27976 Parallax Inc, 27976 Datasheet - Page 3

• 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

Displaying Text
Now that the LCD is set up, it’s time to start sending text to the display. To display a character of text on
the Serial LCD, simply send the ASCII code of that character to the Serial LCD over the serial port at the
correct baud rate.
When a character is received, the Serial LCD displays that character at the current cursor position and
then moves the cursor one position to the right. When you first turn on the LCD, the cursor is in the
leftmost position on the top line, as you might expect. The short bar on the bottom of the character
shows where the cursor is positioned currently.
Once you’ve sent a full line characters to the LCD, you will notice that the cursor automatically wraps
around to the leftmost position of the second line, just like the text in a book. The text will wrap like this
at the end of every line, with the end of the bottom line wrapping back around to the top line of the LCD.
The text will never “run off” the display; you’ll always see all of the characters you send.
Example code is provided below. You may download the example code files from the 27976, 27977, or
27979 product pages at www.parallax.com; just enter any of these product numbers in the “search” field
on the home page
BASIC Stamp 2 example code
You may download the example code from the 27976, 27977, or 27979 product pages at
www.parallax.com; just enter any of these product numbers in the “search” field on the home page. Try
the following code on your BASIC Stamp 2 to send a text string to the LCD display. First, set the baud
rate on your Serial LCD to 19,200. Then, load the code below into your BASIC Stamp 2 and run it.
You will see the text string show up and wrap to the second line of the display.
In all of your Serial LCD code, you should pause for 100 ms at start-up to give time for the Serial LCD to
initialize. You should also set the serial port pin on the BASIC Stamp to HIGH before the 100 ms start-up
delay, as this is the normal state of a serial port when it isn’t sending any data.
' {$STAMP BS2}
TxPin
Baud19200
For extensive code examples using the Parallax 2X16 LCD, see “Smart Sensors and Applications” which is
available for free download. Search “28089” from www.parallax.com.
Copyright © Parallax Inc.
HIGH TxPin
PAUSE 100
SEROUT TxPin, Baud19200, ["Hello, this text will wrap."]
CON
CON
0
32
Parallax Serial LCDs (#27976, #27977, #27979)
' Set pin high to be a serial port
' Pause for Serial LCD to initialize
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