PCA8523Q1 datasheet(11/54 Pages) NXP

Part #	PCA8523Q1

Description	LCD driver for low multiplex rates

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Manufacturer	NXP [NXP Semiconductors]

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PCA85232

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Product data sheet

Rev. 1 — 8 December 2010

11 of 54

NXP Semiconductors

PCA85232

LCD driver for low multiplex rates

7.4 LCD drive mode waveforms

7.4.1 Static drive mode

The static LCD drive mode is used when a single backplane is provided in the LCD.

Backplane and segment drive waveforms for this mode are shown in Figure 6.

Vstate1(t) = VSn(t) − VBP0(t).

Von(RMS) = VLCD.

Vstate2(t) = V(Sn+1)(t) − VBP0(t).

Voff(RMS) = 0 V.

Fig 6.

Static drive mode waveforms

013aaa207

VSS

VLCD

VSS

VLCD

VSS

VLCD

−VLCD

VLCD

state 1

0 V

BP0

Sn

Sn+1

state 2

0 V

(a) Waveforms at driver.

(b) Resultant waveforms

at LCD segment.

LCD segments

state 1

(on)

state 2

(off)

Tfr

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