Changeset 2544
- Timestamp:
- 05/17/04 20:37:12 (9 years ago)
- Files:
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- 1 modified
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lm-sensors/trunk/doc/chips/pc87360 (modified) (8 diffs)
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lm-sensors/trunk/doc/chips/pc87360
r2508 r2544 2 2 ========================= 3 3 4 Status: Beta, somewhattested.4 Status: Beta, PC87366 well tested, other chips untested. 5 5 6 6 Supported chips: … … 17 17 18 18 Thanks to Sandeep Mehta, Tonko de Rooy and Daniel Ceregatti for testing. 19 Thanks to Rudolf Marek for helping me investigate conversion issues. 19 20 20 21 … … 42 43 (PC87366) remote temperatures. 43 44 45 The driver assumes that no more than one chip is present, and the standard 46 Super I/O address is used (0x2E/0x2F). 47 44 48 45 49 Fan Monitoring … … 52 56 divider) in this case. 53 57 54 Fan readings are affected by a programmable clock divider (1, 2, 4 or 8). 55 By changing the divider, you give the readings more range or accuracy. 58 Fan readings are affected by a programmable clock divider, giving the 59 readings more range or accuracy. Usually, users have to learn how it works, 60 but this driver implements dynamic clock divider selection, so you don't 61 have to care no more. 62 63 For reference, here are a few values about clock dividers: 56 64 57 65 slowest accuracy highest … … 70 78 RPM as the lowest acceptable accuracy. 71 79 72 Note that not all RPM values can be represented. This is not only true for 73 the measured speeds, but also for the programmable low limits, so don't be 74 surprised if you try to set, say, fan1_min to 2900 and it finaly reads 75 2909. Likewise, if you try to set fan1_min to 0, it'll be set to the 76 lowest representable RPM value (depending on the divider). 80 As mentioned above, you don't have to care about this no more. 81 82 Note that not all RPM values can be represented, even when the best clock 83 divider is selected. This is not only true for the measured speeds, but 84 also for the programmable low limits, so don't be surprised if you try to 85 set, say, fan1_min to 2900 and it finaly reads 2909. 77 86 78 87 … … 103 112 104 113 The PC87366 has three additional temperature channels, based on 105 thermistors (as opposed to thermal diodes for the first t emperature114 thermistors (as opposed to thermal diodes for the first three temperature 106 115 channels). For technical reasons, these channels are held by the VLM 107 116 (voltage level monitor) logical device, not the TMS (temperature 108 measurement) one. The formula to convert the measured voltage into a 109 temperature isn't known, so the driver doesn't handle these temperature 110 channels at all yet. 117 measurement) one. As a consequence, these temperatures are exported as 118 voltages, and converted into temperatures in user-space. 111 119 112 120 … … 122 130 sensors.conf accordingly. National Semiconductor has a document with 123 131 recommended resistor values for some voltages, but this still leaves much 124 room for per motherboard specificities, unfortunately. 132 room for per motherboard specificities, unfortunately. Even worse, 133 motherboard manufacturers don't seem to care about National Semiconductor's 134 recommendations. 125 135 126 136 Each voltage measured has associated low and high limit, each of which … … 150 160 ----------- 151 161 152 There are a few unimplemented configuration options at the moment. We'll153 add them if someone needs them.154 155 162 The datasheets suggests that some values (fan mins, fan dividers) 156 163 shouldn't be changed once the monitoring has started, but we ignore that
