ZEN2011P Zenic, ZEN2011P Datasheet - Page 9

• Manufacturer Part Number: ZEN2011P
• Description: Programmable Universal Counter
• Manufacturer: Zenic

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Note: Both EXTA and EXTB cannot be connected to
6. Status register
con dit ion . P lea se r efer t o t h e pa r a gr a ph of "4-1.CP U
in t er fa ce" for t h e m et h od of r ea dou t t h is r egist er .
D7 D6 D5 D4 D3 D2 D1 D0 H
Th e st a t u s r egist er is u sed t o m on it or t h ein t er n a l
1
1
1
1
1
1
1
1
1
1
1
1
1
1
*) default
Hx:Hexa code
high- impedance in mode 1.
other IC output, because they cannot be
Format of the command register(mode 1)
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
1
1
1
1
1
1
1
1
1
1
1
1
1
1
**) command reset
0
0
0
0
0
0
1
1
1
1
1
1
1
1
0
0
1
1
1
1
0
0
0
0
1
1
1
1
1
1
0
0
1
1
0
0
1
1
0
0
1
1
0 92
1 93
0 94 EQA+ EQB
1 95 EQA
0 96
1 97 EQB
0 98
1 99 INTEQB,INTAI **)
0
1
0
1
0
1 9F
9A INTAI EXTB &
9B INTAI EXTB &
9C
9
9E
D
x
INTEQA
INTEQA
INTEQB
INTEQB
INTEQA
Oper a t ion
In h ibit
In h ibit
In h ibit
EXTA *)
EXTB *)
EXTA &
EXTA &
EXTB &
EXTB &
EXTA
DI
EI
DI
EI
DI
EI
**)
- 9 -
Bit descr ipt ion
D7 AI
D6 Z
D5 A
D4 B
D3 DTR Da t a r ea dy fla g of t h e r ea din g r egist er
D2 U /D Cou n t in g dir ect ion st a t u s of in t er n a l cou n t er .
D1 E QA Com pa r a t or A coin ciden t fla g
D0 U
E QB Com pa r a t or B coin ciden t fla g ( Mode 1 )
Z/CLR in pu t m on it or
It is sh own t h a t a n a bn or m a l t r a n sit ion st a t e
of ph a se-sh ift ed in pu t is det ect ed. Th is fla g is
clea r ed by t h e st a t u s r ea dou t .
It in dica t es t h e va lu e of Z/CLR t h a t is
sa m pled a t t h e r isin g edge of CLK.
A/U P in pu t sign a l m on it or
It in dica t es t h e va lu e of A/U P t h a t is
sa m pled a t t h e r isin g edge of CLK.
B/DN in pu t sign a l m on it or
It in dica t es t h e va lu e of B/DN t h a t is
sa m pled a t t h e r isin g edge of CLK.
It is sh own t h a t t h e cou n t er da t a h a s been
t r a n sfer ed t o t h e r ea din g r egist er by la t ch
execu t ion .
t h e da t a fr om t h e r ea din g r egist er .
A pr esen t
cou n t er is cou n t ed is in dica t ed.
(u p cou n t : "L" a n d down cou n t : "H ")
I t
cor r espon din g
r egist er A.
It is possible t o do t h ou gh sign a l (U ) in pu t t o
E XTB (N o.19 pin ) is dir ect ly m on it or ed.
I t
cor r espon din g
r egist er B.
U n iver sa l in pu t U m on it or
Abn or m a l in pu t det ect ion fla g
(on ly ph a se-sh ift ed pu lse in pu t )
is
is
s h ow n
s h ow n
Th is fla g is clea r ed by r ea din g
dir ect ion
t o t h e
t o t h e
t h a t
t h a t
t h e
t h e
wh er e
da t a
da t a
( m ode 0 )
cou n t
cou n t
of r efer en ce
of r efer en ce
a n
ZEN2011P
ZENIC Inc.
d a t a
d a t a
in t er n a l
is
is