slids رائع لشرح
registrs & counters
قم بالتنزيل
http://rds.yahoo.com/S=2766679/K=binary+counters/v=2/SID=w/l=WS1/R=1/IPC=sa/SHE=0/H=3/SIG=12f4f3q8a/EXP=1110321288/*-http%3A//computing.ssu.ac.kr/~choi/courses/logic/TP/Chap5.ppt