Difference between revisions of "Serial enabled LCD backpack"

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== Communication ==
 
== Communication ==
 
Communication with SerLCD requires 5V TTL serial at a default baud rate of 9600bps with 8 bits of data, 1 start bit, 1 stop bit, and no parity (8-N-1). You can adjust the baud to any standard rate between 2400 and 38400bps. The power, ground and RX pins are all broken out to a 3.5mm pitch screw terminal.
 
Communication with SerLCD requires 5V TTL serial at a default baud rate of 9600bps with 8 bits of data, 1 start bit, 1 stop bit, and no parity (8-N-1). You can adjust the baud to any standard rate between 2400 and 38400bps. The power, ground and RX pins are all broken out to a 3.5mm pitch screw terminal.
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 +
== Pinout ==
 +
# Ground (VSS)
 +
# +5V (VDD)
 +
# Contrast adjustment (V0)
 +
# High/Low Register select signal (RS)
 +
# High/Low Read/Write signal (R/W)
 +
# High/Low Enable signal (E)
 +
# High/Low bus line (DB0)
 +
# High/Low bus line (DB1)
 +
# High/Low bus line (DB2)
 +
# High/Low bus line (DB3)
 +
# High/Low bus line (DB4)
 +
# High/Low bus line (DB5)
 +
# High/Low bus line (DB6)
 +
# High/Low bus line (DB7)
 +
# +4.2V for LED (A)
 +
# Power supply for BKL 0V (K)
  
 
== Features ==
 
== Features ==

Revision as of 04:14, 20 January 2010

The Serial Enabled LCD Backpack (SerLCD) is a product made by Sparkfun that allows control of a parallel based LCD over a single-wire serial interface. The SerLCD backpack takes care of all the HD44780 commands allowing seamless integration with any digital device that can communicate via a TTL serial line. The device is designed to handle a wide range of TTL serial baud rates, and currently supports 16 or 20 character wide screens with 2 or 4 lines of display.

Serial Enabled LCD Backpack (SerLCD)

A version 2 backpack.

General Information
Manufacturer SparkFun Electronics
Average Price $17
Specifications
Input Voltage 5 V
Max Input Voltage 5.5 V
Current Draw 3 mA w/o backlight
60mA w/ backlight
Clock Speed 8 MHz
Number of Positions 16
Measurements
Length 1.75 inches
Width 0.56 inches



Communication

Communication with SerLCD requires 5V TTL serial at a default baud rate of 9600bps with 8 bits of data, 1 start bit, 1 stop bit, and no parity (8-N-1). You can adjust the baud to any standard rate between 2400 and 38400bps. The power, ground and RX pins are all broken out to a 3.5mm pitch screw terminal.

Pinout

  1. Ground (VSS)
  2. +5V (VDD)
  3. Contrast adjustment (V0)
  4. High/Low Register select signal (RS)
  5. High/Low Read/Write signal (R/W)
  6. High/Low Enable signal (E)
  7. High/Low bus line (DB0)
  8. High/Low bus line (DB1)
  9. High/Low bus line (DB2)
  10. High/Low bus line (DB3)
  11. High/Low bus line (DB4)
  12. High/Low bus line (DB5)
  13. High/Low bus line (DB6)
  14. High/Low bus line (DB7)
  15. +4.2V for LED (A)
  16. Power supply for BKL 0V (K)

Features

  • New PIC 16F688 utilizes onboard UART for greater communication accuracy
  • Adjustable baud rates of 2400, 4800, 9600 (default), 14400, 19200 and 38400
  • Operational Backspace
  • Greater processing speed at 10MHz
  • Incoming buffer stores up to 80 characters
  • Backlight transistor can handle up to 1A
  • Pulse width modulation of backlight allows direct control of backlight brightness and current consumption
  • Potentiometer to control contrast
  • All surface mount design allows a backpack that is half the size of the original
  • Faster boot-up time
  • Boot-up display can be turned on/off via firmware
  • User definable splash screen

Arduino

SerLCD works seamlessly with the Arduino with the option of using the default serial transmission port, or by creating a SoftwareSerial port.

Code

See also

External links