Specifications

EPSON 7–33
SED1234/35 Series
SED1234/35
Series
MPU INTERFACE (REFERENCE EXAMPLES)
The SED1234, 1235 can be connected to the 80 series MPU and 68 series MPU. When an serial interface is used, the
SED1234, 1235 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
SED1234/35
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
SED1234/35
VMA
E
V CC
RES
GND
MPU
RESET
V
DD
A0
CS
SI
RES
V
SS
IF
P/S
SED1234/35
SCL
Port4
Port3
Port1
Port2
V
or GND
SS