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Altera_Forum
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8 years ago

The Jtag pins of the EPM7128s Cpld (MAX7000) can be used as IOs?

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 ...
Altera_Forum's avatar
Altera_Forum
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8 years ago

Thanks... But I don't want to disable the jtag pins.

So I can use GLCK1, GLCK2, GCLR and OE1 pins for general input then? How the chip knows then if the GCLR, for example, is a general input or a clear? In the recent MAXII for example there is an option for the chip to specify if these pins are general IOs or these specific functions. But for Max7000 there is no such option.