參數(shù)資料
型號： AMC6821SDBQR
英文描述： Analog Monitor and Control Circuit
中文描述： 模擬監(jiān)視和控制電路
文件頁數(shù)： 39/47頁
文件大小： 547K
代理商： AMC6821SDBQR
www.ti.com
P
AMC6821
SBAS386A–MAY 2006–REVISED MAY 2006
DCY-RAMP Register (Address 0x23, Value After Power-On or Reset = 0x52)
BIT
7
NAME
RAMPE
DEFAULT
0
DESCRIPTION
Ramp Enable Bit. Ignored in software-RPM control.
When RAMPE = 1, Ramp is enabled. The DCY changes to the desired value gradually
according to STEP bits and RATE bits.
When RAMPE = 0, Ramp is disabled. DCY changes to the desired target value immediately.
Default = 0.
Adjustment Step Bits.
STEP1
STEP0
0
0
0
1
1
0
1
1
DCY Updating Rate Bits in Auto Temp-Fan Control Mode.
6
5
STEP1
STEP0
1
0
Max Adjustment
1/256
2/256
4/256 (Default)
8/256
4
3
RATE2
RATE1
1
0
DCY Updates/Sec
(Auto Temp-Fan CTR)
0.0625
0.125
0.25
0.5
1 (Default)
2
4
8
RATE2
0
0
0
0
1
1
1
1
RATE1
0
0
1
1
0
0
1
1
RATE0
0
1
0
1
0
1
0
1
2
RATE0
0
1
0
THRE1
THRE0
1
0
Adjustment Threshold Bits in Auto Temp-Fan Control Mode.
THRE1
0
0
1
1
THRE0
0
1
0
1
Threshold
1/256
2/256
3/256 (Default)
4/256
This register is ignored in the software DCY control mode. This register determines how fast the PWM duty cycle
is adjusted to the desired value when the temperature changes in the automatic temperature-fan control, or
when the fan speed varies from the predetermined value in the software RPM control mode.
RAMPE: Ramp Enable bit.
This bit is ignored in the software RPM control mode.
Adjustment Step Bits: [STEP1:STEP0]
In the software RPM control, these bits specify the amount that duty cycle changes each time.
In the auto fan temperature control mode, these bits are ignored when RAMPE = 0. When RAMPE = 1, these
bits define the maximum amount that the duty cycle can change each time if the duty cycle needs to be
adjusted. For example, if the current value of the duty cycle is 50% and the desired value is 75%, the total
required increment is 25%. If the step is 1/256 (bits [STEP1:STEP0] = '00'), then the duty cycle increases by
1/256 (0.39%) each time the duty cycle is updated, and the duty cycle reaches the desired value (75%) after 64
updates. This takes eight seconds if the update rate is 8/sec (bits [RATE2:RATE0] = '111'), and takes 64
seconds if the update rate is 1/sec. (bits [RATE2:RATE0] = '100'). However, if the step is 2/256, then the time
reduces to half. If the required adjustment is less than the value specified by step bits, the actual required value
is used. For example, if the current duty cycle is 50%, the required value is 73%, and the step is 4/256, a total of
15 updates are needed. The duty cycle increases 21.875% after the first 14 updates, and increases 1.125% in
the last update.
39
Submit Documentation Feedback
相關(guān)PDF資料
PDF描述
AMD-8111 AMD-8111? HyperTransport? I/O Hub Revision Guide
AMD-8131 AMD-8131 - AMD-8131 HyperTransport PCI-X Tunnel Data Sheet
AMD-8151 AMD-8151 - Preliminary AMD-8151 HyperTransport AGP3.0 Graphics Tunnel Data Sheet
AMD64 AMD64 Architecture Programmer＇s Manual Volume 1: Application Programming
AMDATHLON AMD Athlon - AMD Athlon Processor Model 4 Revision Guide
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
AMC6821SDBQRG4 功能描述:馬達/運動/點火控制器和驅(qū)動器 Temp Monitoring and Fan Control RoHS:否 制造商:STMicroelectronics 產(chǎn)品:Stepper Motor Controllers / Drivers 類型:2 Phase Stepper Motor Driver 工作電源電壓:8 V to 45 V 電源電流:0.5 mA 工作溫度:- 25 C to + 125 C 安裝風格:SMD/SMT 封裝 / 箱體:HTSSOP-28 封裝:Tube
AMC6821SQDBQRQ1 功能描述:馬達/運動/點火控制器和驅(qū)動器 Auto Cat Temp Mon and Fan Control RoHS:否 制造商:STMicroelectronics 產(chǎn)品:Stepper Motor Controllers / Drivers 類型:2 Phase Stepper Motor Driver 工作電源電壓:8 V to 45 V 電源電流:0.5 mA 工作溫度:- 25 C to + 125 C 安裝風格:SMD/SMT 封裝 / 箱體:HTSSOP-28 封裝:Tube
AMC682J50ACK 制造商:Nissei Electric 功能描述:CAPACITOR, METALLIZED FILM, POLYESTER, 50 V, 0.0068 uF, THROUGH HOLE MOUNT
AMC69G-V30 制造商:Panasonic Industrial Company 功能描述:KNOB
AMC69R-1L0 制造商:Panasonic Industrial Company 功能描述:HOLDER
發(fā)布緊急采購，3分鐘左右您將得到回復。

采購需求

(若只采購一條型號，填寫一行即可)

發(fā)布成功！您可以繼續(xù)發(fā)布采購。也可以進入我的后臺，查看報價

發(fā)布成功！您可以繼續(xù)發(fā)布采購。也可以進入我的后臺，查看報價

*型號 *數(shù)量 廠商 批號 封裝
添加更多采購

我的聯(lián)系方式

*
*
*