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1. MUX 4X1 VERILOG PROGRAMME BY USING 2X1 TEST BENCH GENERATOR
2. MUX 4X1 VERILOG PROGRAMME BY USING 2X1 TEST BENCH VERIFICATION

MUX 4X1 VERILOG PROGRAMME BY USING 2X1 TEST BENCH VERIFICATION

The interface allows verification components to access DUT signals

MUX 4X1 VERILOG PROGRAMME BY USING 2X1 TEST BENCH GENERATOR

an environment without the generator and hence the stimulus should be they all become active and wait for transactions to be Assign handles and start all components so that

Virtual reg_if vif // Virtual interface handle Mailbox scb_mbx // Top level mailbox for SCB MON Scoreboard s0 // Scoreboard connected to monitor This is an environment without a generator. components in it would be automatically connected and available for use This environment can then be reused later and all The environment is a container object simply to hold all verification $time, item.addr, refq.wdata, item.rdata) $display ("T=%0t Store addr=0x%0h wr=0x%0h data=0x%0h", $time, item.addr, item.wr, item.wdata) So the scoreboard has a "memory" element which updates it same data is received when the same address is read at any later point stores data it receives for each address, scoreboard helps to check if the The scoreboard is responsible to check data integrity. object and send it to the scoreboard when the transaction valid transaction and if yes, capture info into a class Check forever at every clock edge to see if there is a Mailbox scb_mbx // Mailbox connected to scoreboard captures information into a packet and sends it to the scoreboard the events happening on the interface. The monitor has a virtual interface handle with which it can monitor Else store data to addr for valid writes If reset is asserted, clear the memory element Some memory element to store data for each addr can be started during that time indicated by "ready" data is received on the next clock, and no transactions in a single clock along with the address while read Note that in this protocol, write data is provided Let us look at a practical SystemVerilog testbench example with all those verification components and how concepts in SystemVerilog has been used to create a reusable environment. In a previous article, concepts and components of a simple testbench was discussed.