RA8815 查看數據表（PDF） - RAIO

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RA8815

128x33 Character/Graphic LCD Driver Specification

RAIO 

Preliminary Version 2.1

RA8815

128x33 Character/Graphic LCD Driver

4. Block Diagram

The RA8815 is consist of Display RAM, 256Kbyte Font ROM, Command Registers, LCD Controller, LCD

Driver, Voltage Booster, Voltage Regulator, MPU Interface and Key-Scan circuit.

DB[0:7]

RD(EN)

WR(R/W)

CS

D/C(RS)

C86

BIT4

P/S

KST[3..0]

KIN[4..0]

INT

IO[7..0]

EL_CHRG

EL_DCHG

RA, RB

CLK_SEL

EXT_CLK

RST

TEST[2..0]

FG

S[1:0]

MPU

I/F

Block

528bytes

Display RAM + Buffer

256bytes

CGRAM

256Kx8 Font ROM

LCDC Control Block

Key Scan

Control

Block

& INT

Register

Block

GPIO

Cursor Scroll

Scan

Control Control Control

Driver I/F

RC

Oscillator

Test &

Power

Circuit

Voltage

Booster

Voltage

Regulator

Voltage

Follower

128

Segment

Drivers

33

Common

Drivers

VREG

VREF

C[2:1]P C[2:1]M V0~V4 VLCD

SEG0~SEG127 COM0~COM31 COMS_A[1:0]

COMS_B[1:0]

5. Pin Definition

5-1 MPU Interface

Pin Name

I/O

Description

DB[7..0]

Data Bus

When the MPU use parallel mode and 8-bit then all of the DB[7:0] are

DB0: SCK

valid. When use 4-bit then only DB[4:0] are valid, and DB[7:4] have to

DB1: SDA/SDO I/O keep floating.

DB2: RS/SDI

DB3: CS

DB[7:6]: SMOD

When P/ S is “0”, then the interface between MPU and RA8815 is Serial

Mode. The pins DB[7:6](SMOD[1:0]) are used to select which serial mode:

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