ST7565S ETC-unknow, ST7565S Datasheet - Page 40
![no-image](/images/no-image-200.jpg)
ST7565S
Manufacturer Part Number
ST7565S
Description
65 X 132 Dot Matrix Lcd Controller/driver
Manufacturer
ETC-unknow
Datasheet
1.ST7565S.pdf
(73 pages)
- Current page: 40 of 73
- Download datasheet (908Kb)
ST7565S
5. When the built-in power circuit is used to drive a liquid
crystal panel heavily loaded with AC or DC, it is
recommended to connect an external resistor to stabilize
potentials of V
Reference set value R4: 100Kè ~ 1Mè It is recommended
to set an optimum resistance value R4 taking the liquid
* 1. Because the VR terminal input impedance is high, use short leads and shielded lines.
* 2. C1 and C2 are determined by the size of the LCD being driven. Select a value that will stabilize the liquid crystal drive
Example of the Process by which to Determine the Settings:
• Turn the voltage regulator circuit and voltage follower circuit ON and supply a voltage to VOUT from the outside.
• Determine C2 by displaying an LCD pattern with a heavy load (such as horizontal stripes) and selecting a C2 that stabilizes the
• Next turn all the power supplies ON and determine C1.
Ver 0.3c
liquid crystal drive voltages (V
ÖÅ
voltage.
åÇ
1
, V
é
é
é
åÇ
××
××
ææ
2
, V
åÇ
3
åÇ
and V
Øøôÿ
ø
ÿ
é
éÄ
éÅ
éÆ
éÇ
éÈ
×׿
4
ÖÅ
ÖÅ
ÖÅ
ÖÅ
ÖÅ
1
é
which are output from the
Ã
to V
5
). Note that all C2 capacitors must have the same capacitance value.
é
é
ÖÔãÆÀ
ÖÔãľ
ÖÔãÄÀ
ÖÔãž
ÖÔãÅÀ
é
é
é
éÄ
éÅ
éÆ
éÇ
éÈ
ææÅ
âèç
È
å
××
Üåæ
àÂæ
Figure 15
ÖÔãÇÀ
ÖÔãÈÀ
40/72
built-in voltage follower.
Examples of shared reference settings When V
between –8 and 12 V
crystal display and the drive waveform.
é
××
Øøôÿ³
ø³ÿ
C1 and C2 are determined by the size of
the LCD being driven
Item
c1
c2
é
Set value
1.0 to 4.7
0.1 to 4.7
ææ
é
é
ÖÔãÆÀ
ÖÔãľ
ÖÔãÄÀ
ÖÔãž
ÖÔãÅÀ
é
é
é
éÄ
éÅ
éÆ
éÇ
éÈ
ææÅ
âèç
È
å
××
Üåæ
units
uF
uF
àÂæ
é
××
ÖÔãÇÀ
ÖÔãÈÀ
2002/07/22
5
can vary
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