SED1565 Datasheet, PDF (62/87 Pages) Epson Company – Direct display of RAM data through the display data RAM

SED1565 Series
Refresh
It is recommended to turn on the refresh sequence regularly at a specified interval.
Refresh sequence
Reset command or NOP command
Set all commands to the ready state
Refreshing of DRAM
Precautions on Turning off the power
• In case of SED1565DBB, SED1566DBB, SED1567DBB, SED1568DBB and SED1569DBB,
Observe Paragraph 1) as the basic rule.
<Turning the power (VDD - VSS) off>
1) Power Save (The LCD powers (VDD - V5) are off.) → Reset input → Power (VDD - VSS) OFF
• Observe tL > tH.
• When tL < tH, an irregular display may occur.
Set tL on the MPU according to the software. tH is determined according to the external capacity C2 (smoothing
capacity of V5 ~ V1) and the driver’s discharging capacity.
Power
save Reset Power Off
VDD
RES
tL
1.8 V
VDD
SEG
VDD
COM
Since the power (VDD-VSS) is
cut off, the output comes not
to be fixed.
V1
V2
About 1 V: Below Vth of the LCD panel
V3
V4
V5
tH For tH, see Figure 29.
8–60
EPSON