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전자부품 데이터시트 검색엔진 |
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전자부품 데이터시트 검색엔진 |
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ADT7467ARQZ-R7 데이터시트(PDF) 41 Page - ON Semiconductor |
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ADT7467ARQZ-R7 데이터시트(HTML) 41 Page - ON Semiconductor |
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41 / 77 page  ADT7467 Rev. 3 | Page 41 of 77 | www.onsemi.com Mux Configuration Example This is an example of how to configure the mux in a system using the ADT7467 to control three fans. The CPU fan sink is controlled by PWM1, the front chassis fan is controlled by PWM2, and the rear chassis fan is controlled by PWM3. The mux is configured for the following fan control behavior: • PWM1 (CPU fan sink) is controlled by the fastest speed calculated by the local (VRM temperature) and Remote 2 (processor) temperature. In this case, the CPU fan sink is also used to cool the VRM. • PWM2 (front chassis fan) is controlled by the Remote 1 temperature (ambient). • PWM3 (rear chassis fan) is controlled by the Remote 1 temperature (ambient). Example Mux Settings <7:5> (BHVR), PWM1 Configuration Register 0x5C 101 = fastest speed calculated by local and Remote 2 temperature controls PWM1 <7:5> (BHVR), PWM2 Configuration Register 0x5D 000 = Remote 1 temperature controls PWM2 <7:5> (BHVR), PWM3 Configuration Register 0x5E 000 = Remote 1 temperature controls PWM3 These settings configure the mux as shown in Figure 56. REAR CHASSIS FRONT CHASSIS CPU FAN SINK LOCAL = VRM TEMP PWM1 PWM2 TACH1 TACH2 TACH3 PWM3 REMOTE 1 = AMBIENT TEMP REMOTE 2 = CPU TEMP THERMAL CALIBRATION 0% TMIN TRANGE THERMAL CALIBRATION 100% 0% TMIN TRANGE THERMAL CALIBRATION 100% 0% TMIN TRANGE TACHOMETER 1 MEASUREMENT PWM CONFIG PWM MIN RAMP CONTROL (ACOUSTIC ENHANCEMENT) PWM GENERATOR TACHOMETER 2 MEASUREMENT PWM CONFIG PWM MIN RAMP CONTROL (ACOUSTIC ENHANCEMENT) PWM GENERATOR TACHOMETER 3 AND 4 MEASUREMENT PWM CONFIG PWM MIN RAMP CONTROL (ACOUSTIC ENHANCEMENT) PWM GENERATOR 100% MUX Figure 56. Mux Configuration Example |
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