October 2006

P2560B

rev 1.3

Low Frequency EMI Reduction

2 of 8

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

Pin Configuration

Pin Description

Pin#

Pin Name

Type

Description

1

XIN / CLKIN

I

Crystal Connection or external frequency input. This pin has dual functions.

It can be connected to either an external crystal or an external reference

clock

2

VDD

P

Power Supply for the entire chip.

3

VSS

P

Ground to entire chip.

4

ModOUT

O

Spread spectrum low EMI output.

5

NC

-

No Connect

6

NC

-

No Connect

7

NC

-

No Connect

8

XOUT

O

Crystal Connection. If using an external reference, this pin must be left

unconnected.

Spread Range Selection, VDD = 3.3 V

CLKIN frequency

Spreading range

Modulation rate

20 MHz

±1.16%

25 MHz

±1.13%

27 MHz

±1.11%

30 MHz

±1.10%

32 MHz

±1.10%

(CLKIN/10) * 20.83 kHz

NC

NC

1

2

3

4

5

6

7

8

P2560B

XIN / CLKIN

VDD

VSS

ModOUT

NC

XOUT