Hi, I'm doing a little project with an old Max 7000 EPM7128S Cpld. I'm already using all normal IOs, but I need four more. Seems that the Jtag pins can be used as IOs.
Is it true? If so, how the Cpld knows when to use the Jtag pins or the IOs? By the voltage?
And about the GLCK1, GLCK2. GCLR and OE1 pins? These are listed also has Input, but I cannot use it as a general purpose IO? In recent cplds we can use this pins as generic IOs.
The datasheet is here:
https://www.altera.com/en_US/pdfs/li...ives/m7000.pdf
thanks
Is it true? If so, how the Cpld knows when to use the Jtag pins or the IOs? By the voltage?
And about the GLCK1, GLCK2. GCLR and OE1 pins? These are listed also has Input, but I cannot use it as a general purpose IO? In recent cplds we can use this pins as generic IOs.
The datasheet is here:
https://www.altera.com/en_US/pdfs/li...ives/m7000.pdf
thanks