RA8835AP3N Просмотр технического описания (PDF) - RAIO

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RA8835AP3N

Dot Matrix LCD Controller

RAIO 

Preliminary Version 1.0

RA8835A

Dot Matrix LCD Controller

1. Overview

The RA8835A is a controller IC that can display text and graphics on LCD panel. It can display layered text and

graphics, scroll the display in any direction and partition the display into multiple screens. It also stores text,

character codes and bitmapped graphics data in external frame buffer memory. Display controller functions

include transferring data from the controlling microprocessor to the buffer memory, reading memory data,

converting data to display pixels and generating timing signals for the buffer memory, LCD panel.

The RA8835A has an internal character generator with 160, 5 X 7 pixel characters in internal mask ROM. The

character generators support up to 64, 8 X 16 pixel characters in external character generator RAM and up to

256, 8 X 16 pixel characters in external character generator ROM.

2. Features

‹ Text, graphics and combined text/graphics

display modes

‹ Three overlapping screens in graphics mode

‹ Up to 640 X 256 pixel LCD panel display

resolution

‹ Programmable cursor control

‹ Smooth horizontal and vertical scrolling of all or

part of the display

‹ 1/2-duty to 1/256-duty LCD drive

‹ Up to 640 X 256 pixel LCD panel display

resolution memory

‹ 160, 5 X 7 pixel characters in internal mask-

programmed character generator ROM

‹ Up to 64, 8 X 16 pixel characters in external

character generator RAM

‹ Up to 256, 8 X 16 pixel characters in external

character generator ROM

‹ 6800 and 8080 family microprocessor interfaces

‹ Low power consumption—3.5 mA operating

current (VDD = 3.5V), 0.05 μA standby current

‹ Package:

RA8835AP3N: QFP-60 pin (Lead Free)

RA8835AP4N: TQFP-60 pin (Lead Free)

‹ Power: 2.7 to 5.5 V

3. Block Diagram

V A[15:0], VD [7:0],

VCE, VRD, VWR

TEST

256B yte

CGROM

R eg isters

B lo ck

MCU

I/F

D isp lay R A M

I/F

C ursor

C o n tro ller

X ’tal

OSC

S ystem

C o n fig u re

D ata

L a tc h

T im in g

G enerator

D [7:0], C S, R D , W R

A0, RES, SEL1, SEL2

XD XG

Y D IS , L P , W F , X S C L ,

YD , YSC L, XD [3:0]

RAiO TECHNOLOGY INC.

2/6

www.raio.com.tw

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