LCD Module

The LCD module has built-in fonts and can be used to display text by sending appropriate commands to the display controller, which is called HD44780. Detailed information for using the display is available in its datasheet. A schematic diagram of the LCD module showing connections to the Cyclone II FPGA is given in Figure 1. The associated signals appear in Table 1.

Figure 1. Schematic diagram of the LCD module.

Table 1. Signal assignments for the LCD Module.

Signal NameDescription
LCD_DATA[7:0] LCD Data
LCD_RW LCD Read/Write Select, 0 = Write, 1 = Read
LCD_EN LCD Enable
LCD_RS LCD Command/Data Select, 0 = Command, 1 = Data
LCD_ON LCD Power ON/OFF
LCD_BLON LCD Back Light ON/OFF

See DE2_pin_assignments.csv, a comma-delimited file that matches "standard" descriptive names to actual FPGA pin locations. This file can be directly opened in Microsoft Excel.

References


LCD datasheet (pdf)

DE2 User Manual, version 1.4, 2006. (pdf)


Maintained by John Loomis, last updated 29 January 2009