ST7565V Sitronix Technology, ST7565V Datasheet - Page 40

• Manufacturer Part Number: ST7565V
• Description: 65 x 132 Dot Matrix LCD Controller/Driver
• Manufacturer: Sitronix Technology

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ST7565V
(3) When the V/F circuit alone is used
* 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
• Next turn all the power supplies ON and determine C1.
Ver 1.5b
the liquid crystal drive voltages (V
voltage.
C1 and C2 are determined by the size of
the LCD being driven
Item
C1
C2
V
V
V
DD
DD
SS
Set value
1.0 to 4.7
0.1 to 4.7
External
power
supply
C2
C2
C2
C2
C2
units
uF
uF
1
to V
V
V
CAP3-
CAP1+
CAP1-
CAP2+
CAP2-
V
V
V
V1
V2
V3
V4
V5
SS2
OUT
5
R
DD
5
). Note that all C2 capacitors must have the same capacitance value.
IRS
M/S
CAP4-
CAP5-
40/72
(4) When the built-in power is not used
V
DD
External power supply
V
SS
V
V
CAP3-
CAP1+
CAP1-
CAP2+
CAP2-
V
V
V
V1
V2
V3
V4
V5
SS2
OUT
5
R
DD
IRS
M/S
V
DD
CAP4-
CAP5-
2009/09/14