ra8816 RAIO Technology Inc., ra8816 Datasheet - Page 25

• Manufacturer Part Number: ra8816
• Description: 144x65 Character/graphic Lcd Driver
• Manufacturer: RAIO Technology Inc.

Preliminary Version 1.6
6. Function Description
RAiO TECHNOLOGY INC.
6-1 MPU Interface
6-1-1 Parallel Interface
The MPU interface of RA8816 supports both 8080 and 6800 series with in 4-Bit or 8-bit bus width. If
the “C86” connects to GND, then the MPU is defined as 8080 type interface. If pin “C86” connects
to VDD, then it’s defined as 6800 type interface. Refer to the Figure 6-1 and 6-2.
If the pin “BIT4” connects to GND, then the bus width of MPU interface is 8-Bit. If the pin “BIT4”
connects to VDD, then the bus width is 4-Bit. And only the DB[3..0] of data bus are available.
D0-D3(D0-D7)
8080
MPU
D0-D3(D0-D7)
6800
MPU
Figure 6-1: 8080 (4/8-Bit) MPU Interface
Figure 6-2: 6800 (4/8-Bit) MPU Interface
A1-A7
A1-A7
IORQ
VMA
RES
RES
R/W
WR
RD
EN
A0
A0
Decoder
Decoder
25/68
D/C
DB0-3(DB0-7)
RD
WR
RST
RS
DB0-3(DB0-7)
EN
R/W
RST
CS
CS
RA8816
RA8816
-
144x65 Character/Graphic LCD Driver
BIT4
BIT4
C86
C86
P/S
P/S
VDD
VDD
VDD
GND
VDD
GND
or
or
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RA8816