text: Such an ASIC is often termed a SoC ( system-on-a-chip ) . Designers of digital ASICs use a hardware description language ( HDL ) , such as Verilog or VHDL , to describe the functionality of ASICs .
simplified: Designers of ASIC use a hardware description language ( HDL ) such as Verilog or VHDL to describe the functionality of ASIC .