Connecting and using an LCD module

This is the set of commands for all LCD panels which are driven with the HITACHI HD44780 controller, just check your panel for the chip.

The LCD panels can driven by 4 or 8 bits. There is also 3 control lines - EN (Enable), D/I (Data/Instruction) and R/W (Read/Write).
To connect with a minimum of wires you need 4+3 I/O lines in 4 bit mode.

Sequence for signals is as follows

               1st         2nd
               ____        ____
EN        ____|    |______|    |_____
              ____        ____
Data      ___|____|______|____|______
(4bit mode)   d4-d7        d3-d0

LCD Commands:

Exec.   DI RW b7 b6 b5 b4 b3 b2 b1 b0
1,52ms  0  0  0  0  0  0  0  0  0  1  Reset LCD Panel, Erase RAM
1,52ms  0  0  0  0  0  0  0  0  1  -  Cursor + AC=0, Display in origin position
37us    0  0  0  0  0  0  0  1 I/D S  Define cursor movment and shift display
37us    0  0  0  0  0  0  1  D  C  S  Display ON/OFF(D), cursor(C) and blonk
at                                       cursor position(B)
37us    0  0  0  0  0  1 S/L R/L-  -  Move the cursor and shift display
37us    0  0  0  0  1  DL N  F  -  -  Define bus length (DL), number of
line,                                         matrix font used (5x8 or 5x10)
37us    0  0  0  1  CG RAM Address    Define CG RAM Address
37us    0  0  1     DD RAM Address    Define DD RAM Address
0us     0  1  BF  Address counter AC  Read busy Flag & AC
37us    1  0     Write DATA           Write DATA into DD or CG RAM
37us    1  1     Read DATA            Read DATA from DD or CG RAM

Legend:

mwr  0000