Akai PDP4294LV1 Service Manual download pdf (Page 42)

Preliminary

General Description

PW171 is a highly integrated “system-on-a-chip” that interfaces

analog, digital, and video inputs in virtually any format to a flat panel

monitor or multimedia display. PW171 is pin-compatible with the

PW364.

An embedded SDRAM frame buffer and memory controller perform

frame rate conversion. Computer images from VGA to UXGA at

almost any refresh rate can be resized to fit on a fixed-frequency

target display device with any resolution up to UXGA with full 24-bit

color.

PW171 includes advanced second-generation image scaling that

provides completely programmable, horizontal and vertical image

scaling.

PW171 also includes advanced second-generation sync decoding

which provides full support for a wide variety of sync types. This

includes interlaced, progressive, sync-on-green, and TMDS DE (Data

Enable) only.

PW171 ImageProcessor supports NTSC or PAL video data with a 4:3

aspect ratio and 16:9 aspect ratio sources, such as DVD or HDTV.

Nonlinear scaling and separate horizontal and vertical scalers allow

these inputs to be resized optimally for the native resolution and

aspect ratio of the display device.

PW171 uses an integrated PLL to synchronize the display interface

timing to the input timing. This requires only a single external crystal

to generate all necessary clocks for the system.

An integrated OSD controller provides bit-mapped based OSDs with

16 colors from a 64K color palette. The OSD controller supports

transparent and translucent functions.

PW171 provides a Pulse Width Modulation (PWM) output for low cost

backlight or audio control.

With reference source code and an on-chip microprocessor,

manufacturers can develop feature-rich products with rapid time-to-

market. Programmable features include the user interface, custom

start-up screen, all automatic imaging features, and special screen

effects.

PW171 incorporates new features while maintaining backward

compatibility with the PW264 and PW364 ImageProcessors.

Features

!Second-generation Image Scaling

!Second-generation Automatic Image Optimization

!Color Space Converter for graphics inputs

!Video processing

!Picture-In-Picture (PIP)

!Frame rate conversion

!Color matrix for improved color temperature adjustment

!On-board PLLs to generate MCLK and DCLK

!On-screen display

!On-chip microprocessor

!JTAG debugging port

!8-bit, 9-bit, or 10-bit display outputs

!24-bit CPU Addressing

!Hardware 2-Wire serial bus support

!Hardware PWM output

Applications

!LCD Monitors

!Plasma Displays

!Multimedia Displays

Product Specification:

PW171 ImageProcessor

XGA/SXGA/UXGA Flat Panel Display Controller IC

d to result in a personal injury or loss of life. Customers using or selling Pixelworks devices for use in such

applications do so at their ris

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Akai PDP4294LV1 Service Manual Page 42

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