How to use this IO chip?


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  1. #1
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    Dec 2012
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    Default How to use this IO chip?

    I have a box full of "usb1t11am" from fairchild, heres the datasheet link.
    I just dont understand how to hook it up, I thought these were USB to serial interface. I was hoping that I could hook these up to a USB on the computer and it automatically add a com port to PC. Then I use the UART IO on the PIC to send/receive.

    If anyone can tell me what pins go where, it doesnt have a good scematic in the datasheet.
    Chris


    Any man who has accomplished anything in electronics at one time or another has said... " STOP! WAIT! NOOO! Dangit.... Oh Well, Time to start over..."

  2. #2
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    Default Re: How to use this IO chip?

    Hi Chris,
    No, that chip is just the physical/electrical interface between a "device" and the USB bus. It doesn't implement any of the USB protocol nor any CDC/VCP stuff. It's to USB what a MAX232 is to asynchronus serial or what a SN75176 is to a RS422 bus - something like that. No intelligence, no protocol stuff, just "electric glue stuff".

    Apparently it's meant to be coupled to a FPGA running the Serial Interface Engine in order to implement a complete USB solution. I don't know much about the low level stuff of USB but trying to implement this in PBP sounds pretty much impossible.

    /Henrik.

  3. #3
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    Default Re: How to use this IO chip?

    Dang, ok well thanks for the info. thought it must be to good to be true.
    Chris


    Any man who has accomplished anything in electronics at one time or another has said... " STOP! WAIT! NOOO! Dangit.... Oh Well, Time to start over..."

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