參數(shù)資料
型號(hào): ADT7473ARQZ-1REEL
廠商: ANALOG DEVICES INC
元件分類: 溫度/濕度傳感器
英文描述: DIGITAL TEMP SENSOR-SERIAL, 8BIT(s), 2.50Cel, RECTANGULAR, SURFACE MOUNT
封裝: ROHS COMPLIANT, MO-137AB, QSOP-16
文件頁數(shù): 62/72頁
文件大?。?/td> 1494K
代理商: ADT7473ARQZ-1REEL
ADT7473/ADT7473-1
Rev. C | Page 65 of 72
Table 41. Register 0x63—Enhanced Acoustics Register 2 (Power-On Default = 0x00)
Bit
Name
R/W1
Description
[2:0]
ACOU3
R/W
These bits select the ramp rate applied to the PWM3 output. Instead of PWM3 jumping instantly to its
newly calculated speed, PWM3 ramps gradually at the rate determined by these bits. This effect enhances
the acoustics of the fan being driven by the PWM3 output.
Time Slot Increase
Time for 33% to 100%
000 = 1
35 sec
001 = 2
17.6 sec
010 = 3
11.8 sec
011 = 5
7 sec
100 = 8
4.4 sec
101 = 12
3 sec
110 = 24
1.6 sec
111 = 48
0.8 sec
[3]
EN3
R/W
When this bit is 1, acoustic enhancement is enabled on PWM3 output.
[6:4]
ACOU2
R/W
These bits select the ramp rate applied to the PWM2 output. Instead of PWM2 jumping instantly to its
newly calculated speed, PWM2 ramps gradually at the rate determined by these bits. This effect enhances
the acoustics of the fans being driven by the PWM2 output.
Time Slot Increase
Time for 33% to 100%
000 = 1
35 sec
001 = 2
17.6 sec
010 = 3
11.8 sec
011 = 5
7 sec
100 = 8
4.4 sec
101 = 12
3 sec
110 = 24
1.6 sec
[7]
EN2
R/W
When this bit is 1, acoustic enhancement is enabled on PWM2 output.
1 This register becomes read-only when the Configuration Register 1 lock bit is set to 1. Any further attempts to write to this register have no effect.
Table 42. PWM Minimum Duty Cycle Registers
Register Address
R/W1
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 Configuration Register 1 lock bit is set. Any further attempts to write to these registers have no effect.
Table 43. Register 0x64, Register 0x65, and Register 0x66—PWM Minimum Duty Cycle Registers
(Power-On Default = 0x80, 50% duty cycle)
Bit
Name
R/W
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).
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