Lines Matching +full:pwm +full:- +full:outputs
42 Margit Schubert-While <margitsw@t-online.de>,
46 -----------
52 The LM85 uses the 2-wire interface compatible with the SMBUS 2.0
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
57 outputs that can be used to control fan speed.
70 A sophisticated control system for the PWM outputs is designed into the
72 three temperature sensors. Each PWM output is individually adjustable and
73 programmable. Once configured, the LM85 will adjust the PWM outputs in
75 This feature can also be disabled for manual control of the PWM's.
87 ----------------
90 Both have special circuitry to compensate for PWM interactions with the
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,
114 which means that setting any PWM frequency above 11.3 kHz will switch
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.
122 determining an optimal configuration for the automatic PWM control.
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
136 SMSC EMC6D103S is similar to EMC6D103, but does not support pwm#_auto_pwm_minctl
140 -----------------------
163 -------------------
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.
178 * PWM Control
180 There are three PWM outputs. The LM85 datasheet suggests that the
181 pwm3 output control both fan3 and fan4. Each PWM can be individually
182 configured and assigned to a zone for its control value. Each PWM can be
185 * pwm#_auto_pwm_min - this specifies the PWM value for temp#_auto_temp_off
186 temperature. (PWM value from 0 to 255)
188 * pwm#_auto_pwm_minctl - this flags selects for temp#_auto_temp_off temperature
190 pwm#_auto_pwm_min or write 0 to let them off.
194 published documentation. Setting pwm#_min_ctl in this case actually affects all
197 * PWM Controlling Zone selection
199 * pwm#_auto_channels - controls zone that is associated with PWM
204 ------ ------------------------------------------------
210 0 PWM always 0% (off)
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
221 can be optimized for PWM operation, and an offset can be applied to