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Altera_Forum
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15 years ago

Can i use Jtag pins as I/O on MAX7128'S' device?

Hi All, I'm currently playing with some MAX EPM7128S-LC84 chips, ( i have bunches of them to use ). Currently i'm programming them via the JTAG interface (4 pins) and can access the rem...
Altera_Forum's avatar
Altera_Forum
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15 years ago

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If i assign the JTAG/IO pins within my design, will i still be able to program the device via JTAG?

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No you need a parallel programmer, e.g. Altera APU. If I remember right, it's mentioned somewhere in the datasheet. But it's obvious from the fact, that JTAG has no high voltage signalling to override an existing pin assignment that disables JTAG pins.