RTCC

Armored Cars

Can I use RTCC to trigger an interrupt and hold the intterupt routine until RTCC is cleared.· (RTCC is connected to an external source.)

This is basically what I am thinking of,

Interrupt
program stuff....
loop
jb·RTCC,loop············· ;hold until RTCC is cleared.
ret

Bean

You cannot read the state of the RTCC pin like that.
It doesn't work like a normal I/O pin.
You could tie the RTCC pin to another "normal" I/O pin and check the status of that pin.
Bean.

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"SX-Video·Module" Now available from Parallax for only $28.95

http://www.parallax.com/detail.asp?product_id=30012

Product web site: www.sxvm.com

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Armored Cars

Just hard wire it?

Bean

If you already have a current limit resistor going to the RTCC pin, then yes just connect the RTCC pin the I/O pin.
Because the RTCC can never be an output so there should never be a conflict.
Otherwise I would use a reasonable value (1K ?) resistor to the I/O pin.
Bean.

▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔
"SX-Video·Module" Now available from Parallax for only $28.95

http://www.parallax.com/detail.asp?product_id=30012

Product web site: www.sxvm.com

"One experiment is worth a thousand theories"
·