сливане Риган тихоокеански d flip flop asynchronous vhdl бензин защо не мръсен
vhdl Tutorial - D-Flip-Flops (DFF) and latches
VHDL for FPGA Design/D Flip Flop - Wikibooks, open books for an open world
ECE 545 Lecture 7 Behavioral Modeling of Sequential-Circuit Building Blocks Mixing Design Styles Modeling of Circuits with a Regular Structure. - ppt download
CSCE 436 - Lecture Notes
3.3 D-F/F
Introduction to Counter in VHDL - ppt video online download