LTC2862A-2

Hi all,

I am trying to communicate with two LTC2862A-2 transceiver IC's. I set te first one on Transmit mode (DE '1') and (RE '1') and the other one on receive (DE '0') and (RE '0') hard coded in the two microcontrollers attached to it. If I send data to the transmitter the output lines are very nice the opposite direction when switching from '0' to '1'. If I look at the receiver side the receiver output pin "RO" is always high and will only drop 800mV with a zero. This drop is too little to be considered as a zero by the mircrocontroller. Attached some pictures, The pull up and down resistors are not placed, I set the DE and RE with the microcontroller. 

Thanks!

attachments.zip
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  • Hi Neil,

    Thanks for your fast response!

    I found the problem... I made a master/slave board in one and connected the master TX to slave RX then from the master TX to the transceiver TX to send the data to other slaves. This doesn't work because now is also the slave TX connected to the ''RO" from the transceiver.... I need an extra transceiver to accomplish what I want. 

    Thanks for your time. If you have a better idea that would be great. 

    Regards,

    Rudy

Reply
  • Hi Neil,

    Thanks for your fast response!

    I found the problem... I made a master/slave board in one and connected the master TX to slave RX then from the master TX to the transceiver TX to send the data to other slaves. This doesn't work because now is also the slave TX connected to the ''RO" from the transceiver.... I need an extra transceiver to accomplish what I want. 

    Thanks for your time. If you have a better idea that would be great. 

    Regards,

    Rudy

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