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Altera_Forum
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13 years ago

I/O states in Cyclone III in JTAG mode

Hello all, In Altera's application notes it is specified that during JTAG mode all I/O pins are tristated. It is sometimes mentioned that the weak pull ups are enabled when the I/O pins are t...
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Altera_Forum
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13 years ago

Weak-pullups are enabled depending on the configuration, if the device has been configured before activating BST mode. Otherwise inputs are high Z. Read the device handbook thoroughly, the question is answered therin.