ICS1531 datasheet(17/76 Pages) ICST

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Chapter 3

Pin Diagram and Listings

ICS1531 Rev N 12/1/99

December, 1999

ICS1531 Data Sheet - Preliminary

3.2.3.7

Power Pins

Table 3-9.

Power Pins

Pin Name

Pin Description

VDDA

(3.3 V) Supply for Analog (Pixel PLL Circuitry).

This pin supplies 3.3 V to the analog portions of the pixel PLL circuitry.

VDDAADC

(3.3 V) Supply for Analog ADC (Circuitry).

These pins supply 3.3 V to the analog portions of the ADC.

VDDD

(3.3 V) Supply for Digital (Pixel PLL and Industry-Standard 2-Wire Serial Bus) Circuitry.

This pin supplies 3.3 V to the digital pixel PLL and circuitry for an industry-standard 2-wire serial bus

interface.

VDDDADC

(3.3 V) Supply for Digital ADC (Circuitry).

This pin supplies 3.3 V to digital portions of the ADC.

VDDMCLK

(3.3 V) Supply for Memory Clock.

This pin supplies 3.3 V to the memory clock PLL circuitry.

VDDPCLK

(3.3 V) Supply for Panel Clock.

This pin supplies 3.3 V to the panel clock PLL circuitry.

VDDQ

(3.3 V) Supply for Output Drivers.

This pin supplies 3.3 V to the output driver circuitry for the pixel PLL.

VDDQADC

(3.3 V) Supply for Output Drivers for Analog-to-Digital Converter.

These pins supply 3.3 V to the pixel data output drivers of the ADC.

VDDXTL

(3.3V) Supply for Crystal Oscillator.

This pin supplies 3.3 V to the internal crystal oscillator circuitry.

VRB

Voltage Reference Bottom.

The ADC uses this pin as a bottom reference voltage. Typically, this pin is grounded.

VRTB,

VRTG,

VRTR

Voltage Reference Top Blue, Green, Red

• The ADC uses these pins as an alternative to the blue, green, and red top reference voltages

from the internal DACs.

• Each of these pins must connect to its own separate bypass capacitor.

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