ICS1531 datasheet(12/76 Pages) ICST

12 / 76 page

ICS1531 Rev N 12/1/99

December, 1999

Chapter 3

Pin Diagram and Listings

ICS1531 Data Sheet - Preliminary

3.2.3

Pin Listing by Functional Grouping

3.2.3.1

Clock Pins

For more information on the clock pins, see Figure 4-2 and Figure 4-3.)

Table 3-3.

Clock Pins

Name

Type

Pin Description

ADCRCLK

Input or

Output

Analog-to-Digital Converter Reference Clock.

• This pin outputs a half-rate pixel clock for latching digital output pixel data.

• Typically, this pin connects to an LCD panel controller/scaler.

• In this table, see also CLK.

ADCSYNC

Input or

Output

Analog-to-Digital Converter Sync.

• This pin provides a recovered HSYNC signal (that is, an HSYNC signal conditioned by a

Schmitt trigger) that aligns to ADCRCLK.

• For some previous ICS chips, the ADCSYNC pin is called FUNC.

CLK

Output

Clock.

• This pin outputs the full-rate pixel clock for latching digital output pixel data.

• In this table, see also ADCRCLK.

HSYNC

Input

Horizontal Sync. (See Table 3-6.)

MCLK

Output

Memory Clock.

• This pin provides an independent user-programmable clock source.

• Typically, this pin is used by LCD panel controller/scaler chips or microcontrollers.

OSCOUT

Output

Oscillator Output.

• This output from this pin is from a crystal oscillator.

• The output frequency is one of the following:

– The same frequency as the input frequency to the crystal oscillator

– The frequency that results when the input frequency is divided by a programmable

value

PNLCLK

Output

Panel Clock.

• This pin provides an independent user-programmable clock source.

• Typically, this pin is used by LCD panel controller/scaler chips or microcontrollers.

REF

Output

Reference.

This pin provides various reference line clock sync signals.

SCL

Input

Serial Clock. (See Table 3-7.)

XIN

Input

Crystal Input.

This pin accepts input from one of the following:

• A 14.31818-MHz crystal

• An external clock source

XOUT

Output

Crystal Output.

Do one of the following with this pin:

• Connect it to a 14.31818-MHz crystal.

• Leave it open for an external clock source.

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