Port outputs OK in loop, but not in another part of program...

Hi all, Glad to have found this forum a little over a week ago. I've been referring to it frequently to help with writing my program, and found a lot of useful information in here. Thank you, contributing...
Port outputs OK in loop, but not in another part of program...

Hi all, Glad to have found this forum a little over a week ago. I've been referring to it frequently to help with writing my program, and found a lot of useful information in here. Thank you, contributing...
Output data to GP I/O on MCU Port 4 output with STuPSD3254A

Hi, I hope someone can help me: I have to output data (8 bit) to port 4 of MCU (I'm using a STuPSD3254A. I've proper configured pins and registers but how can put data in output? Bye!
Output data to GP I/O on MCU Port 4 output with STuPSD3254A

Hi, I hope someone can help me: I have to output data (8 bit) to port 4 of MCU (I'm using a STuPSD3254A. I've proper configured pins and registers but how can put data in output? Bye!
initializing a port as output

I have to initialise the port P1 of the 89C51 as output port with all port lines initialised to a high state i.e. 1. Now for initialising the port P1 as output, I have to give the instruction P1 = 0x00...