S1

S0

CLK1

CLK2

0

0

test

test

0

1

40

25

1

0

49.152

12.288

1

1

x1.25

Reference

MK1449B

Sound/SCSI+Fast Ethernet Clock

MDS 1449B C

2

Revision 120799

Printed 11/15/00

Integrated Circuit Systems, Inc. • 525 Race Street • San Jose •CA•95126• (408)295-9800tel • www.icst.com

Pin Assignment

1

8

2

3

4

7

6

5

X1/ICLK

VDD

GND

CLK2

X2

S1

S0

CLK1

Number

Name

Type

Description

1

X1/ICLK

I

Crystal connection or clock input. Connect to a 14.31818MHz parallel resonant crystal.

2

VDD

P

Connect to +3.3V or +5V.

3

GND

P

Connect to ground.

4

CLK2

O

Clock 2 output per Table above.

5

CLK1

O

Clock 1 output per Table above.

6

S0

I

Select 0 for output clocks. Connect to GND or VDD. See table above.

7

S1

I

Select 1 for output clocks. Connect to GND or VDD. See table above.

8

X2

O

Crystal connection to a 14.31818 MHz crystal. Leave unconnected for clock input.

Pin Descriptions

Key: I = Input, O = output, P = power supply connection

Clock Decoding Table (MHz)

0 = connect directly to ground.

1 = connect directly to VDD.

In the 1,1 mode, crystals or clocks from

5 to 27 MHz can be used as an input.