Low EMI Clock for Mobile VGA

2 of 9

November 2006

P2180 / 81 / 82 / 83 / 84

rev 1.1

Notice: The information in this document is subject to change without notice.

Block Diagram

Pin Diagram

Pin Description

Pin#

Pin Name

Type

Description

1

XIN

I

Connect to externally generated clock signal or crystal.

2

NC

No connect.

3

VSS

P

Ground to entire chip.

4

SRS

I

Spread Range Select. Digital logic input used to select frequency deviation (Refer

Spread Deviation Selections Table). This pin has an internal pull-up resistor.

5

ModOUT

O

Spread spectrum low EMI output.

6

VDD

P

Connect to +3.3V.

7

NC

No connect.

8

NC

No connect.

8*

XOUT

O

Crystal connection.

* Available for P2183 and P2184 only.

1

2

3

4

5

6

7

8

XIN

VSS

SRS

P2180X

P2181X

P2182X

VDD

NC

ModOUT

NC

NC

XIN

P2183X

P2184X

1

2

3

4

5

6

7

8

VSS

SRS

VDD

XOUT

ModOUT

NC

NC

XIN

XOUT

VSS

Frequency

Divider

Feedback

Divider

Modulation

Phase

Detector

Loop

Filter

VCO

Output

Divider

ModOUT

PLL

VDD

SRS

Crystal

Oscillator