PCF8533USLASH2DASLASH2 datasheet(17/45 Pages) NXP

Il numero della parte	PCF8533U/2DA/2

Spiegazioni elettronici	Universal LCD driver for low multiplex rates

PDF	45 Pages

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Produttore elettronici	NXP [NXP Semiconductors]

Homepage	http://www.nxp.com

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PCF8533_4

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Product data sheet

Rev. 04 — 5 March 2010

17 of 45

NXP Semiconductors

PCF8533

Universal LCD driver for low multiplex rates

An additional feature allows an arbitrary selection of LCD segments to be blinked in the

static and 1:2 drive modes. This is implemented without any communication overheads by

the output bank selector which alternates the displayed data between the data in the

display RAM bank and the data in an alternative RAM bank at the blink frequency. This

mode can also be implemented by the blink-select command.

In the 1:3 and 1:4 drive modes, where no alternate RAM bank is available, groups of LCD

elements can be blinked by selectively changing the display RAM data at fixed time

intervals.

Table 7.

Blink frequencies

Blink mode

Normal operating

mode ratio

Nominal blink frequency of fclk

typical fclk = 1.536 kHz

Unit

Off

blinking off

30.5

clk

768

---------

clk

1536

------------

clk

3072

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