Jaicar QP5522 User Manual
Australia New Zealand
www.jaycar.com.au www.jaycar.co.nz
techstore@jaycar.com.au techstore@jaycar.co.nz
1800 022 888 0800 452 922
Page 1 of
1
QP5522 20x4 LCD
20x4 character LCD
Dimensions
The overall size of the module is 98x60mm. it has 4x 3mm diameter mounting holes
2.5mm from each edge (so there is 1mm gap from hole to edge) and the screen
protrudes out 10mm from the topside of the PCB.
Pinout
The pins on this module is labelled.
Pin
Description
VSS
Ground
VDD
5V supply
V0
Contrast
RS
Register select
RW
Read / Write
E
Enable
D0 – D7
Parallel data ports
A
Backlight Anode
K
Backlight Cathode
Specifications
Backlight LED forward voltage is 2.5V but it is in series with a 51-ohm resistor so it is
safe to connect directly to 5v.
Programming
This module uses the same HD44780U LCD controller as many of the 16x2 displays.
In all circumstances, it is possible to change the existing 16x2 code to initialise and work
in 20x4 memory space. This includes when using the arduino “LiquidCrystal.ino”
example or using the XC3706 port expander module.
Loading...