• 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...
  • help on output port programming
    Hi all! I m a SY E&C student. And m working on a microcontroller based project.The one i m using is AT89C2051. To test it i wrote a sample program and loaded it in the controller using a universal programmer...
  • Define the ports of AT89C51 as input or output.
    I m using AT89C51 for digital clock, with external clock. i want to set the port0-1-2 for parallel data, and port3 for serial data the problem is to define the port as input or Output Master...
  • output confusion
    I use an RF 315/434 MHz ASK RECEIVER and 315/434 MHz ASK TRANSMITTER for the communication between two 89c52 microcontrollers. I am a beginner. In the transmitter microcontroller i use the normal code...
  • no uart output
    Hi, I'm using the C51 compiler and running the SIO sample projects with an AT89s52 atmel microcontroller. The code compiles fine and I've run various simple I/O and timer programs successfully. When...