baffi
Newbie level 3
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- Oct 12, 2007
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Good day,
I have some questions, if you will have time to dedicate to me.
I have the necessity to verify that the 8051 (Philips P89C51RC) installed on
my card, I don't understand because it stops, for problems hd or fw.
The control I would want could
cyclically be effected departed an interval of time second T=3.
Every suggestion is obviously well I accept, the photo of the card prototype
spun is in enclosure. Before having a printout to build I would want to introduce the
control in object. After I make a PCB.
Every according to the micro8051 reset 74hc423,
if the signal that arrives stays tall or low for
more than three seconds 74hc423 sends to a command of reset to 8051.
All ok
8051
h....__...__....__
l __| |__| |__| |__ ....
1s 1s 1s 1s 1s 1s
Controller only low
h
l ____________________
Bad 8051
8051
h....__...__
l __| |__| |_____________...
Controller
h........................................_
l ____________________| |__
reset 8051
In attach the scheme.
I hope to have been clear.
1000 thanks in advance.
I have some questions, if you will have time to dedicate to me.
I have the necessity to verify that the 8051 (Philips P89C51RC) installed on
my card, I don't understand because it stops, for problems hd or fw.
The control I would want could
cyclically be effected departed an interval of time second T=3.
Every suggestion is obviously well I accept, the photo of the card prototype
spun is in enclosure. Before having a printout to build I would want to introduce the
control in object. After I make a PCB.
Every according to the micro8051 reset 74hc423,
if the signal that arrives stays tall or low for
more than three seconds 74hc423 sends to a command of reset to 8051.
All ok
8051
h....__...__....__
l __| |__| |__| |__ ....
1s 1s 1s 1s 1s 1s
Controller only low
h
l ____________________
Bad 8051
8051
h....__...__
l __| |__| |_____________...
Controller
h........................................_
l ____________________| |__
reset 8051
In attach the scheme.
I hope to have been clear.
1000 thanks in advance.