User Manual

P A G E 22
E a s y P I C v 8 M a n u a l
C O N N E C T I V I T Y
1x20 graphical display connector
The EasyPIC v8 development board is equipped with the 1x20 graphical display
connector [1], off ering support for GLCDs with the resolution of 128x64 pixels, driven
by the KS108 or compatible display controller.
Graphical Liquid Crystal Displays (GLCDs) [2] can be used to display monochromatic
graphical content such as text, images, etc. Besides data lines, 1x20 GLCD connector
also contains command lines, necessary power supply rails (GND, +5V for the backlight
and for the display module), backlight PWM control, and contrast control voltage.
GLCDs usually come with a touch-sensitive panel, which allows them to be used as
input devices. The EasyPIC v8 development board provides support for the resistive
touch panel over two separate connectors: one 1x4-pin header and one 4-pin fl at-
cable connector (FFC) labeled as J4 [3], typically used for GLCDs. This connector is
perfectly aligned with the GLCD modules which are available for purchase from the
offi cial Mikroe store. For more information about the GLCD displays, please visit our
web page: www.mikroe.com
Two DIP switches (SW6 and SW2) located in the BOARD SETUP section of the
development board are used to set up the confi gurable options for both the GLCD
backlight and touch panel control. Two poles of the SW6 DIP switch (4), grouped
under the GLCD label, are used to control the backlight options of the GLCD:
SW6.1:
ON (up): GLCD backlight is ON
OFF (down): GLCD backlight is OFF
SW6.2:
ON (up): PWM signal at the RC2 pin controls the GLCD backlight brightness
OFF (down): Backlight brightness amount is fi xed and can't be controlled by the MCU
A four-pole DIP switch (8) labeled as SW2 allows to connect the pins RA0, RA1, RA4,
and RC0 to the touch panel control circuit:
SW2:
ON (up): A specifi c touch panel control is connected to the respective MCU pin
OFF (down): A specifi c touch panel control is disconnected from the respective MCU pin
In order to use backlight PWM dimming, both SW6.1 and SW6.2 switches must
be enabled at the same time.
N O T E
If you want to upgrade your GLCD application with TFT display, EasyTFT board (5)
is a perfect choice. It features connector compatible with 1x20 graphical display
connector (1) on EasyPIC v8 development board, and a touch panel connector.
The EasyTFT board contains 2.83" TFT color display MI0283QT-9A with 320x240 pixel
resolution, which is driven by ILI9341 display controller, capable of showing advanced
graphical content. Each pixel can display 262K diff erent colors. TFT display is covered
with a resistive touch panel which can be used as input device, supported with 1x4 pin
header [6] on EasyPIC v8 development board.
The board is primarily designed to be used as a display board on Mikroe Easy
development boards. After testing and building the fi nal program, this board can also
be used in your fi nal device. The board also contains mounting holes (7) for easier
integration into your designs.
A four-pole DIP switch (8) labeled as SW2 located in the BOARD SETUP section of the
development board is used to set up the confi gurable options for touch panel control.
It allows to connect the pins RA0, RA1, RA4, and RC0 to the touch panel control circuit:
SW2:
ON (up): A specifi c touch panel control is connected to the respective MCU pin
OFF (down): A specifi c touch panel control is disconnected from the respective MCU pin
The EasyTFT board and LCD use the same pins, thus are unable to operate if
simultaneously plugged in.