Microcontroller Advanced Kit -
Using the LCD Module
The LCD Module can easily be used
with an 8051 microcontroller such as the AT89C2051
included with the
microcontroller beginner kit.
The LCD Module comes with a 16 pin connector.
This can be plugged into the breadboard as shown
below.
The pins on the 16 pin connector of the LCD
Module are defined below. The table also shows how
to connect each pin to the 2051 microcontroller. To
connect the LCD Module to a standard 40 pin 8051,
use the pin names listed below to find the correct
pin number on the 8051 microcontroller. The example
programs below do not need to be modified to work
with a 40 pin 8051.
LCD Connector
Function
2051 Pin Number & Name
LCD Connector
Function
2051 Pin Number & Name
1
Data Line 6
18, P1.6
16
LCD RS
7, P3.3
2
Data Line 1
13, P1.1
15
Data Line 5
17, P1.5
3
Power - 5VDC
14
LCD Read/Write
6, P3.2
4
Not Connected
13
Data Line 0
12, P1.0
5
Display Adjust
12
Data Line 4
16, P1.4
6
Data Line 7
19, P1.7
11
LCD Enable
8, P3.4
7
Data Line 2
14, P1.2
10
Data Line 3
15, P1.3
8
Ground
9
Not Connected
The basic 2051 configuration is shown below.
Build this circuit and then you will be ready to add
the LCD Module.
After you have built a basic 2051 configuration as
shown above, you can connect the LCD Module as shown
in the table above. In addition, you need to add
the following connections.
Connect LCD Pin 3 to Vcc (5 Volts). Connect LCD Pin 8 to Ground.
Connect a 510 ohm resistor between LCD Pin 5 and
ground. Connect a 2.2k ohm resistor from LCD Pin 2 and
Vcc. Connect a 2.2k ohm resistor from LCD Pin 13 to
Vcc.
