User manual

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Chapter17 1602LCD
What’s 1602LCD?
Nowadays 1602LCD is application of very wide range. The initial 1602 LCD used HD44780
controller. But now various manufacturers basically adopt compatible IC with their 1602 module.
Their characteristics are basically the same.
1602LCD
Display capacity: 16x2 characters;
Chip operating voltage: 4.5V~5.5V;
Operating current: 2.0mA(5.0V);
Best operating voltage: 5.0V;
Character size: 2.95x4.35( WxH ) mm.
Interface pin definition
number
symbol
states
number
symbol
states
1
VSS
GND
9
D2
Date I/O
2
VDD
VCC
10
D3
Date I/O
3
VL
VO
11
D4
Date I/O
4
RS
(V/L)
12
D5
Date I/O
5
R/W
Read/write(H/L)
13
D6
Date I/O
6
E
enable
14
D7
Date I/O
7
D0
Date I/O
15
BLA
Backlight
anode
8
D1
Date I/O
16
BLK
Backlight
cathode
1. Two sets of power supply, a set of modules, the other one is the power of the backlight,
generally using the 5V power supply.