51 Research and Design, Electronic Engineers website - Embedded Systems, MCU, DSP, EDA, Test and Measurement, Components, Communications, Power, Microelectronics, Semiconductors

Saturday, November 7th, 2009 at 08:50 | No comments

Categories: Embedded system

Tags: 51, keyboard, PC / AT

Short Content: Abstract:　In introduced that the PC/AT keycode characteristic in the foundation, introduced realizes the PC/AT keyboard's hardware and the software design method using AT89C2051. It has the structure to be simple, the selectivity strong, is advantageous realizes and so on merits, is suitable specially for 36 below PC/AT keyboard's application. Key word: Keyboard keycode micro controller         In domains and so on industrial control, metering equipment, have used embedded PC massively, like ADVANTECH Corporation's PC/104, AMD Corporation's E86 embedded PC ...

Sunday, October 25th, 2009 at 05:54 | No comments

Categories: Embedded system

Tags: keyboard, microcomputer

Short Content: 1 new keyboard electric circuit         The keyboard electric circuit is the monolithic integrated circuit application system most commonly used man-machine connection, often must take the many I/O ports, introduces the electric circuit using this article, may maximum limit reduce the keyboard electric circuit to use to the I/O port's spot. This electric circuit especially qualify some pins are few, the structure compact monolithic integrated circuit, may save the precious I/O resources for it.        Here take 3 I/O ...

Wednesday, September 24th, 2008 at 12:01 | No comments

Categories: SCM

Tags: 89C51, connection, keyboard

Short Content: Abstract: Introduced the computer asynchronous serial interface keyboard's special design requirements and the principle of work, the union performance history, the discussion has analyzed the question which in the 89C51 chip's structure, the function characteristic as well as the application need to pay attention, and has given the computer serial interface keyboard's hardware schematic diagram and the software flow chart.     In the information management system, the demonstration subsystem is overall system's man-machine contact surface. The monitor picture presents the situation ...