Rev 1.0, August 7, 2008

Page 3 of 12

SL15316

11

SSCLK2 or REFCLK2

or PD#/OE/SSON#/FS

I/O

This pin can be programmed as SSCLK2 or REFCLK2.

12

SSCLK3 or REFCLK3

Output

This pin can be programmed as SSCLK3 or REFCLK3.

13

SSCLK4 or REFCLK4

Output

This pin can be programmed as SSCLK4 or REFCLK4.

14

VSS

Power

Power supply ground.

15

SSCLK5 or REFCLK5

or PD#/OE/SSON#/FS

I/O

This pin can be programmed as SSCLK5 or REFCLK5 or one of

PD#/OE/SSON#/FS functions.

16

VDDO

Power

Positive power supply for pins 12, 13 and 15. can be 3.3V to 2.5V

or 1.8V +/-10% where VDDO≤VDD.

Available REFCLK Frequencies and Dividers

All REFCLK outputs are programmed by using buffered crystal or clock input and output dividers. These

outputs can not be programmed for spread spectrum clock function. The table below gives the available

output dividers for REFCLK outputs:

Pin Number

Pin Name

Description

7

REFCLK1

Crystal or clock input reference frequency divide by 1 to 32

11

REFCLK2

Crystal or clock input reference frequency divide by 1 to 32

12

REFCLK3

Crystal or clock input reference frequency (no divider)

13

REFCLK4

Crystal or clock input reference frequency divide by 2 to 32

15

REFCLK5

Crystal or clock input reference frequency divide by 2N where

N = 2 to 16.