HT46R01 datasheet(28/60 Pages) HOLTEK

28 / 60 page

HT46R01/HT46R02/HT46R03

Rev. 1.00

September 21, 2007

A D C R R e g i s t e r

S e l e c t A / D c h a n n e l

b 7

b 0

S T A R T

P C R 2 P C R 1 P C R 0 A C S 2 A C S 1 A C S 0

A C S 1

A C S 2

A C S 0

: A N 0

: A N 1

: A N 2

: A N 3

: u n d e f i n e d , m u s t n o t b e u s e d

P o r t B A / D c h a n n e l c o n f i g u r a t i o n s

P C R 2

P C R 1

P C R 0

: P o r t B A / D c h a n n e l s - a l l o f f

: P B 0 e n a b l e d a s A N 0

: P B 0 ~ P B 1 e n a b l e d a s A N 0 ~ A N 1

: P B 0 ~ P B 2 e n a b l e d a s A N 0 ~ A N 2

: P B 0 ~ P B 3 e n a b l e d a s A N 0 ~ A N 3

E n d o f A / D c o n v e r s i o n f l a g

1 : n o t e n d o f A / D c o n v e r s i o n - A / D c o n v e r s i o n w a i t i n g o r i n p r o g r e s s

0 : e n d o f A / D c o n v e r s i o n - A / D c o n v e r s i o n e n d e d

S t a r t t h e A / D c o n v e r s i o n

0 ® 1 ® 0 : S t a r t

0 ® 1 : R e s e t A / D c o n v e r t e r a n d s e t E O C B t o " 1 "

E O C B

ADCR Register

A C S R R e g i s t e r

S e l e c t A / D c o n v e r t e r c l o c k s o u r c e

b 7

b 0

T E S T

A D C S 1 A D C S 0

A D C S 1

A D C S 0

: s y s t e m c l o c k / 2

: s y s t e m c l o c k / 8

: s y s t e m c l o c k / 3 2

: u n d e f i n e d

: s y s t e m c l o c k

: s y s t e m c l o c k / 4

: s y s t e m c l o c k / 1 6

: u n d e f i n e d

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

F o r t e s t m o d e u s e o n l y

A D C S 2

ACSR Register

fSYS

A/D Clock Period (tAD)/ADCS0~ADCS2

fSYS

100

fSYS/2

000

fSYS/4

101

fSYS/8

001

fSYS/16

110

fSYS/32

010

1MHz

ms2ms4ms8ms16ms32ms

2MHz

500ns*

ms2ms4ms8ms16ms

4MHz

250ns*

500ns*

ms2ms4ms8ms

8MHz

125ns*

250ns*

500ns*

ms2ms4ms

12MHz

62.5ns*

0.125ns*

250ns*

500ns*

ms2ms

A/D Clock Period Examples

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