參數(shù)資料
型號： MPR084QR2
廠商： Freescale Semiconductor
文件頁數(shù)： 9/40頁
文件大?。?/td> 0K
描述： IC CTLR TOUCH SENSOR PROX 16-QFN
標準包裝： 2,500
類型： 電容性
輸入數(shù)/鍵： 8 鍵
評估套件： 可供
數(shù)據(jù)接口： I²C，串行
電源電壓： 1.8 V ~ 3.6 V
電流 - 電源： 1.62mA
工作溫度： -40°C ~ 85°C
安裝類型： 表面貼裝
封裝/外殼： 16-VQFN 裸露焊盤
供應商設備封裝： 16-QFN-EP（5x5）
包裝： 帶卷 (TR)
配用： KITMPR084EVM-ND - KIT EVAL 8-PAD TOUCH MPR084
MPR084
Sensors
Freescale Semiconductor
17
5
Low Power Configuration
5.1
Introduction
The MPR084 features a Low Power mode that can reduce the power consumption into the microamps range. This feature can
be used to both adjust the response time of the system, and change the conditions on which Low Power would be enabled.
5.2
Operation
This Low Power configuration is only active when the sensor controller is in Run2 mode. The Low Power mode decreases current
consumption by increasing the response time of the MPR084. This increase is controlled through two factors.
During normal Run2 operation of the sensor controller the Max Response Time (MRT) is calculated by taking the product of the
TASP and the primary clock. From Chapter 4 the primary clock is the (MTP + 5) ms. Since the sensor controller is in Run2, the
primary clock is also multiplied by a factor of 8. The debounce rate of the MPR084 is 4 times the sample rate thus the MRT is
represented by the following equation.
Equation 1
First, the Idle Interface Timeout (IIT) represents the total time the touch interface should remain idle before going into Low Power
mode. This value can be calculated by taking the product of the ITP, TASP and primary clock (8ms) with a factor of 64. Thus the
IIT is represented as follows:
Equation 2
Second, the Max Response Time (MRT) represents the total time the touch interface should remain inactive before scanning the
electrodes. This value can be calculated by taking the product of the SCD, TASP and primary clock (8ms) with a factor of 5. Thus
the MRT is represented as follows:
Equation 3
When in Run2 mode, the sensor controller will initially scan the electrodes at the rate of MRT1. When scanning at MRT1 and the
touch interface remains idle for the IIT period then the scan period will change to MRT2. When scanning at MRT2 and a touch is
detected the scan rate will transition back to MRT1.
Figure 20. Low Power Scan Period Transition Diagram
5.3
Configuration
Low Power Configuration is achieved through setting two values; the Idle Timeout Period and the Sleep Cycle Duration. This
functionality is described in the following section.
MRT1
MTP
5
+
8
----------------------
1
+
TASP
48ms
=
MRT2
MTP
5
+
8
----------------------
1
+
TASP
SCD
48
ms
=
ITT
MTP
5
+
8
----------------------
1
+
TASP
ITP
68ms
=
LP DISABLED
ITT PERIOD
run2 SET
TOUCH DETECTED
MRT1
MRT2
相關PDF資料
PDF描述
MPR121QR2 IC CTLR TOUCH SENSOR 20-QFN
MX674ALCWI+T IC ADC 12BIT W/REF 28-SOIC
MX7575KN+ IC ADC 8BIT MPU COMP 18-DIP
MX7582KN+ IC ADC 12BIT 4CH 28-DIP
MX7705EWE+ IC ADC 16BIT 2CH 16-SOIC
相關代理商/技術參數(shù)
參數(shù)描述
MPR0854FPXXXZ01A 功能描述:AC/DC CONVERTER 54V 800W 制造商:ge critical power 系列:MPR，耐火 零件狀態(tài):有效 類型:前端 輸出數(shù):1 電壓 - 輸入:90 ~ 264 VAC 電壓 - 輸出 1:54V 電壓 - 輸出 2:- 電壓 - 輸出 3:- 電壓 - 輸出 4:- 電流 - 輸出（最大值）:14.8A 功率（W）:800W 應用:ITE（商業(yè)） 電壓 - 隔離:3kV（3000V） 效率:88% 工作溫度:-10°C ~ 70°C（有降額） 特性:熱插拔，I2C? 接口，負載均分，PFC，PMBus?，遠程開/關，遙測，待機輸出，通用輸入 安裝類型:機架安裝 大小/尺寸:8.93" 長 x 3.40" 寬 x 1.57" 高（226.8mm x 86.4mm x 39.9mm） 所需最小負載:無 認可:- 功率（W） - 最大值:800W 標準包裝:5
MPR106M2 制造商:DEARBORN ELECTRONICS INC 功能描述:CAPACITOR MILITARY FILM
MPR106M2S1 制造商:SPEC 功能描述: 制造商:Vishay Sprague 功能描述:
MPR10JB50L0 制造商:SEI Stackpole Electronics Inc 功能描述:- Bulk 制造商:SEI Stackpole Electronics Inc 功能描述:MPR10JB50L0
MPR10JB75L0 制造商:SEI Stackpole Electronics Inc 功能描述:- Bulk 制造商:SEI Stackpole Electronics Inc 功能描述:MPR10JB75L0
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

*
*
*