PCA9620H NXP [NXP Semiconductors], PCA9620H Datasheet - Page 12

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

NXP Semiconductors
PCA9620
Product data sheet
7.1.16 Command: temp-filter
7.2 Possible display configurations
In frame inversion mode the DC value is compensated across two frames and not within
one frame. Changing the inversion mode to frame inversion reduces the power
consumption, therefore it is useful when power consumption is a key point in the
application.
Frame inversion may not be suitable for all applications. The RMS voltage across a
segment is better defined, however since the switching frequency is reduced there is
possibility for flicker to occur.
The waveforms of
inversion mode.
Table 23.
[1]
The PCA9620 is a versatile peripheral device designed to interface between any
microprocessor or microcontroller to a wide variety of LCD segment or dot matrix displays
(see
backplanes and up to 60 segments.
The display configurations possible with the PCA9620 depend on the number of active
backplane outputs required; a selection of possible display configurations is given in
Table
Bit
7 to 1
0
Default value.
Figure
24.
Symbol
-
TFE
Temp-filter - digital temperature filter command bit description
3). It can directly drive any static or multiplexed LCD containing up to eight
All information provided in this document is subject to legal disclaimers.
Figure 22 on page 30
Figure 15 on page 23
Rev. 1 — 9 December 2010
Value
1101001
0
1
[1]
shows one example of frame inversion.
to
Universal LCD driver for low multiplex rates
Figure 21 on page 29
Description
fixed value
digital temperature filter switch
digital temperature filter disabled;
the unfiltered digital value of TD[7:0] is
immediately available for the readout and
V
page 35
digital temperature filter enabled
LCD
compensation, see
are showing line
PCA9620
Section 7.4.7 on
© NXP B.V. 2010. All rights reserved.
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