PCA9620H NXP [NXP Semiconductors], PCA9620H Datasheet - Page 16

• Manufacturer Part Number: PCA9620H
• Description: Universal LCD driver for low multiplex rates
• Manufacturer: NXP [NXP Semiconductors]

NXP Semiconductors
PCA9620
Product data sheet
7.3.2 Recommended start-up sequences
This chapter describes how to proceed with the initialization of the chip in different
application modes.
Fig 6.
(1) This time depends on the external capacitor on pin V
(2) RAM data may be written before or during the ramp-up of V
Recommended start-up sequence when using the internal charge pump and the
to 15 ms is expected.
When using the internal V
V
on the display.
internal clock signal
LCD
with the internal charge pump is completed, otherwise unwanted display artifacts may appear
All information provided in this document is subject to legal disclaimers.
Rev. 1 — 9 December 2010
OTP-refresh
V
same time
LCD
Wait 1 ms
command
Initiate an
Power-on
V
DD2
Initialize
START
DD1
generation, the display must not be enabled before the generation of
at the
and
Universal LCD driver for low multiplex rates
V
displayed and
desired V
charge pump
multiplication
and enable it
content to be
programmed
LCD
LCD
Write RAM
enable the
register to
display
factor for
Set VPR
value
Wait till
STOP
value
Set
. For a capacitor of 100 nF a delay of 5 ms
reaches
013aaa249
(1)
(2)
LCD
LCD
.
PCA9620
© NXP B.V. 2010. All rights reserved.
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