SSD1303Z datasheet(13/56 Pages) ETC1

13 / 56 page

SSD1303

Rev 1.7

P 13/56

May 2005

Solomon Systech

VDD

This is a voltage supply pin. It must be connected to external source.

VSS

This is a ground pin. It also acts as a reference for the logic pins and the OLED driving voltages. It must be

connected to external ground.

BGGND

This is a ground pin for analog circuits. It must be connected to external ground

VCC

This is the most positive voltage supply pin of the chip. It should be supplied externally.

VREF

This is a voltage reference pin for pre-charge voltage in driving OLED device. Voltage should be set to

match with the OLED driving voltage in current drive phase. It can either be supplied externally or by

connecting to VCC.

IREF

This is a segment current reference pin. A resistor should be connected between this pin and VSS. Set the

current at 10uA.

VCOMH

This is an input pin for the voltage output high level for COM signals. A capacitor should be connected

between this pin and VSS.

VDDB This is a power supply pin for the internal buffer of the DC-DC voltage converter. It must be

connected to VDD when the converter is used.

VSSB

This is a ground pin for the internal buffer of the DC-DC voltage converter. It must be connected to VSS

when the converter is used.

GDR

This is an output pin drives the gate of the external NMOS of the booster circuit.

RESE

This is a source current pin of the external NMOS of the booster circuit.

VBREF

This is an internal voltage reference pin for booster circuit. A stabilization capacitor, typ. 1uF, should be

connected to Vss.

This is a feedback resistor input pin for the booster circuit. It is used to adjust the booster output voltage

level, Vcc.

COM0-COM63

These are pins provided the Common switch signals to the OLED panel. They are in high impedance state

when display is OFF.

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