ST7565R datasheet(39/72 Pages) SITRONIX

39 / 72 page

ST7565R

Ver 1.7c

39/72

2009/09/14

(3) When the V/F circuit alone is used

(4) When the built-in power is not used

VSS

VOUT

CAP3P

CAP1N

CAP1P

CAP2N

CAP2P

IRS

M/S

VDD

External power supply

CAP4P

CAP5P

VDD2 or VSS

VSS

VDD2 or VSS

VOUT

CAP3P

CAP1N

CAP1P

CAP2N

CAP2P

IRS

M/S

VDD

VDD2 or VSS

CAP4P

CAP5P

VDD2 or VSS

VSS

External

power

supply

VDD2 or VSS

VSS

Item

Set value

unit

1 ~ 2.2

0.1 ~ 1

Note:

C1 ~ C2 are determined by the size of the LCD being driven.

The recommended panel size is smaller than 1.8”.

If the panel loading is too heavy and cause poor display quality, adding V0 capacitor can improve display quality.

* 1. Because the VR terminal input impedance is high, use short leads and shielded lines.

* 2. C1 ~ C2 are determined by the LCD loading (size). Select a suitable value that matches the module.

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 the capacitor that

stabilizes the liquid crystal drive voltages (V0 to V4). Note that all C2 capacitors must have the same capacitance value.

• Next, remove external VOUT and turn all internal power supplies ON and then select C1.

ST7565R Datasheet(PDF) 39 Page - Sitronix Technology Co., Ltd.

ST7565R Datasheet(HTML) 39 Page - Sitronix Technology Co., Ltd.

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