NXP Semiconductors OM6290, User Manual, Page: 8 / 30

NXP Semiconductors
UM10300
User Manual OM6290
UM10300_1 © NXP B.V. 2008. All rights reserved.
User manual Rev. 1.0— 8 August 2008 8 of 30
LCD1 shows three lines of text, with in the right bottom corner the version number. Upon
pressing any of the switches SW1, SW2 or SW3 the backlight of LCD3 turns on.
LCD1.
Power on: The NXP logo is displayed. Starting from v1.1, the following text is displayed
over three lines,:
“NXP founded by Philips”
“For the latest updates”
“visit www.nxp.com”
When pressing SW1 the displayed pattern changes to the NXP logo and subsequent
operation of SW1 results in alternating between the NXP logo, displaying the type
number of the driver (PCF8531) and displaying a face.
LCD2.
At power on the message “ * welcome * ” enters the upper line, shifting from right to left.
This shows the ‘display shift’ feature. After that the message “Please press SW1, 2 or 3”
appears. When SW2 is pressed, the display shows “NXP Insightful”. Pressing once more
results in “NXP Inventive”. Consecutive pressing of SW2 results in cycling through texts
“NXP Engaging”, “NXP Excellence”, “USE SW3 FOR BACKLIGHT” and
“NXP PCF2119s”. Hereafter the cycle starts again.
When the message “USE SW3 FOR BACKLIGHT” is displayed, SW3 does not control
what is being displayed on LCD3, but instead changes the backlight colour and/or
intensity when pressed. Also note that only when this message is displayed, a cursor is
seen blinking on the right of the message. This demonstrates the feature ‘cursor blink’ of
the PCF2119.
LCD3.
Power on: The display is blank, then after a few seconds the counter read “000”.
Pressing SW1 – SW3 increments the count. Pressing SW3 once results in the text “CH”
being displayed. Operating SW3 a 2
nd
time results in all segments being lit up. When now
SW3 is pressed a 3
rd
time, it restarts the cycle with a blank display again.
3. The LCD Drivers
The board contains three different types of LCD drivers. This chapter describes the used
drivers on the board. The key values of NXP LCD drivers are listed below.
ƒ Segment drivers:
•
High segment count, leading in number of segments supported per
single device; 60 x 4, 80 x 4, 160 x 4;
•
AEC-Q100 automotive qualification.
ƒ Character drivers:
•
Separate icon row for versatile usage.
ƒ Graphic drivers (dot matrix):