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42 Margit Schubert-While <margitsw@t-online.de>,
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52 The LM85 uses the 2-wire interface compatible with the SMBUS 2.0
53 specification. Using an analog to digital converter it measures three (3)
54 temperatures and five (5) voltages. It has four (4) 16-bit counters for
56 VID signals from the processor to the VRM. Lastly, there are three (3) PWM
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92 speed of a two wire fan, but the input conditioning circuitry is different
93 for 3-wire and 2-wire mode. For this reason, the 2-wire fan modes are not
102 The ADM1027, ADT7463 and ADT7468 have a 10-bit ADC and can therefore
112 The ADT7468 has a high-frequency PWM mode, where all PWM outputs are
113 driven by a 22.5 kHz clock. This is a global mode, not per-PWM output,
115 all 3 PWM outputs to a 22.5 kHz frequency. Conversely, setting any PWM
116 frequency below 11.3 kHz will switch all 3 PWM outputs to a frequency
120 from National (AN-1260) with some additional information about the LM85.
127 fans in a PC or embedded system. The EMC6D101, available in a 24-pin SSOP
128 package, and the EMC6D100, available in a 28-pin SSOP package, are designed
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142 The LM85 can be jumpered for 3 different SMBus addresses. There are
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170 sensors and therefore three zones (# 1, 2 and 3). Each zone has the following
173 * temp#_auto_temp_off - temperature below which fans should be off or spinning very low.
174 * temp#_auto_temp_min - temperature over which fans start to spin.
175 * temp#_auto_temp_max - temperature when fans spin at full speed.
176 * temp#_auto_temp_crit - temperature when all fans will run full speed.
185 * pwm#_auto_pwm_min - this specifies the PWM value for temp#_auto_temp_off
188 * pwm#_auto_pwm_minctl - this flags selects for temp#_auto_temp_off temperature
199 * pwm#_auto_channels - controls zone that is associated with PWM
204 ------ ------------------------------------------------
207 3 Controlled by Zone 3
208 23 Controlled by higher temp of Zone 2 or 3
209 123 Controlled by highest temp of Zone 1, 2 or 3
211 -1 PWM always 100% (full on)
212 -2 Manual control (write to 'pwm#' to set)
216 see the LM85 datasheet or Application Note AN-1260. These features
220 The number of pulses-per-rev of the fans can be set, Tach monitoring