Abstract:

In order to investigate the effect of the delay performance of complicated programmable logic devices on the delay in the digital system design,the mathematical model of the digital logic delay unit core was studied,the basic digital logic delay unit core was realized in hard description language and with graphics,and a multi-delay unit was put forward via the digital cote multiplex from the basic digital core.Moreover,with the help of the elec-tronic design automation software,digital delay components in different complicated programmable logic devices were simulated and analyzed.The results indicate that the delay in the digital logic design is related to three fac-tots,namely,the delay performance of the complicated programmable logic device,the selecting logic block in the placement and the routing,and the interlinking sources.Thus,theoretical and experimental foundations for the de-sign and analysis of the delay in complicated programmable logic systems were laid.

Key words: complicated programmable logic device, complicated digital logic design, delay unit core, simulation, analysis