參數(shù)資料
型號: ADT7476ARQZ-REEL7
廠商: ANALOG DEVICES INC
元件分類: 溫度/濕度傳感器
英文描述: DIGITAL TEMP SENSOR-SERIAL, 10BIT(s), 2.50Cel, RECTANGULAR, SURFACE MOUNT
封裝: ROHS COMPLIANT, MO-137AE, QSOP-24
文件頁數(shù): 37/72頁
文件大?。?/td> 5219K
代理商: ADT7476ARQZ-REEL7
ADT7476
Rev. B | Page 42 of 72
MUX
05382-052
REAR CHASSIS
FRONT CHASSIS
CPU FAN SINK
REMOTE 1 =
AMBIENT TEMP
LOCAL =
VRM TEMP
REMOTE 2 =
CPU TEMP
PWM1
PWM2
TACH1
TACH2
TACH3
PWM3
MUX
THERMAL CALIBRATION
0%
TMIN
TRANGE
THERMAL CALIBRATION
100%
0%
TMIN
TRANGE
THERMAL CALIBRATION
100%
0%
TMIN
TRANGE
PWM
MIN
PWM
MIN
PWM
MIN
100%
PWM
GENERATOR
PWM
GENERATOR
TACHOMETER 3
AND 4
MEASUREMENT
TACHOMETER 1
MEASUREMENT
TACHOMETER 2
MEASUREMENT
RAMP
CONTROL
(ACOUSTIC
ENHANCEMENT)
RAMP
CONTROL
(ACOUSTIC
ENHANCEMENT)
RAMP
CONTROL
(ACOUSTIC
ENHANCEMENT)
PWM
GENERATOR
PWM
CONFIG
PWM
CONFIG
PWM
CONFIG
Figure 51. Assigning Temperature Channels to Fan Channels
Mux Configuration Example
This is an example of how to configure the mux in a system
using the ADT7476 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
Bits [7:5] (BHVR), PWM1 Configuration Register 0x5C.
101 = Fastest speed calculated by local and Remote 2
temperature controls PWM1
Bits [7:5] (BHVR), PWM2 Configuration Register 0x5D.
000 = Remote 1 temperature controls PWM2
Bits [7:5] (BHVR), PWM3 Configuration Register 0x5E.
000 = Remote 1 temperature controls PWM3
These settings configure the mux, as shown in Figure 52.
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