S1D15715 Epson Electronics America, Inc., S1D15715 Datasheet - Page 49

• Manufacturer Part Number: S1D15715
• Description: Liquid Crystal Display =lcd Driver
• Manufacturer: Epson Electronics America, Inc.

4
It is recommended that the operating modes and display contents be refreshed periodically.
5
<Power (V
Turn the power (LCD power (V
• The requirement
• If
t
t
It also depends on a given LCD panel, thus actual timing must be determined after experimenting on your LCD
panel.
Rev.1.0
L
H
must be specified on software from MPU.
depends on discharging capability of the drivers. See “Reference data” in the following section.
Refresh
Precautions on powering OFF
t
L
<
t
H
DD
, display failures can result.
-V
COM
SEG
V
V
V
V
V
V
V
SS
DD
0
1
2
3
4
SS
) OFF >
t
L
>
t
H
must be strictly observed.
0
-V
Power
save
SS
) system OFF) save mode off -> Then, turn the power (V
Set every command to the selected setting
V
V
SS
SS
Power OFF
Display ON/OFF command
Implement DDRAM refresh
t
H
Approximately 1V: Lower than Vth on the LCD panel
t
Refresh sequence
L
1.8V
For
EPSON
t
H
, see the “Reference data”.
S1D15715 Series Technical Manual
Since power (V
output cannot be maintained at a fixed
level.
DD
-V
SS
DD
) is turned OFF,
-V
SS
) off.
43