September 2003

ASM3P2183A

rev 1.0

LCD Panel EMI Reduction IC

3 of 9

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

Pin Description

Pin#

Pin Name

Type

Description

1

XIN

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

XOUT

I

Crystal connection. Input connection for an external crystal. If using an

external reference, this pin must be left unconnected.

3

GND

P

Ground to entire chip.

4

SS%

I

Spread range select. Digital logic input used to select frequency deviation

(Refer Spread Deviation Selection Table). This pin has an internal pull-up

resistor.

5

ModOUT

O

Spread spectrum low EMI output.

6

VDD

P

Power supply for the entire chip (3.3V).

7

FS0

I

Frequency range select. Digital logic input used to select frequency range

(Refer Input Frequency and Modulation Rate Table). This pin has an internal

pull-up resistor.

8

FS1

I

Frequency range select. Digital logic input used to select frequency range

(Refer Input Frequency and Modulation Rate Table). This pin has an internal

pull-up resistor.

Input Frequency and Modulation Rate Table

FS1 (pin 8)

FS0 (pin 7)

Frequency Range

0

0

6 MHz to 13 MHz

0

1

12 MHz to 25 MHz

1

0

25 MHz to 50 MHz

1

1

50 MHz to 103 MHz

Spread Deviation Selection Table

SS% (pin 4)

Spread Deviation (%)

0

- 1.25

1

± 0.42