S1D15714 Datasheet, PDF (29/65 Pages) Epson Company – a single chip MLS driver

S1D15714 Series
7. COMMAND
The S1D15714 Series identifies data bus signals by a combination of A0, RD(E) and WR(R/W). Interpretation and
execution of the command are executed by the internal timing alone which is independent of the external clock. This
allows high-speed processing.
The 80 series MPU interface allows the command to be started by entering the low pulse in the RD pin during reading
and by entering the low pulse in the WR pin during writing.
The 68 series MPU interface allows a read state to occur by entering HIGH in the R/W pin, and permits a write state
to occur by entering LOW. It also allows the command to be started by entering the high pulse in the pin E. (For timing,
see the description of “10. Timing characteristics”).
Accordingly, the 68 series MPU interface is different from 80 series MPU interface in that RD(E) is “1(H)” in the case
of display data/read shown in the Command Description and Command Table. The following describes the commands,
based on the example of the 80 series MPU interface:
When the serial interface is selected, enter data sequentially starting from D7.
Command Description
(1) Display ON/OFF
This command sets the display ON/OFF.
When Display OFF is specified, the driver common to segments outputs the VC level.
E R/W
A0 RD WR D7 D6 D5 D4 D3 D2 D1 D0
0
1
0
1
0
1
0
1
1
1
0
1
Output level
Display OFF
Display ON
(2) Display Normal/Reverse
This command allows the display ON/OFF state to be reversed, without having to rewrite the contents of the display
data RAM. In this case, contents of the display data RAM are maintained.
E R/W
A0 RD WR D7 D6 D5 D4 D3 D2 D1 D0
0
1
0
1
0
1
0
0
1
1
0
1
Setting
RAM data = HIGH
LCD ON Voltage
(normal)
RAM data = LOW
LCD ON Voltage
(reverse)
(3) Display All Lighting ON/OFF
This command forces all the displays to be turned on independently of the contents of the display data RAM. In this
case, the contents of the display data RAM are maintained. Fully white display can also be made by a combination of
the Display Reverse command.
E R/W
A0 RD WR D7 D6 D5 D4 D3 D2 D1 D0
0
1
0
1
0
1
0
0
1
0
0
1
Setting
Normal display status
Display all lighting
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EPSON
Rev. 1.0