ra8802 RAIO Technology Inc., ra8802 Datasheet - Page 19

• Manufacturer Part Number: ra8802
• Description: Character/graphic Lcd Controller
• Manufacturer: RAIO Technology Inc.

Version 1.3
6. Function Description
RAiO
6.1 MCU Interface
6.2 Command/Decoder register circuit
TECHNOLOGY INC.
The RA8802/8820’s MCU interface support Intel (8080) or Motorola (6800) 4/8 bits data bus. Users could
use SYS_MI to control. Non-Pull when 6800 MCU is used. Pull low when 8080 MCU series are used.
This circuit store and implement the command from MCU Interface. The Register [00h, 08h, 10h] treats
the whole chip and cursor setup. The Register [20h, 30h, 40h, 50h] can setup the work range maximum
Figure 6-1：8080 (4/8-bit) MCU Interface Diagram
Figure 6-2：6800 (4/8-bit) MCU Interface Diagram
8080
MCU
D0-D3(D0-D7)
6800
MCU
D0-D3(D0-D7)
A1-A7
A1-A7
IORQ
VMA
RES
RES
R/W
WR
RD
EN
A0
A0
Decoder
Decoder
19/19
RS
CS1
CS2
D0-D3 (D0-D7)
RD
WR
RST
RS
CS1
CS2
D0-D3 (D0-D7)
EN
R/W
RST
RA8802
RA8802
Character/Graphic LCD Controller
SYS_MI
SYS_MI
VDD
RA8802/8820
www.raio.com.tw