Looks relatively straight forward after a quick peek at the datasheet.

1. Place your data on D0 to D6 using the Character Set shown in the datasheet. I.E. $41 would write an "A" to the display.
2. Take CE (chip enable) low on the display you want to display the character on.

Note: Data & CE must be stable before & after step 3.

3. Toggle WR from 1-0-1.
4. Return CE to logic 1.

CE allows you to place several displays on the same data bus & select (chip enable) individual units on the bus to write data to.

WR is used to strobe data into the display that's selected with CE.

Display brightness is controlled by the logic levels on pins 5 & 6 as shown in Table 3.

I haven't used this particular display, but I have used the HDSP-2112. http://www.rentron.com/PicBasic/Movi...ge_Display.htm