44780 speed: 4 bit versus 8 bit?


I was wondering if there was any difference between the two bit-sizes as far as display speed. I would assume 8-bit would be twice as fast, but the update limits may be set by a different bottleneck in the hardware.


The 8-bit mode is only 'twice as fast' in terms of how long it takes to get your information to the LCD controller. Either way, the time is insignificant compared to the time it takes for the LCD controller to deal with that information. Other than programming complexity, which you are not concerned with if someone else wrote the library, there is really no good reason to use the 8-bit mode.


Oh, OK, thanks for the reply. I imagine I'll use 4-bit mode then.