Subject:
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Re: NXT - ARM7's and USB
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Newsgroups:
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lugnet.robotics
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Date:
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Sun, 8 Jan 2006 21:21:34 GMT
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Viewed:
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1600 times
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In lugnet.robotics, Chris Magno wrote:
>
> Im not a chip guru, can someone explain why the lego speck says the USB
> is input only? The PDF's for the ARM7 chip set(s) this could be, state
> the on board USB controller is bidirectional.
>
>
> questions, questions, questions.....
Hopefully an answer (I don't have 3...).
The actual micro doesn't have the full hardware needed to implement
communications. You still need to include transceiver/receiver hardware that
acts as the bridge between the cable and the micro. Lego probably skipped the
transceiver to cut costs.
Michael
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Message has 1 Reply:
 | | Re: NXT - ARM7's and USB
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| (...) or does Lego mean: - the USB controler can transport data bidirectional (how can it otherwise check the transmitted data) and - the USB controler is a Slave (can only be connected to a USB-Master, in general something big as a PC) Stef (...) (19 years ago, 8-Jan-06, to lugnet.robotics)
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Message is in Reply To:
| | NXT - ARM7's and USB
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| Im not a chip guru, can someone explain why the lego speck says the USB is input only? The PDF's for the ARM7 chip set(s) this could be, state the on board USB controller is bidirectional. questions, questions, questions..... Chris (19 years ago, 8-Jan-06, to lugnet.robotics)
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