Specifications

8–58 EPSON
SED1240 Series
MPU INTERFACE CONNECTION EXAMPLES (FOR REFERENCE)
The SED1240 series can be connected to the 80 series MPU or 68 series MPU. Furthermore, it can be operated with less
signal lines if the serial interface is used.
When an MPU bus, port, etc. are put into high-impedance for a certain period by RESET, input RESET into this machine
after the input to the SED1240 series becomes definitive.
80 Series MPU
68 Series MPU
Serial Interface
V CC
GND
MPU
A0
Decoder
RESET
A1 to A7
RES
WR
D0 to D7
IORQ
RD
A0
V
SS
V DD
V DD
V SS
C86
IF
SED1240 Series
P/S
CS
RES
WR
D0 to D7
V CC
GND
MPU
A0
Decoder
A1 to A15
RES
E
VMA
R/W
D0 to D7
A0
V
SS
V DD
V DD
V SS
C86
IF
SED1240 Series
P/S
CS
RES
E
D0 to D7
V CC
GND
MPU
A0
Decoder
A1 to A7
RES
Port 2
Port 1
A0
V
SS
V DD
V DD
V SS
C86
IF
SED1240 Series
P/S
CS
RES
SCL
S1
V DD or V SS
RESET
RESET