ST7565R datasheet(19/72 Pages) SITRONIX

19 / 72 page

ST7565R

Ver 1.7c

19/72

2009/09/14

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Power Supply Pins

Pin Name

I/O

Function

No. of Pins

VDD

Power

Supply

Power supply

VDD2

Power

Supply

Power supply

VSS

Power

Supply

Ground

VRS

Power

Supply

This is the internal-output VREG power supply for the LCD power supply voltage

regulator.

V0, V1,

V2, V3,

V4,Vss

Power

Supply

This is a multi-level power supply for the liquid crystal drive. The voltage Supply applied is

determined by the liquid crystal cell, and is changed through the use of a resistive voltage

divided or through changing the impedance using an op. amp. Voltage levels are

determined based on Vss, and must maintain the relative magnitudes shown below.

V0 ≧V1 ≧V2 ≧V3 ≧V4 ≧Vss

When the power supply turns ON, the internal power supply circuits produce the V1 to V4

voltages shown below. The voltage settings are selected using the LCD bias set

command.

1/65 DUTY

1/49 DUTY

1/33 DUTY

1/55 DUTY

1/53 DUTY

8/9*V0,6/7*V0

7/9*V0,5/7*V0

2/9*V0,2/7*V0

1/9*V0,1/7*V0

7/8*V0,5/6*V0

6/8*V0,4/6*V0

2/8*V0,2/6*V0

1/8*V0,1/6*V0

5/6*V0,4/5*V0

4/6*V0,3/5*V0

2/6*V0,2/5*V0

1/6*V0,1/5*V0

7/8*V0,5/6*V0

6/8*V0,4/6*V0

2/8*V0,2/6*V0

1/8*V0,1/6*V0

7/8*V0,5/6*V0

6/8*V0,4/6*V0

2/8*V0,2/6*V0

1/8*V0,1/6*V0

LCD Power Supply Pins

Pin Name

I/O

Function

No. of Pins

CAP1P

DC/DC voltage converter. Connect a capacitor between this terminal and the CAP1N

terminal.

CAP1N

DC/DC voltage converter. Connect a capacitor between this terminal and the CAP1P

terminal.

CAP2P

DC/DC voltage converter. Connect a capacitor between this terminal and the CAP2N

terminal.

CAP2N

DC/DC voltage converter. Connect a capacitor between this terminal and the CAP2P

terminal.

CAP3P

DC/DC voltage converter. Connect a capacitor between this terminal and the CAP1N

terminal.

CAP4P

DC/DC voltage converter. Connect a capacitor between this terminal and the CAP2N

terminal.

CAP5P

DC/DC voltage converter. Connect a capacitor between this terminal and the CAP1N

terminal.

VOUT

DC/DC voltage converter. Connect a capacitor between this terminal and VSS or VDD

terminal.

Output voltage regulator terminal. Provides the voltage between VSS and V0 through a

resistive voltage divider.

IRS = “L” : the V0 voltage regulator internal resistors are not used.

IRS = “H” : the V0 voltage regulator internal resistors are used.

ST7565R Datasheet(PDF) 19 Page - Sitronix Technology Co., Ltd.

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