For LCD on Spartan3E Board: RS R/W DB7 DB6 DB5 DB4 DB3 DB2 DB1 DB0 === === === === === === === === === === 0 0 0 0 1 0 1 0 * *
In General: RS R/W DB7 DB6 DB5 DB4 DB3 DB2 DB1 DB0 === === === === === === === === === === 0 0 0 0 1 DL N F * *Sets interface data length (DL), number of display lines (N) and character font (F)
Details
The Starter Kit board supports a single function set with value 0x28.
DL: Sets interface data length
Data is sent or received in 4 bit lengths (DB7-DB4) when DL = 0
When the 4 bit length is selected, data must be sent or received twice.
F: Sets character font
Note
Perform the function at the start of the program before executing any
instructions (except "Busy flag/address read").
display Character Duty
N F lines Font Factor Remarks
=== ======= ========= ====== =======
0 0 1 5x 7 dots 1/8 -
0 1 1 5x10 dots 1/11 -
1 * 2 5x 7 dots 1/16 Cannot display 2 lines with
5x10 dot character font