DESCRIPTION
ZENIC INC. TH E ZEN2002AP cou n t s ph a se-sh ift ed sign a ls a n d u p/down pu lse sign a ls, gen er a t ed fr om r ot a r y en coder s or lin ea r sca les. TH E ZEN2002AP is pr ovided wit h a fu n ct ion wh ich m on it or s t h e in pu t sign a ls a n d det ect s a n y a bn or m a l in pu t a ccom pa n ied wit h n oise or ot h er dist u r ba n ces, so t h a t t h e r elia bilit y of cou n t ed va lu es a r e secu r ed. 1, FEATURES
24 bit bin a r y u p/down cou n t er . Cou n t er r espon se speed: 20MH z.(MAX.) ( CLK f0 = 20MH z a t 50% du t y) In pu t fr equ en cy of cou n t pu lse. P h a se-sh ift ed sign a l in pu t : A/B ph a se in pu t DC ~ 5MH z. (less t h a n f0 ~ 1/4) U p/down pu lse sign a l in pu t : U p/down in pu t DC ~ 10MH z (less t h a n f0 ~ 1/2) CLK fr equ en cy DC ~ 20MH z. (MAX.: du t y r a t io 50%) Dir ect ion r ecogn it ion for u p/down cou n t in g. Abn or m a l in pu t det ect ion cir cu it . P r eloa d r egist er for t h e u p/down cou n t er . La t ch r egist er for t h e u p/down cou n t er .
