Specifications

SED1220
EPSON 4–37
SED1220
MPU INTERFACE (REFERENCE EXAMPLES)
The SED1220 Series can be connected to the 80 series MPU and 68 series MPU. When an serial interface is used, the
SED1220 Series can be operated by less signal lines.
80 Series MPU
68 Series MPU
Serial Interface
V CC
A0
A1 to A7
D0 to D7
WR
RES
GND
MPU
Decoder
RESET
V
DD
A0
CS
D0 to D7
RES
V
SS
IF
P/S
SED1220
IORQ
WR
V CC
A0
A1 to A7
D0 to D7
E
RES
GND
MPU
Decoder
RESET
V
DD
A0
CS
D0 to D7
RES
V
SS
IF
P/S
SED1220
VMA
E
V CC
RES
GND
MPU
RESET
V
DD
A0
CS
SI
RES
V
SS
IF
P/S
SED1220
SCL
Port4
Port3
Port1
Port2
V
or GND
SS