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AT89S52 microcontroller-based design of cymometer
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I. display annual frequency, period, pulse width of three functional II. in the numeric value displayed on the LCD display the above three functions III. with power-off protection function, when power off, reboot, previously the corresponding parameter measurement values are displayed, press ESC and start measuring, otherwise, the data previously stored inside the 24C02 does not update Circuit Description: I. chip: AT89S52, LCD12684 LCD monitor, pulse generator, Oscilloscope II. determinants of keyboard key features: Confirmation key: 0x48 (e); function Select button: 0x28 (d); Back button: 0x88 (f)
tansha1003
2016-08-23
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