August 2007

ASM3P2854B

rev 0.3

Custom Clock Generator for Fax System

2 of 8

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

Pin Diagram

Pin Description

Pin#

Pin Name

Type

Description

1

XIN / CLKIN

I

Crystal connection or external reference frequency input. This pin has dual functions. It

can be connected either to an external crystal or an external reference clock.

2

XOUT

O

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

3

VDD

P

Power supply for the core

4

VDD_FOUT

P

Power supply for the output buffers.

5

GND_FOUT

P

Ground connection for the output buffers

6

GND

P

Ground connection

7

48MHz

O

48MHz Clock Output

8

12MHz

O

12MHz Clock Output

9

33.3MHz

O

33.3 MHz low EMI Clock Output

10

33.3MHz

O

33.3 MHz low EMI Clock Output

11

S1

I

Selection Bit for Programmable Clock .See the PCLK Selection Table for details

12

66.6MHz

O

66.6 MHz low EMI Clock Output

13

66.6MHz

O

66.6 MHz low EMI Clock Output

14

S2

I

Selection Bit for Programmable Clock .See the PCLK Selection Table for details

15

PCLK

O

Programmable Clock Output

16

25MHz

O

25 MHz low EMI Clock Output

PCLK

33.3MHz SSCLK

1

2

3

4

13

14

15

16

5

6

7

8

9

10

11

12

S2

33.3MHz SSCLK

S1

66.6MHz SSCLK

25MHz SSCLK

66.6MHz SSCLK

12MHz

VDD

VDD_FOUT

GND

48MHz

XOUT

XIN / CLKIN

ASM3P2854B

GND_FOUT