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Article #16367

Re: HC11 EVB MC68HC24 PRU

#16367
From: technopagan priest
Date: Sat, 23 Jan 1993 19:47
27 lines
1767 bytes
In article <laird.727798045@pasture.ecn.purdue.edu> laird@pasture.ecn.purdue.edu (Kyler Laird) writes:
>tedwards@wam.umd.edu (technopagan priest) writes:
>>Hi!  I think I just toasted the MC68HC24 PRU (port replacement

>You idiot!  What'd you do?  Lay an input line across one of the
>12V rails?  (Gee, that's what I did...)

>University Sales (Relations/.../?) at Motorola sent me a new one
>when I told them I toasted mine.  I almost ordered one from Digi-
>Key or someone like that, but they wanted on the order of $35 for
>the chip!

Yeah, I think I probably dropped an input line on one of the
power rails (DOH!).  Unfortunately, I am not associated with the
fine learning institution where I got it from, and also it is
the old bigger EVB.  I assume the new EVBs use the same PRU,
am I right?  

What am I using it for?  Well, I have a quad D/A converter, and I
am using the HC11 to output digital X,Y positions for two galvometers
to move a laser beam around to do some animation.  Last night I
was using the A/D converter on the HC11 to read an analog joystick
for use in inputing the point positions, but somehere along the line,
I messed up, the output ports went into multiplexed mode, and 
the PRU got too hot to touch...

-Thomas
Technical Details
Message-ID: <1993Jan23.194747.7830@wam.umd.edu>
Path: arc1-ca.pugleaf.net!sparky!uunet!haven.umd.edu!wam.umd.edu!tedwards
References: <1993Jan23.024730.9720@wam.umd.edu> <laird.727798045@pasture.ecn.purdue.edu>

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Newsgroups: sci.electronics
Path: arc1-ca.pugleaf.net!sparky!uunet!haven.umd.edu!wam.umd.edu!tedwards
From: tedwards@wam.umd.edu (technopagan priest)
Subject: Re: HC11 EVB MC68HC24 PRU
Message-ID: <1993Jan23.194747.7830@wam.umd.edu>
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Organization: University of Maryland, College Park
References: <1993Jan23.024730.9720@wam.umd.edu> <laird.727798045@pasture.ecn.purdue.edu>
Date: Sat, 23 Jan 1993 19:47:47 GMT
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