27976 Parallax Inc, 27976 Datasheet - Page 2
![MODULE SRL LCD 2X16 NON-BACKLIT](/photos/7/89/78992/mfg_27976_sml.jpg)
27976
Manufacturer Part Number
27976
Description
MODULE SRL LCD 2X16 NON-BACKLIT
Manufacturer
Parallax Inc
Specifications of 27976
Display Mode
Transflective
Interface
Serial
Display Type
STN - Super-Twisted Nematic
Number Of Digits/alpha
32
Outline L X W X H
80.00mm x 36.00mm x 21.00mm
Viewing Area
61.00mm L x 15.70mm W
Backlight
Without Backlight
Display Format
16 x 2
Character Format
5 x 8 Dots
Voltage - Supply
5.0V
Operating Temperature
-20°C ~ 70°C
Character Count X Line
16 x 2
Module Size (w X H X T)
38 mm x 80 mm
Features
Serial LCD
Fluid Type
STN Positive
Voltage Rating
5 VDC
Operating Temperature Range
- 20 C to + 70 C
Backlight Type
LED Yellow-Green
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Dot Size
-
Character Size
-
Lead Free Status / Rohs Status
Lead free / RoHS Compliant
Quick Start Circuit
The Serial LCDs should be powered from an external regulated 5 V power supply. Make sure the power
supply has an adequate current rating to power the Serial LCD and the BASIC Stamp, Propeller chip, or
whichever microcontroller and other devices you are using.
CAUTION
DO NOT PROVIDE A SIGNAL TO THE 'RX' PIN BEFORE APPLYING 5 VDC TO THE '5V' PIN.
Baud Rate Setup
After connecting the Serial LCD, you will need to select the baud rate at which you are going to send it
data. You have three choices: 2400, 9600, and 19,200 baud. To set the baud rate, move the dip
switches on the back of the LCD into the correct positions according to the table next to the switches,
which is also repeated below:
As you can see from the table, there is also a fourth choice called Test. Use this Test mode to confirm
that the power and ground to the LCD are hooked up correctly before you send it any data. Move the dip
switches to the Test setting and turn on the power. The LCD display should turn on with the backlight on
(models 27977, 27979) and display the following text:
If you don’t see the text at first, try adjusting the LCD contrast by turning the pot labeled “Increase
Contrast” with a screwdriver. Turn it in the direction of the arrow to make the characters show up more
clearly. If you still don’t see the characters, go back and check your electrical connections and try again.
Once you’ve successfully completed test mode, move the dip switches to the correct positions to select
the baud rate you want to use for your application.
Copyright © Parallax Inc.
19.200
MODE
2,400
9,600
Test
SW1
OFF
OFF
ON
ON
SW2
OFF
OFF
ON
ON
Parallax Serial LCDs (#27976, #27977, #27979)
Parallax, Inc.
www.parallax.com
2.1 4/15/2010 Page 2 of 10