SED1565 Datasheet, PDF (63/87 Pages) Epson Company – Direct display of RAM data through the display data RAM

SED1565 Series
<Turning the power (VDD - VSS) off : When command control is not possible.>
2) Reset (The LCD powers (VDD - VSS) are off.) → Power (VDD - VSS) OFF
• Observe tL > tH.
• When tL < tH, an irregular display may occur.
For tL, make the power (VDD - VSS) falling characteristics longer or consider any other method. tH is
determined according to the external capacity C2 (smoothing capacity of V5 to V1) and the driver’s discharging
capacity.
Reset Power Off
tL
VDD
1.8 V
RES
VDD
SEG
VDD
COM
Since the power (VDD-VSS) is
cut off, the output comes not
be fixed.
V1
V2
About 1 V: Below Vth of the LCD panel
V3
V4
V5
tH For tH, see Figure 29.
<Reference Data>
V5 voltage falling (discharge) time (tH) after the process of operation → power save → reset.
V5 voltage falling (discharge) time (tH) after the process of operation → reset.
100
VDD-VSS(V)
1.8
2.4
50
3.0
4.0
5.0
0
0.5
1.0
C2: V1 to V5 capacity (uF)
Figure 29
EPSON
8–61