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7-segment digital display decoder design 7-segment digital is a pure combinational circuit

2014-03-05
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7-segment digital display decoder design 7-segment digital is a pure combinational circuit. Usually small-scale special ICs, such as 74 or 4000 series devices, can only decode decimal BCD codes. However, data processing and calculations in digital systems are binary, so the output expression is hexadecimal. In order to meet the decoding display of hexadecimal numbers, the most convenient method is to use the decoding program in FPGA/CPLD. Example As a seven-segment decoder, the 7 bits of the output signal LED7S are connected to the 7 segments of the digital tube, with the high bit on the left and the low bit on the right. For example, when LED7S outputs \"1101101\", the 7 segments of the digital tube g, f, e, d, c, b, a are connected to 1, 1, 0, 1, 1, 0, 1 respectively; the segment connected to the high level lights up, so the digital tube displays \"5\".

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