ZEN2011P Datasheet | Zenic

Description ZENIC INC. ZEN2011P is a 24 bit pr ogr a m m a ble u n iver sa l cou n t er LSI. TH E ZEN2011P 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. Sin ce t h e cou n t er r espon se speed is a s h igh a s 8MH z(MAX),t h e ZEN2011P is u sed in a va r iet y of h igh speed ser vices in clu din g digit a l ser vo con t r ol a n d pr ecision m ea su r em en t . TH E ZEN2011P is pr ovided wit h a fu n ct ion wh ich m on it or s 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 c 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 24bit bin a r y u p/down cou n t er . Cou n t er r espon se speed: 8MH z.(MAX) ( CLK f0 = 8MH z a t 50% du t y) In pu t fr equ en cy of cou n t pu lse. Two ph a se-sh ift ed pu lses sign a l in pu t : A/B ph a se in pu t DC ~ 2MH 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 ~ 4MH z (less t h a n f0 ~ 1/2) CLK fr equ en cy DC ~ 8MH z. (MAX.: du t y r a t io 50%) Dir ect ion r ecogn it ion for u p/down cou n t 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 . Refer en ce va lu e - cou n t va lu e coin ciden ce det ect ion fu n ct ion . On -ch ip st a t u s r egist er . Cou n t er oper a t ion m ode. Qu a d/dou ble/sin gle edge eva lu a t ion . (for ph a se-sh ift ed sign a l a n d sin gle pu lse) Cou n t dir ect ion select ion . Cou n t er clea r con t r ol:syn ch r on ou s/ a syn ch r on ou s clea r . m a n d m ode Mode 0: 1 ch . r efer en ce va lu e - cou n t va lu e coin ciden ce det ect ion fu n ct ion . Mode 1: Mode 0 in st r u ct ion set pa t ible. 2 ch . r efer en ce va lu e - cou n t va lu e coin ciden ce det ect ion fu n ct ion . Logica l OR ou t pu t of ea ch coin ciden ce det ect ion s a va ila ble. In t er r u...