RA8806 Datasheet, PDF (26/174 Pages) RAIO Technology Inc. – Two Layers Character/Graphic LCD Controller Specification

Preliminary Version 1.0
RA8806
Two Layers Character/Graphic LCD Controller
6. Function Description
6-1 MPU Interface
6-1-1 MPU Type
The RA8806 support 8080 or 6800 compatible MPU interface. When the pin “MI” is pull low then the
MPU interface is set to 8080 compatible. If “MI” pulls high then the MPU interface is defined as 6800
compatible. And the pin “DB” is used to select the 8080 MPU data bus is 4-bits or 8-bits. When “DB”
is pulled low, then the data bus for data transition is 4-bits. If pin “DB” pull high, the data transition is
8-bits. The option of 4-bits or 8-bits data bus is for both 8080 and 6800 MPU. Of course, if used 4-
bits interface then the 8080 MPU has to take double time to communicate with RA8806.
8080
MPU
A0
A1 -A7
IORQ
Decoder
D0-D3(D0 -D7)
RD
WR
RES
RA8806
RS
ZCS1
CS2
MI
DATA0-3(DATA0-7)
ZRD
ZWR
ZRST
Figure 6-1 : 8080 (4/8-bits) MPU Interface
6800
MPU
A0
A1 -A7
VMA
Decoder
D0-3(D0-D7)
EN
R/W
RES
RA8806
VDD
RS
ZCS1
CS2
MI
DATA0-3(DATA0-7)
EN
ZRW
ZRST
Figure 6-2 : 6800 (4/8-bits) MPU Interface
RAiO TECHNOLOGY INC.
26/174
www.raio.com.tw