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2input serial port with 8051

Khawla Mohamed

I have a problem with interfacing two serial port with 8051 microcontroller. I have to use bar code reader and RF reciver and transmitter which both of them interfaced serially. I am thinking to add an ic to controller these to serial ports, but I don't know which type of IC I should used!!
could any one help me, please?

Thanks,

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  • 0 in reply to erik malund

    Sounds more like you are arguing with me instead of the OP.

    I definitely recommend a two-UART solution. I just note that it _may_ be possible to do a multiplexed kludge.

    I have used multiplexing when requiring output to two devices but only input from one. The processor had two UART (and didn't exist with more) and I needed to send to three devices. But multiplexing transmission is so very much easier, since the multiplexing can be synchronized with the transmissions.

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  • 0 in reply to erik malund

    Sounds more like you are arguing with me instead of the OP.

    I definitely recommend a two-UART solution. I just note that it _may_ be possible to do a multiplexed kludge.

    I have used multiplexing when requiring output to two devices but only input from one. The processor had two UART (and didn't exist with more) and I needed to send to three devices. But multiplexing transmission is so very much easier, since the multiplexing can be synchronized with the transmissions.

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