YGV627

3

s

s

s

s BLOCK DIAGRAM

Drawing

command

CPU

Memory

control

Sync.

control

PLL

Display

control

Screen

synthesis

Digital video

input

Analog

RGB

YGV627

OSD screen

CPU

Interface

SDRAM

16Mbit

16

16

TFT

Panel

Digital video output

(Also used as digital video

input pin)

DAC

YGV627 is connected to the external memory bus of CPU as an external I/O device. As a video memory, SDRAM of up

to 64M bits can be connected to local memory bus of YGV627 to send bitmap image data stored in the video memory into

monitor as RGB signal in accordance with display scan timing.

YGV627 stores image data from CPU to the video memory by accessing video memory directly through CPU interface

or by accessing the video memory using internal drawing command that transfers the data by block.

YGV627 has a function that synthesizes external images with bitmap image of YGV627 on the screen by synchronizing

the scan timing of YGV627 with display timing of external video signals.