參數(shù)資料
型號(hào)： MPR083Q
廠商： Freescale Semiconductor
文件頁(yè)數(shù)： 14/35頁(yè)
文件大?。?/td> 0K
描述： IC CTLR TOUCH SENSOR PROX 16-QFN
產(chǎn)品培訓(xùn)模塊： Sensor Toolbox
產(chǎn)品目錄繪圖： MPR08(3,4)Q Top
標(biāo)準(zhǔn)包裝： 490
類型： 電容性
輸入數(shù)/鍵： 8 個(gè)滑塊
評(píng)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(yīng)商設(shè)備封裝： 16-QFN-EP（5x5）
包裝： 散裝
產(chǎn)品目錄頁(yè)面： 2808 (CN2011-ZH PDF)
配用： DEMOMPR083-ND - BOARD DEMO FOR MPR083 CTLR
KITMPR083EVM-ND - KIT EVAL 8POSITION ROTARY TOUCH
MPR083
Sensors
Freescale Semiconductor
21
8Calibration
8.1
Introduction
The MPR083 is self-calibrating. This is done both at initial start-up of the device and during run time.
8.2
Initial Start-up Conditions
Initial calibration of the MPR083 occurs every time the device resets. The first key detection cycle is used as a baseline
capacitance value for all remaining calculations. Thus, a touch is detected by taking the difference between this baseline value
and the current capacitance on the electrode.
8.3
Auto-Calibration
The MPR083 has an auto-calibration feature. This is enabled through the Rotary Configuration Register (Section 3.4), by setting
the ACE bit high. Auto calibration is done by two mechanisms. The basic auto-calibration will recalculate the baseline value after
6 sample periods. Thus the auto calibrate period can be calculate by multiplying the master clock period (in milliseconds) and the
touch acquisition sample period with a factor of 64.
Equation 6
If a touch is currently being detected the auto-calibration will not engage and calibration will be ignored. The device can also be
calibrated when a key is being touched, this is controlled by stuck key detection.
8.4
Stuck Key Detection
The Stuck Key Detection system allows the application to specify the maximum amount of time a touch should be detected before
it is calibrated into the baseline and the touch is ignored. This is controlled by setting the Stuck Key Timeout multiplication factor
(SKT). The timeout period can be calculated by multiplying the SKT, master clock period (in ms) and touch acquisition sample
period with a factor of 64.
Equation 7
When Stuck Key Detection is off a touched key will remain touched indefinitely and never be calibrated into the baseline value.
8.4.1
Stuck Key Timeout Register
The Stuck Key Timeout Register is used to determine the electrode scan period of the system. The I2C slave address of the Stuck
Key Timeout Register is 0x09.
Figure 25. Stuck Key Timeout Register
7
6
543210
R
SKT
W
Reset:
0
000000
= Unimplemented
Table 15. Stuck Key Timeout Register Field Descriptions
Field
Description
7:0
SKT
Stuck Key Timeout – The Stuck Key Timeout field selects or reports the
multiplication factor that is used to determine how often electrodes are calibrated
while a touch is being detected.
00000000 Encoding 0 – Turns off Stuck Key Detection
00000001 Encoding 1 – Sets the SKT multiplication factor to 2
~
11111111 Encoding 255 – Sets the SKT multiplication factor to 256
AutoCalibrationPeriod ms
MCP
TASP
64
=
AutoCalibrationPeriod ms
MCPTASPSKT
64
=
相關(guān)PDF資料
PDF描述
VE-243-IW-B1 CONVERTER MOD DC/DC 24V 100W
VE-JWF-MX-F1 CONVERTER MOD DC/DC 72V 75W
VE-242-IW-B1 CONVERTER MOD DC/DC 15V 100W
VE-JWD-MX-F4 CONVERTER MOD DC/DC 85V 75W
VE-241-IW-B1 CONVERTER MOD DC/DC 12V 100W
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
MPR083QR2 功能描述:電容觸摸傳感器 10 PADS 8 POSITION RoHS:否 制造商:Microchip Technology 電源電壓: 通道數(shù)量: 封裝 / 箱體: 尺寸: 溫度范圍:
MPR084 制造商:FREESCALE 制造商全稱:Freescale Semiconductor, Inc 功能描述:Proximity Capacitive Touch Sensor Controller
MPR084EJ 功能描述:電容觸摸傳感器 8 POSIT 10 PADS RoHS:否 制造商:Microchip Technology 電源電壓: 通道數(shù)量: 封裝 / 箱體: 尺寸: 溫度范圍:
MPR084EJR2 功能描述:電容觸摸傳感器 8 POSIT 10 PADS RoHS:否 制造商:Microchip Technology 電源電壓: 通道數(shù)量: 封裝 / 箱體: 尺寸: 溫度范圍:
MPR084Q 功能描述:電容觸摸傳感器 4 POSITION ROTARY & RoHS:否 制造商:Microchip Technology 電源電壓: 通道數(shù)量: 封裝 / 箱體: 尺寸: 溫度范圍:
發(fā)布緊急采購(gòu)，3分鐘左右您將得到回復(fù)。

采購(gòu)需求

(若只采購(gòu)一條型號(hào)，填寫一行即可)

發(fā)布成功！您可以繼續(xù)發(fā)布采購(gòu)。也可以進(jìn)入我的后臺(tái)，查看報(bào)價(jià)

發(fā)布成功！您可以繼續(xù)發(fā)布采購(gòu)。也可以進(jìn)入我的后臺(tái)，查看報(bào)價(jià)

*型號(hào) *數(shù)量 廠商 批號(hào) 封裝
添加更多采購(gòu)

我的聯(lián)系方式

*
*
*