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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

Hi,

yes, the JTAG pins of the mentioned device can be used as general I/O pins. The selection of JTAG or general I/O is written into a device programming file. Dedicated clock (GCLK) and output enable (OE) pins can be used as general input but not output pins.

Regards,

Martin