User Manual

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Pin 7 (D0-D7): pins that read and write data
A and K: controlling LCD backlight; K connects to GND, and A to 3.3V. Turn the backlight on
and you can see the characters displayed clear in a dim environment
LCD1602 has two operation modes: 4-bit and 8-bit. When the IOs of the MCU are insufficient,
you can choose the 4-bit mode, under which only pins D4~D7 are used. After connecting
the circuit, you can operate LCD1602 by the Raspberry Pi.
Experimental Procedures
Step 1: Build the circuit (please be sure the pins are connected correctly. Otherwise,
characters will not be displayed properly):
LCD1602
T-Extension Board
VDD
5V
VSS
GND
OV
Connect to the middle pin of potentiometer
RS
B27
R/W
GND
E
B22
D0-D3
Not connected
D4
B25
D5
B24
D6
B23
D7
B18
A
3.3V
K
GND
SunFounder