DEFINE LCD_BITS 8 vs. DEFINE LCD_BITS 4

Determines if you want to have 8 or 4 wires going to your LCD (they are capable of either). Four bits saves on PIC-pins, interconnections, connectors etc but at the expense that each command or displayed byte is transferred 4 bits at a time therefore the event takes twice as long as with 8-bit transfer. Unless you have an application where writing to the LCD needs to be done at top speed (eg PIC version of Quake), 4-bits is adequate.

Melanie