参数资料
| 型号： | ADT7468ZEVB |
| 厂商： | ON Semiconductor |
| 文件页数： | 72/81页 |
| 文件大小： | 0K |
| 描述： | BOARD EVAL FOR ADT7468 |
| 标准包装： | 1 |
| 其它名称： | EVAL-ADT7468EB EVAL-ADT7468EB-ND |
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ADT7468
Table 36. Register 0x62—Enhanced Acoustics Register 1 (Power-On Default = 0x00)
Bit
<2:0>
Name
ACOU
R/W 1
Read/write
Description
These bits select the ramp rate applied to the PWM1 output. Instead of PWM1 jumping instantaneously to
its newly calculated speed, PWM1 ramps gracefully at the rate determined by these bits. This feature
enhances the acoustics of the fan being driven by the PWM1 output.
Time Slot Increase Time for 33% to 100%
000 = 1 35 sec
001 = 2 17.6 sec
010 = 3 11.8 sec
011 = 4 7 sec
100 = 8 4.4 sec
101 = 12 3 sec
110 = 24 1.6 sec
111 = 48 0.8 sec
<3>
<4>
EN1
SYNC
Read/write
Read/write
When this bit is 1, acoustic enhancement is enabled on PWM1 output.
SYNC = 1 synchronizes fan speed measurements on TACH2, TACH3, and TACH4 to PWM3. This allows up to
three fans to be driven from PWM3 output and their speeds to be measured.
SYNC = 0 synchronizes only TACH3 and TACH4 to PWM3 output.
<5>
MIN1
Read/write
When the ADT7468 is in automatic fan control mode, this bit defines whether PWM1 is off (0% duty cycle) or
at PWM1 minimum duty cycle when the controlling temperature is below its T MIN – hysteresis value.
0 = 0% duty cycle below T MIN – hysteresis.
1 = PWM1 minimum duty cycle below T MIN – hysteresis.
<6>
MIN2
Read/write
When the ADT7468 is in automatic fan speed control mode, this bit defines whether PWM2 is off (0% duty
cycle) or at PWM2 minimum duty cycle when the controlling temperature is below its T MIN – hysteresis
value.
0 = 0% duty cycle below T MIN – hysteresis.
1 = PWM 2 minimum duty cycle below T MIN – hysteresis.
<7>
MIN3
Read/write
When the ADT7468 is in automatic fan speed control mode, this bit defines whether PWM3 is off (0% duty
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.
cycle) or at PWM3 minimum duty cycle when the controlling temperature is below its T MIN – hysteresis
value.
0 = 0% duty cycle below T MIN – hysteresis.
1 = PWM3 minimum duty cycle below T MIN – hysteresis.
1
Rev. 3 | Page 72 of 81 | www.onsemi.com
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| ADT7470 | 制造商:AD 制造商全称:Analog Devices 功能描述:Temperature Sensor Hub and Fan Controller |
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