RA8816
Preliminary Version 1.6
144x65 Character/Graphic LCD Driver
6. Function Description
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.
8080
MPU
RA8816
VDD
A0
A1-A7
IORQ
D/C
CS
P/S
Decoder
C86
D0-D3(D0-D7)
DB0-3(DB0-7)
RD
WR
RD
VDD
or
GND
WR
RST
BIT4
RES
Figure 6-1: 8080 (4/8-Bit) MPU Interface
6800
MPU
RA8816
VDD
A0
A1-A7
VMA
RS
CS
P/S
Decoder
C86
D0-D3(D0-D7)
DB0-3(DB0-7)
EN
R/W
RES
EN
VDD
or
GND
R/W
RST
BIT4
Figure 6-2: 6800 (4/8-Bit) MPU Interface
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RAIO [ RAIO TECHNOLOGY INC. ]
