YGV619 View Datasheet(PDF) - LSI Corporation

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Description

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YGV619

Advanced Video Display Processor 6

LSI Corporation  

YGV619

s Example of System Configuration

AVDP6 is a display control device that operates as 16 bit or 32 bit I/O device on the external general purpose bus

of CPU on the system in which the device is built-in. Because CPU I/F of AVDP6 uses asynchronous I/F, it can be

controlled with general purpose SRAM I/F. SDRAM is connected on the local bus of AVDP6 to be used as video

memory. The timing for this SDRAM is made by AVDP6 independently. In the SDRAM, bit map image and palette

data that are displayed by AVDP6 are stored, and in addition, memory domain of SDRAM can be mapped directly

on the bus of CPU so that the vacant space is utilized as the work domain of CPU. The memory space of SDRAM is

controlled with general purpose SDRAM I/F.

Examples of system configuration are shown below by application.

Independent (free running) system

RAM ROM

CPU

dot clock

AVDP6

SDRAM

ITU601 8bit

YCbCr 16bit

RGB 18bit

RGB analog

When displaying bit map image stored in the video memory independently, it is possible to output sync

signal and display data that are compatible with various scan timing functions by supplying dot clock that is

suited to the display device and by writing timing parameter into the registers for internal scan timing. Since

the display data are outputted as analog and digital data, an LCD panel can be connected directly to the device

and video signal can be created by Video Encoder device.

OSD of NTSC digital images

RAM ROM

CPU

27MHz

MPEG2 ITU656

decoder

AVDP6

SDRAM

ITU656 NTSC

encoder

Video

This is an example of system configuration that uses AVDP6 to display OSD images of digital video

equipment conforming to NTSC (SDTV) such as DVD. Since AVDP6 is equipped with input / output pins for

digital images, the digital video signal can be inputted without converting it to analog signal, processed with

OSD and α blending without deteriorating the quality of images, and then outputted. When displaying bitmap

image of AVDP6 for external video with OSD, it is necessary to synchronize the external video signal with

scanning of AVDP6. At this time, OSD image can be synchronized with external video by inputting sync

signal of the external video into scan control circuit of AVDP6. (As the dot clock, use the clock that is

synchronized with external video signal.)

The digital image I/F of AVDP6 is compatible with digital I/F that conforms to CCIR-Rec601/656 (ITU656).

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