參數(shù)資料
型號: KITMPR083EVM
廠商: Freescale Semiconductor
文件頁數(shù): 15/35頁
文件大小: 0K
描述: KIT EVAL 8POSITION ROTARY TOUCH
標(biāo)準(zhǔn)包裝: 1
傳感器類型: 觸摸,電容式
傳感范圍: 8 個按鈕/鍵
接口: I²C
電源電壓: 1.8 V ~ 3.6 V
嵌入式: 是,其它
已供物品: 板,纜線,CD
已用 IC / 零件: MPR083
相關(guān)產(chǎn)品: MPR083EJR2CT-ND - IC CTLR TOUCH SENSR PROX 16TSSOP
MPR083QR2-ND - IC CTLR TOUCH SENSOR PROX 16-QFN
MPR083Q-ND - IC CTLR TOUCH SENSOR PROX 16-QFN
MPR083EJR2TR-ND - IC CTLR TOUCH SENSR PROX 16TSSOP
MPR083EJ-ND - IC CTLR TOUCH SENSR PROX 16TSSOP
MPR083
Sensors
22
Freescale Semiconductor
9
Sensitivity
9.1
Introduction
The MPR083 can operate in a variety of environments with a variety of different electrode patterns. Because of this it is necessary
to adjust the relative sensitivity of the sensor controller. Usually this requires fine tuning in any final application.
There are many factors that must be taken into account, but much of the time this value is relative to the capacitance changes
generated by a touch. Since capacitance is directly proportional to the dielectric constant of the material and the area of the pad,
while inversely proportional to the distance between pads these are the primary factors.
Equation 8
As the relative capacitance rises the sensitivity setting of the MPR083 should be adjusted accordingly. Thus a very high sensitivity
value represents a large A and a small d.
9.2
Adjusting the Sensitivity
The sensitivity of the MPR083 is adjusted by varying the Sensitivity Threshold Register.
9.2.1
Sensitivity Threshold Register
The sensitivity register allows the sensitivity of the MPR083 to be adjusted for any situation. The I2C slave address of the
Sensitivity Threshold Register is 0x04.
Figure 26. Sensitivity Threshold Register
7
6
543210
R
SL
W
Reset:
0
000000
= Unimplemented
Table 16. Sensitivity Threshold Register Field Descriptions
Field
Description
7:0
ST
Sensitivity Threshold – The Sensitivity Threshold selects or reports the sensitivity
setting of the Sensor Controller. The resulting value must be in the range 1 to 64
units. If the value is outside of this range the ST will be set to 00111111.
00000000 Encoding 0 – Sets the sensitivity to level 1
~
00111111 Encoding 63 – Sets the sensitivity to level 64
C
ke0A
d
------------
=
相關(guān)PDF資料
PDF描述
RCC12DREN-S734 CONN EDGECARD 24POS .100 EYELET
VE-J7P-EZ CONVERTER MOD DC/DC 13.8V 25W
GBM28DSEN CONN EDGECARD 56POS .156 EYELET
ADR06WARZ-RL IC VREF SERIES PREC 3V 8SOIC
RCC12DREH-S734 CONN EDGECARD 24POS .100 EYELET
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
KITMPR084EVM 功能描述:光學(xué)傳感器開發(fā)工具 8 TOUCH PADS RoHS:否 制造商:ams 工具用于評估: 接口類型: 最大工作溫度:
KITMPR121EVM 功能描述:觸摸傳感器開發(fā)工具 MPR121 Sensor Tool Box RoHS:否 制造商:Cypress Semiconductor 工具用于評估: 接口類型: 工作電壓: 最大工作溫度:
KITMPR121EVM 制造商:Freescale Semiconductor 功能描述:Sensor Toolbox Proximity Sensor Kit
KITMPVZ5004EVK 功能描述:壓力傳感器開發(fā)工具 WATER LEVEL BOARD RoHS:否 制造商:Freescale Semiconductor 工具用于評估:MPL3115A2 接口類型:USB 最大工作溫度:
KITMPXA6115AEVB 功能描述:壓力傳感器開發(fā)工具 Sensor Toolbx Pressu Sensor Developmt brd RoHS:否 制造商:Freescale Semiconductor 工具用于評估:MPL3115A2 接口類型:USB 最大工作溫度: