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PCA9620 датащи(PDF) 18 Page - NXP Semiconductors

номер детали PCA9620
подробное описание детали  Universal LCD driver for low multiplex rates
PDF  71 Pages
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производитель  NXP [NXP Semiconductors]
домашняя страница  http://www.nxp.com
Logo NXP - NXP Semiconductors

PCA9620 датащи(HTML) 18 Page - NXP Semiconductors

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PCA9620
All information provided in this document is subject to legal disclaimers.
© NXP B.V. 2010. All rights reserved.
Product data sheet
Rev. 1 — 9 December 2010
18 of 71
NXP Semiconductors
PCA9620
Universal LCD driver for low multiplex rates
7.3.3 Recommended power-down sequences
With the following sequences the PCA9620 can be set to a state of minimum power
consumption, called power-down mode.
Fig 9.
Recommended start-up sequence when using an external supplied VLCD and an
external clock signal
Wait 1 ms
START
Initialize
command
013aaa252
Write RAM
content to be
displayed and
enable the
display
STOP
Apply external
clock signal
to pin CLK;
set OSC bit
logic 1
Power-on
VDD1, VDD2,
and VLCD
at the
same time
Initiate an
OTP-refresh
Fig 10. Recommended power-down sequence for minimum power-down current when
using the internal charge pump and the internal clock signal
Stop genera-
tion of VLCD
by setting bit
CPE logic 0
START
Disable dis-
play by setting
bit E logic 0
Disable tem-
perature mea-
surement by
setting bit
TME logic 0
013aaa253
STOP



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