Bcd to 7 segment decoder the bcd to 7 segment decoder converts 4 bit binary to 7 bit control signal which can be displayed on 7 segment display seven display consist of 7 led segments to display 0 to 9 and a to f vhdl code bcd to 7 segment display decoder can be implemented in 2 ways. Vhdl code for bcd to 7 segment display converter here is a program for bcd to 7 segment display decoder the module takes 4 bit bcd as input and outputs 7 bit decoded output for driving the display unita seven segment display can be used to display decimal digitsthey have led or lcd elements which becomes active when the input is zerothe figure shows how different digits are displayed. Vhdl vhdl programs this decoder takes as its input four bits that represent a binary coded bcd value and generates a 7 bit output to drive a seven segment led each segment is a small led which glows when driven by an electrical signal. Design bcd to 7 segment decoder using vhdl code given below vhdl code will convert 4 bit bcd into equivalent seven segment number it will accept 4 bit input and generate seven bit output one seven segment can show zero to nine digit so there is 4 bit input