On this page, I will introduce the decoder which changes the binary code of 4 bits into 16 bits.

It outputs "0000000000000001" when "0000" is input.
It outputs "0000000000000010" when "0001" is input.
It outputs "0000000000000100" when "0010" is input.
It outputs "0000000000001000" when "0011" is input.
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Pin lock isn't specified.
As the device, it deals with CPLD(XC9536-PC44).

Source code and Explanation Fitting report

Operating state table

Input				Output
D	C	B	A	Q15 - Q0
0	0	0	0	0000000000000001
0	0	0	1	0000000000000010
0	0	1	0	0000000000000100
0	0	1	1	0000000000001000
0	1	0	0	0000000000010000
0	1	0	1	0000000000100000
0	1	1	0	0000000001000000
0	1	1	1	0000000010000000
1	0	0	0	0000000100000000
1	0	0	1	0000001000000000
1	0	1	0	0000010000000000
1	0	1	1	0000100000000000
1	1	0	0	0001000000000000
1	1	0	1	0010000000000000
1	1	1	0	0100000000000000
1	1	1	1	1000000000000000