The Seiko L1672 LCD is: 2 lines by 16 characters, 5 X 7 dot matrix.

It is able to display alpha numeric, Japanese KATA KANA characters and a wide variety of other symbols.

The internal operation is determined by the input signals. These signals are:

RS - Register select input consisting instruction register (IR) when RS = 0 and data register (DR) when RS = 1.

R/W - Read/write. Write when R/W = 0 and read when R/W =1.

Data bus.

E - Enable.

Each time the LCD turned on or reset, an initialization procedure must be executed. The initialization sequence consists of turning on the cursor, clear the display, and set it to an auto-increment mode.

When the LCD is performing an internal instruction, set the RS signal to 0 for IR selection.

The instruction code is explained in the following chart:

LCDdriver.vhd –It follows all the specification as describe above. It is able to drive a 2 lines, 8 bits data transfer LCD.

LCD.vhd - The main LCD module. It uses the global clock which runs at 25.175MHz.

LCD_pack.vhd – The components used for the LCD driver.