfm/qv_pk/3497 * Maxim MAX6657 Prefix: 'max6657' Addresses scanned: I2C 0x4c @@ -70,25 +84,21 @@ Description The LM90 is a digital temperature sensor. It senses its own temperature as well as the temperature of up to one external diode. It is compatible -with many other devices such as the LM86, the LM89, the LM99, the ADM1032, -the MAX6657, MAX6658, MAX6659, MAX6680 and the MAX6681 all of which are -supported by this driver. +with many other devices, many of which are supported by this driver. Note that there is no easy way to differentiate between the MAX6657, MAX6658 and MAX6659 variants. The extra address and features of the MAX6659 are not supported by this driver. The MAX6680 and MAX6681 only differ in their pinout, therefore they obviously can't (and don't need to) -be distinguished. Additionally, the ADT7461 is supported if found in -ADM1032 compatibility mode. +be distinguished. The specificity of this family of chipsets over the ADM1021/LM84 family is that it features critical limits with hysteresis, and an increased resolution of the remote temperature measurement. The different chipsets of the family are not strictly identical, although -very similar. This driver doesn't handle any specific feature for now, -with the exception of SMBus PEC. For reference, here comes a non-exhaustive -list of specific features: +very similar. For reference, here comes a non-exhaustive list of specific +features: LM90: * Filter and alert configuration register at 0xBF. @@ -114,9 +124,11 @@ ADT7461: * Lower resolution for remote temperature MAX6657 and MAX6658: + * Better local resolution * Remote sensor type selection MAX6659: + * Better local resolution * Selectable address * Second critical temperature limit * Remote sensor type selection @@ -127,7 +139,8 @@ MAX6680 and MAX6681: All temperature values are given in degrees Celsius. Resolution is 1.0 degree for the local temperature, 0.125 degree for the remote -temperature. +temperature, except for the MAX6657, MAX6658 and MAX6659 which have a +resolution of 0.125 degree for both temperatures. Each sensor has its own high and low limits, plus a critical limit. Additionally, there is a relative hysteresis value common to both critical |
