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PCF8533U/2DA/2 데이터시트(PDF) 17 Page - NXP Semiconductors

부품명 PCF8533U/2DA/2
상세설명  Universal LCD driver for low multiplex rates
PDF  45 Pages
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제조업체  NXP [NXP Semiconductors]
홈페이지  http://www.nxp.com
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PCF8533_4
All information provided in this document is subject to legal disclaimers.
© NXP B.V. 2010. All rights reserved.
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
Hz
12
Hz
21
Hz
30.5
Hz
f
clk
768
---------
f
clk
1536
------------
f
clk
3072
------------



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