HT45R37 datasheet(22/100 Pages) HOLTEK

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HT45R37

Rev. 1.10

January 29, 2010

T M R n

T i m e r / E v e n t C o u n t e r

M o d e C o n t r o l

T n O N

P r e l o a d R e g i s t e r

T i m e r / E v e n t

C o u n t e r

D a t a B u s

R e l o a d

O v e r f l o w

t o I n t e r r u p t

7 - s t a g e P r e s c a l e r

T n P S C 2 ~ T n P S C 0

( 1 / 1 ~ 1 / 1 2 8 )

8 - b i t T i m e r / E v e n t C o u n t e r

T n M 1 T n M 0

f S Y S

P F D n

T n E

F i l t e r

F i l t e r O n / O f f

C o n f i g u r a t i o n o p t i o n

8-bit Timer/Event Counter Structure (n=0, 1)

P F D 0

P F D 1

C o n f i g u r a t i o n

O p t i o n

P F D

T M R n C R e g i s t e r ( n = 0 , 1 )

b 7

E v e n t C o u n t e r a c t i v e e d g e s e l e c t

1 : c o u n t o n f a l l i n g e d g e

0 : c o u n t o n r i s i n g e d g e

T n E

T n O N

T n M 0

T n M 1

T i m e r p r e s c a l e r r a t e s e l e c t

T n P S C 2

b 0

T n P S C 2 T n P S C 1 T n P S C 0

T n P S C 1

T n P S C 0

T i m e r R a t e

1 : 1

1 : 2

1 : 4

1 : 8

1 : 1 6

1 : 3 2

1 : 6 4

1 : 1 2 8

T i m e r / E v e n t C o u n t e r c o u n t i n g e n a b l e

1 : e n a b l e

0 : d i s a b l e

O p e r a t i n g m o d e s e l e c t

T n M 1

T n M 0

n o m o d e a v a i l a b l e

e v e n t c o u n t e r m o d e

t i m e r m o d e

p u l s e w i d t h m e a s u r e m e n t m o d e

P u l s e W i d t h M e a s u r e m e n t a c t i v e e d g e s e l e c t

1 : s t a r t c o u n t i n g o n r i s i n g e d g e , s t o p o n f a l l i n g e d g e

0 : s t a r t c o u n t i n g o n f a l l i n g e d g e , s t o p o n r i s i n g e d g e

N o t i m p l e m e n t e d , r e a d a s " 0 "

Timer/Event Counter Control Register

- TMRnC

HT45R37 Datasheet(PDF) 22 Page - Holtek Semiconductor Inc

HT45R37 Datasheet(HTML) 22 Page - Holtek Semiconductor Inc

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