I have used all of the port pins on my 8051 device but have a spare interrupt pin. Is it possible to use this spare interrupt as an extra port pin for reading/writing?
you can wiggle an interrupt pin to your hearts delight if that interrupt is not enabled in the IE sfr. Erik
Is it possible to use this spare interrupt as an extra port pin for reading/writing? You should be able to. Check the datasheet for the alternate uses for the pin. If it's simply a port pin whose alternate use is an interrupt input then you can use it as an I/O pin. Jon
View all questions in Keil forum