ASM3P2856A

November 2006

ASM3P2856B

rev 0.1

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

Custom Clock generator for LCD Project

2 of 8

Pin Configuration

Pin Description

Pin#

Pin Name

Type

Description

1

XIN

I

Connection to crystal 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

Connection to crystal. If using an external reference clock, this pin must be left

unconnected.

3

P

Power supply for the entire Chip

4

P

Power supply for the entire Chip

5

GND

P

Ground to entire chip

6

GND

P

Ground to entire chip

7

CLK1

O

27.002 MHz Clock output. Refer to Input & Output Frequency Table for details.

8

CLK2

O

Reference Clock Output. Refer to Input & Output Frequency Table for details.

9

CLK3

O

65 MHz non-spread Clock output. Refer to Input & Output Frequency Table for

details.

10

CLK4

O

65 MHz Spread Spectrum Clock Output. Refer to Input & Output Frequency

Table for details.

11

CLK5

O

65 MHz Spread Spectrum Clock Output. Refer to Input & Output Frequency

Table for details.

NC

-

No Connection for ASM3P2856A

12

SS%

I

Spread percentage selection pin for ASM3P2856B. Refer to Spread Selection

Table for details. Has an internal pull down resistor

NC

-

No Connection for ASM3P2856A

13

SSON

I

Spread spectrum selection. When SSON is HIGH, spread spectrum is enabled

and when LOW, it turns off the spread spectrum. Connect the pin to ground

When Spread Spectrum feature is not required. Has an internal pull up resistor.

14

GND

P

Ground to entire chip

15

NC

-

No Connection

16

P

Power supply for the entire Chip

CLK4

XOUT

XIN

16

15

14

5

1

2

3

4

ASM3P2856A

CLK1

CLK3

5

6

7

8

9

10

11

12

13

GND

GND

CLK2

CLK5

NC

NC

GND

NC

CLK4

XOUT

XIN

16

15

14

5

1

2

3

4

ASM3P2856B

CLK1

CLK3

5

6

7

8

9

10

11

12

13

GND

GND

CLK2

CLK5

SS%

SSON

GND

NC