
Chapter 3
Pin Diagram and Listings
ICS1531 Rev N 12/1/99
December, 1999
17
Copyright 1999, Integrated Circuit Systems, Inc.
All rights reserved.
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.