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  • Multiplexing LED Drive and 4x4 Keypad Sampling
    Many applications require driving LEDs along with an interface to a keypad. Implementing such designs usually involves using up significant amounts of the processors I/O lines. This application note describes a method which uses only 16 I/O pins of a PIC16C5X microcontroller to sample a 4x4 keypad
  • Interfacing a 4x4 Matrix Keypad with an 8-Bit GPIO Expander
    it as an output. INTRODUCTION * General Purpose I/O Port Register (GPIO): The GPIO register is the data port of the MCP23X08. This application note discusses interfacing a 4x4 matrix Reading from this register reads the state of the keypad with MCP23X08 8-Bit GPIO Expander. This port pins. Writing
  • Using KEELOQ (R) to generate Hopping Passwords
    The purpose of this application note is to demonstrate how KEELOQ (R) code hopping technology can be conveniently employed to implement an automatic code hopping password generator/keypad. Using a PIC12C508, the hopping code produced by an HCS300 is converted to a string of 16 hex digits
  • Medical Device Link .
    Combining label printing with two-label, adjacent-panel application, a dual-action tamp label printer-applicator is designed for in-line labeling of cartons. The Label-Aire comes with either a 203- or 300-dpi thermal/thermal-transfer print engine, which is integrated with the dual-action tamp
  • Using the Port B Interrupt on Change as an External Interrupt
    with the software programmable weak internal pull-ups, a direct interface to a keypad is possible. This is shown in application note AN552, Implementing Wake-up on Key Stroke. Another way to use the ?interrupt on change? feature would be as additional external interrupt sources. This allows PIC16CXXX devices
  • Is that your video game ringing?
    for Wireless Application Protocol phones. It works with data service from a CDMA wireless carrier such as Sprint or Verizon. A Unigraphics CAD system helped industrial designers at Innodesign in Palo Alto, Calif., create the TouchPoint 3000, a handset made by LG Electronics in Korea and marketed by Sprint
  • Control Panel for Machine and Plant Building
    and at the. same time be suitable for different areas application. scenarios. Other criteria were usability of. different controls and use of standard components. to reach positive effects with regard to the stocking. of spare parts. PROJECT DESCRIPTION. On the basis of customers' specifications
  • How to Use Widgets in Microchip Graphics Library
    in supporting 16-bit colors. Figure 1. FIGURE 1: TYPICAL SYSTEM WITH MICROCHIP GRAPHICS LIBRARY Application Layer Application Mouse Keypad Touch Screen Specific Graphics Objects Layer Message Interface 2 F NDraw Function 1 Draw Function 2 Draw Function N ... D s ) Generic i.e., 3D Button i.e., Pro ress Bar

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