The serial enabled LCD backpack allows you to control 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 micro that can communicate over a wide range of TTL serial baud rates. The SerLCD currently supports 16 and 20 character wide screens with 2 or 4 lines of display. Project description, more information and ordering can be found at https://www.sparkfun.com/products/258 SerLCD v2.5 Datasheet: http://www.sparkfun.com/datasheets/LCD/SerLCD_V2_5.PDF Pin Assignment: http://www.sparkfun.com/datasheets/LCD/SerLCD-PinAssignment.pdf Quickstart Guide: https://www.sparkfun.com/tutorials/246 Firmware: http://dlnmh9ip6v2uc.cloudfront.net/datasheets/LCD/Monochrome/serlcd-v2_7_2line_10MHz.zip Firmware: http://dlnmh9ip6v2uc.cloudfront.net/datasheets/LCD/Monochrome/serlcd-v2_7_4line_10MHz.zip