Subject:
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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 18:34:40 GMT
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Original-From:
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Jeszs Miguel Recuenco Ezquerra <jmrecu@encomix=NoSpam=.es>
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Viewed:
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1616 times
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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?
--
Jesús Recuenco
jmrecu@encomix.es
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