ICS1524

6

ICS1524 Rev C 01/31/2003

Detailed Register Description

Name:

Input Control

Register:

0 h

Index:

Read / Write

Bit

Name

Description

0

PDen

RESERVED

1

PD_Pol

Input MUX Control

2

Ref_Pol

Phase/Frequency Detector External Reference Polarity —

Edge of input signal on which Phase Detector triggers.

0 = Rising Edge (default)

1 = Falling Edge

3

Fbk_Pol

External Reference Feedback Polarity — Edge of EXTFB (pin 6) signal on which

Phase/Frequency Detector triggers when external feedback is used (Reg0 [4]=1).

0 = Positive Edge (default)

1 = Negative Edge

4

Fbk_Sel

External Feedback Select

0 = Internal Feedback (default)

1 = External Feedback

5

Func_Sel

Function Output Select — Selects re-clocked output to FUNC (pin 15).

0 = Recovered HSYNC (default). Regenerated HSYNC output.

1 = External HSYNC. Schmitt-trigger conditioned input from HSYNC (pin 7).

6

EnPLS

Enable LOCK/REF (pin14) Output

7

EnDLS

Bit Name Bit # Reset Value Description

PDen

0

1

Phase detector Enable

PD_Pol

1

0

Phase/Frequency Detector Input MUX Control

Ref_Pol

2

0

Phase/Frequency Detector External Reference Polarity

Fbk_Pol

3

0

External Reference Feedback Polarity

Fbk_Sel

4

0

External Feedback Select

Func_Sel

5

0

Function Output Select

EnPLS

6

1

Enable PLL Lock Status Output on LOCK/REF pin

EnDLS

7

0

Enable DPA Lock Status Output on LOCK/REF pin

L

O

P

_

D

P

1

t

i

B

n

e

D

P

5

n

i

P

r

o

t

c

e

t

e

D

y

c

n

e

u

q

e

r

F

/

e

s

a

h

P

.

.

.

h

t

i

w

d

e

i

l

p

p

u

S

t

u

p

n

I

00

n

I

C

S

O

01

n

I

C

N

Y

S

H

10

n

I

C

N

Y

S

H

11

n

I

C

S

O

S

L

P

n

ES

L

D

n

EL

E

S

_

N

I)

4

1

(

F

E

R

/

K

C

O

L

00

A

/

N0

01

A

/

Ne

s

i

w

r

e

h

t

o

0

,

d

e

k

c

o

l

A

P

D

f

i

1

10

A

/

Ne

s

i

w

r

e

h

t

o

0

,

d

e

k

c

o

l

L

L

P

f

i

1

11

0

r

e

g

g

i

r

t

t

t

i

m

h

c

S

t

s

o

P

l

o

P

_

f

e

R

R

O

X

)

7

(

C

N

Y

S

H

11

1

s

o

÷

v

i

D

_

c

s

O