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| 型号： | DM164128 |
| 厂商： | Microchip Technology |
| 文件页数： | 15/34页 |
| 文件大小： | 0K |
| 描述： | KIT DEV PICDEM TOUCH SENSE 2 |
| 视频文件： | PICDEM? Touch Sense 2 Demo Board |
| 标准包装： | 1 |
| 系列： | mTouch™ |
| 传感器类型： | 触摸，电容式 |
| 接口： | 微处理器 |
| 嵌入式： | 是，MCU，16 位 |
| 已供物品： | 板，缆线，CD |
| 已用 IC / 零件： | PIC24F |
| 产品目录页面： | 659 (CN2011-ZH PDF) |
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PICDEM? TOUCH SENSE 2 DEMO
BOARD USER ’S GUIDE
Chapter 2. The Demonstration Application
This chapter describes the demo touch sense application that is preprogrammed on the
PIC24F microcontroller and its general principles of operation. Highlights include:
2.1
INTRODUCTION TO THE TOUCH INTERFACE
Control of the touch sense features are built on the PIC24F microcontroller ’s on-chip
Charge Time Measurement Unit (CTMU) module. The CTMU consists of a constant
current source that charges the touch circuit to a fixed voltage level. When any addi-
tional capacitance is added to the circuit (from the touch of a fingertip, for example), the
fixed current source will now charge the circuit to a lower voltage. This change is how
the microcontroller detects a touch event. A more detailed description of the CTMU’s
operation is provided Section 11. “Charge Time Measurement Unit (CTMU)” of the
“ PIC24F Family Reference Manual” (DS39724).
The microcontroller uses the CTMU to monitor its analog input channels, which are in
turn, connected to capacitive touch pad sensors on the top layer of the circuit board.
The acrylic top layer protects the top layer of the PCB from direct contact, as well as
visual cues of where to touch.
The Touch Sense 2 Demo Board has four different sensor demonstration areas:
1.
2.
3.
4.
Directional Keypad (bottom) and Display (top)
Numeric Keypad
Touch Slider
“Soft” Power Control
A more detailed description of the Touch Sense 2 Demo Board’s operation is provided
FIGURE 2-1:
TOUCH SENSE AREAS ON THE TOUCH SENSE 2 BOARD
? 2008 Microchip Technology Inc.
1
Programmer
2
USB
3
4
DS51748A-page 11
相关PDF资料 |
PDF描述 |
|---|---|
| DM183026-2 | KIT EVAL MTOUCH CAPACTIVE |
| DM183026 | KIT EVALUATION PIC16F/PIC24F |
| DNGL | GROUND LUGS 1 1/8X1 3/16" |
| DO KA TYPE 21-5M | FM3 CABLE W/CONN 5M |
| DO061B-B | RELAY SSR 1A MINI-SIP |
相关代理商/技术参数 |
参数描述 |
|---|---|
| DM164130-1 | 功能描述:开发板和工具包 - PIC / DSPIC F1 Eval Platform RoHS:否 制造商:Microchip Technology 产品:Starter Kits 工具用于评估:chipKIT 核心:Uno32 接口类型: 工作电源电压: |
| DM164130-1 | 制造商:Microchip Technology Inc 功能描述:MCH1P - SKU FOR APRIL BUNDLE |
| DM164130-10 | 功能描述:开发板和工具包 - PIC / DSPIC F1 PSMC 28-PIN EVAL BOARD PLATFORM RoHS:否 制造商:Microchip Technology 产品:Starter Kits 工具用于评估:chipKIT 核心:Uno32 接口类型: 工作电源电压: |
| DM164130-2 | 功能描述:子卡和OEM板 F1 BLDC Motor Add-On RoHS:否 制造商:BeagleBoard by CircuitCo 产品:BeagleBone LCD4 Boards 用于:BeagleBone - BB-Bone - Open Source Development Kit |
| DM164130-3 | 功能描述:开发板和工具包 - PIC / DSPIC PICkit 28-Pin LIN Demo Board RoHS:否 制造商:Microchip Technology 产品:Starter Kits 工具用于评估:chipKIT 核心:Uno32 接口类型: 工作电源电压: |
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