Subject:
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Re: HB does not enter on bootstrap mode
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Newsgroups:
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lugnet.robotics.handyboard
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Date:
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Tue, 11 Feb 1997 19:30:41 GMT
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Original-From:
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Fred G. Martin <fredm@media.mit.eduANTISPAM>
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Viewed:
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1649 times
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there is no special "mode unlock," so you may have a bad 6811.
-fred
In your message you said:
> Hola,
>
>
> I followed step 4.4 in the HB assembly manual. I hold down STOP-SW while
> powering on the board, then the battery LED light for 1/3 s, but the
> power light does not go OFF. I have checked that the MODA signal and the
> RESET are present at the 68HC11, but there is allways a high level at
> pin 21(TXD) of the 68HC11. I have clock signal on PIN 5 of 68HC11. With
> the 68HC11 unplugged, I tested the PWR LED shorting the pin 6 of RP4 to
> ground, and PWR LED goes off/on properly. So I think the problem is in
> the 68HC11.
>
> Is my 68HC11 damaged, or is locked in a "MODE of OPERATION" and need to
> be unlocked by an special operation?
> --
> Jeszs Recuenco
> jmrecu@encomix.es
>
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Message is in Reply To:
 | | HB does not enter on bootstrap mode
|
| Hola, I followed step 4.4 in the HB assembly manual. I hold down STOP-SW while powering on the board, then the battery LED light for 1/3 s, but the power light does not go OFF. I have checked that the MODA signal and the RESET are present at the (...) (28 years ago, 11-Feb-97, to lugnet.robotics.handyboard)
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