
ICS1531 Rev N 12/1/99
December, 1999
16
Chapter 3
Pin Diagram and Listings
ICS1531 Data Sheet - Preliminary
Copyright 1999, Integrated Circuit Systems, Inc.
All rights reserved.
3.2.3.6
Ground Pins
Table 3-8.
Ground Pins
Pin Name
Pin Description
VSS
Ground for (Analog Inputs for Digital Pixel PLL Circuitry).
These pins are used to ground digital portions of the pixel PLL circuitry that receive analog inputs.
The VSSD pin must also be connected to these pins.
VSSA
Ground for Analog (Pixel PLL Circuitry).
This pin is used to ground the analog portions of the pixel PLL circuitry.
VSSAADC
Ground for Analog ADC (Circuitry).
These pins are used to ground the analog portions of the ADC.
VSSD
Ground for Digital (Pixel PLL and Circuitry for Industry-Standard 2-Wire Serial Interface).
This pin is used to ground the digital portions of the pixel PLL circuitry and the circuitry for an
industry-standard 2-wire serial interface.
VSSDADC
Ground for Digital ADC (Circuitry).
This pin is used to ground the digital portions of the ADC.
VSSMCLK
Ground for Memory Clock (Circuitry).
This pin is used to ground the circuitry for the memory clock PPL (that is, MCLK).
VSSPCLK
Ground for Panel Clock (Circuitry).
This pin is used to ground the circuitry for the panel clock PLL (that is, PNLCLK).
VSSQ
Ground for Output Drivers.
This pin is used to ground output drivers for the pixel PLL circuitry.
VSSQADC
Ground for Output Drivers for ADC.
These pins are used to ground the pixel data output drivers for the analog-to-digital converter.
VSSSUB
Ground for Substrate.
These pins are used to provide ground for the chip substrate.
VSS(TEST)
Ground (Normal Mode) or Test Mode.
Normal Mode.
– Typically, this pin must be connected to ground (the Normal mode).
– When the ICS1531 is in Normal mode, the Calibration registers 38h to 3Ch can be enabled by
using Reg 37:3. (See
Section 6.5.39, “Register 37h: PSEL”
.)
Test Mode.
For the VSS(TEST) pin’s Test-mode function, see
Table 3-4
.
VSSXTL
Ground for Crystal Oscillator.
This pin is used to ground the internal crystal oscillator circuitry.
VSS(TEST)
ICS1531
In Normal mode, use Reg 37:3 to
enable Calibration Regs 38h to 3Ch.
Normal Mode