SSD1850 datasheet(16/56 Pages) ETC

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SSD1850/51 Series

Rev 1.2

01/2003

SOLOMON

VSS

Ground.

VCI

Reference voltage input for internal DC-DC converter. The voltage of generated VCC equals to the

multiple factor (2X, 3X, 4X, 5X or 6X) times VCI with respect to VSS.

Note: voltage at this input pin must be larger than or equal to VDD. 6x is available for SSD1851 only.

VCC

This is the most positive voltage supply pin of the chip. It can be supplied externally or generated by the

internal DC-DC converter.

When using internal DC-DC converter as generator, voltage at this pin is for internal reference only. It

CANNOT be used for driving external circuitries.

C1P, C2P, C3P, C4P, C5P, C1N and C2N

When internal DC-DC voltage converter is used, external capacitor(s) is/are connected to these pins.

(Reference to application Circuit on P.42)

VL6

This pin is the most positive LCD driving voltage. It can be supplied externally or generated by the internal

regulator.

This pin is an input of the internal voltage regulator. When the internal resistors network for the voltage

regulator is disabled (INTRS is pulled low), external resistors should be connected between VSS and VR,

and VR and VL6, respectively (Please refer to application circuit on P.43).

VEXT

This pin is an input to provide an external voltage reference for the internal voltage regulator when REF

pin is pulled L.

VL5, VL4, VL3 and VL2

These are LCD driving voltages. They can be supplied externally or generated by the internal bias divider.

They have the following relationship:

VL6 > VL5 > VL4 > VL3 > VL2 > VSS

1:a bias

VL5

(a-1)/a*VL6

VL4

(a-2)/a*VL6

VL3

2/a*VL6

VL2

1/a*VL6

For SSD1851, “a” equals to 10 at POR.

For SSD1850, “a” equals to 9 at POR.

COM0 - COM79

These pins provide the row driving signal COM0 - COM79 to the LCD panel.

ICONS

This pin is the special icon line COM signal output.

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