RA8820 查看數據表（PDF） - RAIO

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RA8820

Character/Graphic LCD-Controller Specification

RAIO 

Version 1.1

RA8802/8820

Character/Graphic LCD Controller

3. Block Diagram

COMMAND DECODER

/ REGISTER CIRCUIT

Iout

5 Bit

DAC

512KB

DISPLAY

LPF

FONT

DATA SRAM

RA

ROM

RB

PLL/OSC

XA

CIRCUIT

XB

MCU INTERFACE CIRCUIT

DISPLAY

TIMING

GENERATOR

CIRCUIT

8 Bit

ADC

LP

FRM

YD

DISPOFF

XCK

LD7

LD6

LD5

LD4

LD3

LD2

LD1

LD0

X1

X2

Y1

Y2

Vref

4. Pin Definition

4.1 MCU Interface

Pin Name I/O

Description

Bi-direction 8 bit data bus connected to MCU data bus.

DB[7..0]

I/O The high nibble DB[7..4] should be connected to GND when 4 bit data bus

mode is used.

RD#

(EN)

Active low RD# signal when 8080 MCU is used.

I

Active high EN signal when 6800 series MCU are used.

Active low WR# signal when 8080 MCU is used.

WR#

(R/W#)

The data are latched at the rising edge of the WR# signal.

I

Connected to 6800 series MCU R/W# pin when 6800 MCU is used.

The MCU data will be read from RA8802/8820 when R/W# is high and will

be written to RA8802/8820 when R/W# is low.

RS

I

Register/Data select pin.

RAiO TECHNOLOGY INC.

3/7

www.raio.com.tw

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