- 您現(xiàn)在的位置：買賣IC網(wǎng) > PDF目錄17116 > KITMPR083EVM (Freescale Semiconductor)KIT EVAL 8POSITION ROTARY TOUCH PDF資料下載
參數(shù)資料
| 型號： | KITMPR083EVM |
| 廠商： | Freescale Semiconductor |
| 文件頁數(shù)： | 2/35頁 |
| 文件大?。?/td> | 0K |
| 描述： | KIT EVAL 8POSITION ROTARY TOUCH |
| 標準包裝： | 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 |
第1頁當前第2頁第3頁第4頁第5頁第6頁第7頁第8頁第9頁第10頁第11頁第12頁第13頁第14頁第15頁第16頁第17頁第18頁第19頁第20頁第21頁第22頁第23頁第24頁第25頁第26頁第27頁第28頁第29頁第30頁第31頁第32頁第33頁第34頁第35頁
MPR083
Sensors
10
Freescale Semiconductor
3
Touch Detection
3.1
Introduction
When using a capacitive touch sensor system the raw data must be filtered and interpreted. This process can be done many
different ways but the method used in the MPR083 is explained in this chapter.
3.2
Understanding the Basics
The rotary interface has to distinguish touch status through varying user conditions (different finger sizes in bare hands or gloves)
and environmental conditions (electrical and RF noise, sensor contamination with dirt or moisture).
The rotary circuitry reports touch status as one of the following two conditions:
1.
Rotary untouched
2.
Rotary touched in one of eight positions.
The rotary is only touched in one position, ideally near the middle of one of the eight pads. If a touch occurs between pads,
untouched will be reported.
3.3
Conditional Output Scenarios
Since it is unlikely that in a real world case a single independent touch will occur two specific multi-touch response cases are
outlined. Methods for changing the sensitivity of the device will be discussed in another Chapter, but the important part is that the
sensitivity is determined by the strength of an input signal. If more than one input signal is above the selected sensitivity then the
touch sensor controller interprets this in a specific way. This functionality is broken down into two different cases.
3.3.1
Simultaneous Touches
Any time two touches are detected at the same time the touch sensor controller recognizes this case and accounts for it. Any
time more than one key is pressed the touches are ignored. Thus the touch sensor controller will show the rotary as untouched.
In most cases one of the two electrodes will receive a stronger signal than the other. If the difference in capacitance is statistically
significant between the pad with the stronger signal will be reported.
This functionality is sometimes called 1-Key Lockout.
3.3.2
Sequential Touches
Another case is when one rotary pad is touched and held and a second rotary pad is then touched and held. For this situation
the second touch will be ignored and the first touch will continue to be reported.
If the second touch is released before the first touch then the second touch will be completely ignored. But, if the first touch is
released before the second then the system will report that the first key is released and that the second key is now touched. This
functionality is sometimes called 2-Key Rollover.
3.4
Rotary Configuration Register
The Rotary Configuration Register configures a variety of the MPR083 features. Each of these features is described in following
sections. The I2C slave address of the Rotary Configuration Register is 0x03.
Figure 14. Rotary Configuration Register
7
6
543210
R
RSE
00
ACE
RRBE
RTBE
0
RE
W
Reset:
1
0
000001
= Unimplemented
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: |
發(fā)布緊急采購，3分鐘左右您將得到回復。