S1D15E06 Series
5.3 System Bus Connection Pin
Number of
pins
Pin name
I/O
Description
D7 to D0
I/O
Connects to the 8-bit or 16-bit MPU data bus via the 8-bit
bi-directional data bus.
8
(SI)
(SCL)
When the serial interface is selected (P/S = LOW), D7 serves as the
serial data input (SI) and D6 serves as the serial clock input (SCL),
In this case, D0 through D5 go to a high impedance state. When the
Chip select is inactive, D0 through D7 go to a high impedance state.
A0
I
Normally, the least significant bit MPU address bus is connected
to distinguish between data and command.
1
A0 = HIGH : indicates that D0 to D7 are display data or command parameters.
A0 = LOW : indicates that D0 to D7 are control commands.
RES
I
I
I
When the RES is LOW, initialization is achieved.
Resetting operation is done on the level of the RES signal.
1
2
1
CS1
CS2
A chip select signal. When CS1 = LOW and CS2 = HIGH, signals
are active, and data/command input/output are enabled.
RD
(E)
• When the 80 series MPU is connected.
A pin for connection of the RD signal of the 80 series MPU.
When this signal is LOW, the data bus of the S1D15E06 series
is in the output state.
• When the 68 series MPU is connected.
Serves as a 68 series MPU enable clock input pin.
WR
(R/W)
I
• When the 80 series MPU is connected.
A pin for connection of the WR signal of the 80 series MPU.
Signals on the data bus are latched at the leading edge of the
WR signal.
1
• Serves as a read/write control signal input pin when the 68 series
MPU is connected.
R/W = HIGH : Read
R/W = LOW : Write
C86
P/S
I
I
A MPU interface switching pin.
C86 = HIGH : 68 series MPU interface
C86 = LOW : 80 series MPU interface
1
1
Parallel data input/serial data input select pin
P/S = HIGH : Parallel data input
P/S = LOW : Serial data input
The following Table shows the summary:
P/S Data/Command
Data
Read/Write Serial clock
HIGH
LOW
A0
A0
D0 to D7
SI (D7)
RD, WR
Write only
SCL (D6)
When P/S = LOW, D0 to D5 are high impedance.
D0 to D5 can be HIGH, LOW or open.
RD(E) and WR(R/W) are locked to HIGH or LOW.
The serial data input does not allow the RAM display data to be read.
8
EPSON
Rev. 2.1
EPSON [ EPSON COMPANY ]
