PCF85162 datasheet(10/46 Pages) NXP

Part #	PCF85162

Description	Universal LCD driver for low multiplex rates

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Manufacturer	NXP [NXP Semiconductors]

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PCF85162

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Product data sheet

Rev. 3 — 16 June 2011

10 of 46

NXP Semiconductors

PCF85162

Universal 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. The

backplane (BPn) and segment (Sn) 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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