參數資料
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: 62/72頁
文件大?。?/td> 5219K
代理商: ADT7476ARQZ-REEL7
ADT7476
Rev. B | Page 65 of 72
Table 40. PWMx Minimum Duty Cycle Registers
Register Address
Description
Power-On Default
0x64
R/W
PWM1 minimum duty cycle
0x80 (50% duty cycle)
0x65
R/W
PWM2 minimum duty cycle
0x80 (50% duty cycle)
0x66
R/W
PWM3 minimum duty cycle
0x80 (50% duty cycle)
1 These registers become read-only when the ADT7476 is in automatic fan control mode.
Table 41. Register 0x64, Register 0x65, Register 0x66—PWMx Minimum Duty Cycle Registers (Power-On Default = 0x80;
50% duty cycle)
Bit
Name
Description
[7:0]
PWM duty cycle
R/W
These bits define the PWMMIN duty cycle for PWMx.
0x00 = 0% duty cycle (fan off ).
0x40 = 25% duty cycle.
0x80 = 50% duty cycle.
0xFF = 100% duty cycle (fan full speed).
1 These registers become read-only when the ADT7476 is in automatic fan control mode.
Table 42. TMIN Registers1
Register Address
Description
Power-On Default
0x67
R/W
Remote 1 temperature TMIN
0x5A (90°C)
0x68
R/W
Local temperatue TMIN
0x5A (90°C)
0x69
R/W
Remote 2 temperature TMIN
0x5A (90°C)
1 These are the TMIN registers for each temperature channel. When the temperature measured exceeds TMIN, the appropriate fan runs at minimum speed and increases
with temperature according to TRANGE.
2 These registers become read-only when the Configuration Register 1 LOCK bit is set. Any subsequent attempts to write to these registers fail.
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