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Altera_Forum
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14 years ago

JTAG interface

Hello, I would like to interface Cyclone IV JTAG interface via both ways : 1. JTAG USB blaster. 2. FTDI FT2232 MPSSE interface. I am using VCCIO 3.3V in Jtag bank and in figure 8-23 in c...
Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
14 years ago

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Is there anything wrong with me using the open drain buffer?

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It's unable to drive the JTAG signals without adding strong (e.g. 470 ohm) pull-up resistors. Not a good idea at all.