Explain the libraries, commands, Architecture and test bench used in the VHDL code for counters with test bench. Also write short note on its operation.

The codes are as follows:

library IEEE use I LEE , STDLOGIC1164. ALL use I EEE, STD LOGIC UNSIGNED, ALL FPGA Projects using verclog code VHDL code entiy UPCOUNTER LS port celki in stalogic - clock input reset: in stalogic - reset input counter: ou szaloglevec 09c3 down to 03 Output 4bit counter > end UPCOUNTER architecture Behavioral of UP COUNTER IS signal counter up: stalogicvector c3 downto os begin up counter Processcalks begin cfaresingedgecelkou then escreset & then counterup clk, reset => reset, counter => counters a clock Process clock Process Process begin clk 0 end component signal reset clki stalogie signal counter: stalogicvector c3 down to aj begin dut: DOWNCOUNTER Port map celk => clk he set => heset, counter => counters a clock Process definitions clock Process Process begin clk