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参数资料
| 型号： | AC164127-7 |
| 厂商： | Microchip Technology |
| 文件页数： | 10/34页 |
| 文件大小： | 0K |
| 描述： | BOARD DISPLAY CTLR PLUS S1D13517 |
| 特色产品： | AC164127-7 Graphics Controller |
| 标准包装： | 1 |
| 系列： | PICtail™ Plus |
| 主要目的： | 显示器，LCD 控制器 |
| 已用 IC / 零件： | S1D13517 |
| 主要属性： | 与 PIC32 入门套件和 Explorer 16 开发板一起使用 |
| 已供物品： | 板 |
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AN1368
TOUCH SCREEN
Some applications require the support of a touch
screen for the display. This is achieved by using a
separate touch screen on the display glass or by
selecting a display module with a touch screen. In both
cases, the touch signals must be handled by either the
microcontroller or a separate touch screen controller
(such as Microchip’s AR1000 series touch screen
controllers). These touch signals are analog and digital
signals which must be decoded to sense the touch
coordinates. Transparent touch screens are usually of
resistive type or capacitive type. Resistive touch
screens are the most commonly used and are
generally available in 4-wire or 5-wire configurations.
The touch point can be detected by measuring the
variation of the resistance of the touch screen. Only a
4-wire touch screen is explained here.
4-WIRE RESISTIVE TOUCH SCREEN
This touch screen has four signals, of which two are
purely digital signals. The other two signals are
alternately configured as both digital and analog signals.
The four signals can be directly connected to the
microcontroller I/O pins with two digital inputs and two
digital outputs, or analog pins. Figure 10 illustrates the
connections for this scheme.
When the user touches the screen, the resistance of
the screen changes. By measuring the resistance in
horizontal and vertical directions, and comparing them
with the calibrated values, the (x, y) coordinates of the
point of touch can be obtained.
When a point on the screen is touched, the x-coordinate
voltage is obtained by applying voltages across the y-
signal and measuring the analog voltage on the x-signal,
as shown in Figure 11 . The y-coordinate voltage is
obtained by applying voltage across x-signals and
FIGURE 10:
4-WIRE RESISTIVE TOUCH SCREEN
Y
PIC ? MCU
with ADC
Digital I/O
Digital I/O
Digital I/O
Digital I/O
DS01368A-page 10
X
Y
X
? 2011 Microchip Technology Inc.
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相关代理商/技术参数 |
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| AC164127-8 | 功能描述:子卡和OEM板 Graph Display Truly 5.7" 640x480 Board RoHS:否 制造商:BeagleBoard by CircuitCo 产品:BeagleBone LCD4 Boards 用于:BeagleBone - BB-Bone - Open Source Development Kit |
| AC164127-9 | 功能描述:子卡和OEM板 Graphics Display 7" 800x480 Board RoHS:否 制造商:BeagleBoard by CircuitCo 产品:BeagleBone LCD4 Boards 用于:BeagleBone - BB-Bone - Open Source Development Kit |
| AC164128 | 功能描述:子卡和OEM板 dsPICDEM Motor Cntrl PICtail Plus RoHS:否 制造商:BeagleBoard by CircuitCo 产品:BeagleBone LCD4 Boards 用于:BeagleBone - BB-Bone - Open Source Development Kit |
| AC164129 | 功能描述:子卡和OEM板 Audio PICtail Plus Daughter Board RoHS:否 制造商:BeagleBoard by CircuitCo 产品:BeagleBone LCD4 Boards 用于:BeagleBone - BB-Bone - Open Source Development Kit |
| AC164130 | 功能描述:网络开发工具 ECAN/LIN PICtail Plus Daughter Board RoHS:否 制造商:Rabbit Semiconductor 产品:Development Kits 类型:Ethernet to Wi-Fi Bridges 工具用于评估:RCM6600W 数据速率:20 Mbps, 40 Mbps 接口类型:802.11 b/g, Ethernet 工作电源电压:3.3 V |
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