MS622424 datasheet(1/11 Pages) MOSEL

Il numero della parte	MS622424

Spiegazioni elettronici	HIGH PERFORMANCE 8K x 24 BIT CMOS COLOR MAP

PDF	11 Pages

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Produttore elettronici	MOSEL [Mosel Vitelic, Corp]

Homepage	http://www.moselvitelic.com

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8-1

MS622424

MOSEL VITELIC

MS622424 Rev. 1.0 January 1995

MS622424

HIGH PERFORMANCE

8K x 24 BIT

CMOS COLOR MAP

Features

s Color Index Mode supports up to 8192 simulta-

neous colors out of 16.7 million total colors

s 24-bit RGB Mode allows full true color display

s High-speed operation capable of supporting

resolutions up 1280 x 1024

s Available in 100-pin PQFP and MQUAD

packages

s Unique “Write-Buffer” at MPU port permits

dualport-like operation using an economical

singleport memory core

s All TTL compatible inputs and outputs

s 60, 70 and 80 MHz pipelined operation

s Standard MPU Interface

Description

The MS622424 is a high performance, full

CMOS, 8K x 24, 192K-bit pipelined static memory.

This device is specifically designed for use as a

color look-up table in high resolution video display

systems. When two of these devices are operated

in parallel, the resulting system will be capable of

supporting a display of 1280 x 1024 bit mapped

color graphics with 13 bits per pixel in the Color

Index Mode or 24 bits per pixel in the RGB Mode.

In the Color Index Mode, three internal 8Kx8’s

provide 8192 simultaneous colors from a 16.7

million color palette. The palette can be partitioned

into several smaller palettes thereby supporting

multiple window display. In the RGB Mode, the 24-

bit input can be gamma corrected on one of three

gamma correction tables. The 24-bit gamma

corrected value will then be presented at the output.

This device is implemented in full CMOS for low

power consumption, and is available in an 100-pin

plastic or metal quad-flat-pack.

Functional Block Diagram

INPUT

LATCH

PIXIN(0-23)

PIX.RGB(0-1)

CEB1

CEB2

R/WB

CONFIGSEL(0-2)

CONFIGBUS(0-7)

CBLANKB

RSB

BD.REV(0-3)

MPU

CONTROL

2:1 MUX

PIXIN(0-12)

PIXIN(0-7)

PIXIN(0-12)

PIXIN(8-15)

PIXIN(0-12)

PIXIN(16-23)

PIX.RGB(MUX CONTROL)

3:1 MUX

13

ADDR 13

64X37

WRITE

FIFO

RGB 24

FIFO ADDR 13

FIFO RGB 24

8Kx8

13

8

OUTPUT

LATCH

POUT(0-23)

24

AFB

FFB

PIPE.OUT(0-3)

PIPELINE SYNCHRONIZATION PATH

CLOCK.IN

PIPE.IN(0-3)

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