Forum Discussion

Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
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
Icon for Honored Contributor rankHonored Contributor
8 years ago

Hi,

yes, after programming of a project with the JTAG disabled is further JTAG programing no longer possible. But there is another non-JTAG programming method that can cope with the JTAG disable option but it is necessary to use a device programmer such as Altera Programming Unit APU or the 3rd party programmers from BPM, Data IO, Elnec or System General.

Regards,

Martin