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1. #Project report on decimal to bcd priority encoder k map generator#
2. #Project report on decimal to bcd priority encoder k map series#

In the next tutorial, we shall design 8×1 multiplexer and 1×8 de-multiplexer circuits using VHDL.

You can verify other combinations from the truth table. Here in the given figure, one case is highlighted when D7 input is ‘1’ all outputs a = 1, b=1, and c=1. Binary Coded Decimal or BCD is a 4-bit encoding system used to represent the decimal numbers or digits 0 to 9.

One can easily verify D0-D7 output, that is, at a time, only one output is high, and all others are low as per given input A0-A1-A2 combinations from “000” to “111”.Īs shown in the figure, the input-output waveforms look similar to the decoder because the encoder is just the reverse of the decoder. Next, compile the above program – create a waveform file with all inputs and outputs listed – apply different input combinations – save the waveform file, and finally, simulate the project. (To know more and get more details about VHDL program(s), please go through the first two tutorials, VHDL tutorial 1 and VHDL tutorial 2 of these series.) The decoder is not a sequential digital circuit, but it will be easier to build this circuit using behavioral style. Behavioral modeling style is useful in representing sequential digital circuits. Hint: Remember, it is only convenient to use K-map when the number of inputs is small. Show all the steps for the simplification. But this time, we shall use a 3 rd style that is the behavioral modeling style. 2-Derive the outputs' Boolean equations (written in simplified forms) for decimal to BCD priority encoder such that the smallest digit has the highest priority. In previous tutorials, we had used either a data-flow modeling style or structural modeling style. (Please go through step by step procedure given in VHDL-tutorial 3 to create a project, edit and compile the program, create a waveform file, simulate the program, and generate output waveforms.) Finely, we shall verify those output waveforms with the given truth table. Now we shall write a VHDL program, compile it, simulate it, and get the output in a waveform. The LS147 encodes nine data lines to four-line (8-4-2-1) BCD. Both devices have data inputs and outputs which are active at the low logic level.

They provide priority decoding of the inputs to ensure that only the highest order data line is encoded.

#Project report on decimal to bcd priority encoder k map series#

(If you are not following this VHDL tutorial series one by one, you are requested to go through all previous tutorials of these series before going ahead in this tutorial)

#Project report on decimal to bcd priority encoder k map generator#

In the previous tutorial VHDL tutorial, we designed an 8-bit parity generator and 8-bit parity checker circuits using VHDL.