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Problem in rs485 communication

Question asked by prasanth R on Jul 24, 2017
Latest reply on Jul 26, 2017 by prasanth R

Dear all,  

   I'm using lpc1768 controller with MAX487 chip for rs485 communication. I can receive a data from outside(terminal) properly via RS485. But sending has a problem. While sending it sends a junk data. If i provide a 100 Milli second delay for each byte send it works properly. My controller RTS pin drops some 800mV when connecting to MAX487 chip. I checked that MAX487 chip with PIC16f1937 controller that works fine. I don't know a reason for it didn't work with ARM controller.

    I need to know LPC1768 can support to MAX487 or not?  Please help me to solve my problem.

 

Thanks & Regards,

Prasanth.

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