AT89S51 + 16x2 LCD

Hi Rickey, I'm trying to write some code for above parts.

1). For 8-bit operation : P0.0 - P0.7 for data and P3.2, P3.3 & P3.4 for RS, RW and E. Will I have problem with Port O as it is an open drain type ?. Will I need pull ups resistor for P0 ?.

2). For 4-bit operation : P0.4 - P0.7 for data and P3.2, P3.3 & P3.4 for RS, RW and E. Same question as above.

Thanks,
SGH
... Read Compelte post
Other Tags: p3   p0   pull ups   amp   open drain   
Posted by SGH on Sat Apr 21 2007, 11:50 am

Downloads

Comments

NaKrutkADamb
Wed May 15 2024, 12:03 am
MichaelGot
Tue May 14 2024, 04:08 pm
FrankTrelm
Tue May 14 2024, 10:39 am
BillyTum
Tue May 14 2024, 09:08 am
Loganbag
Tue May 14 2024, 04:05 am
MichaelMog
Tue May 14 2024, 03:58 am
ThomasGaxaW
Mon May 13 2024, 05:33 pm
RobertInfup
Mon May 13 2024, 04:28 pm