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Altera_Forum
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14 years ago

Can Cyclone IV JTAG VCC use separate 2.5V instead of VCCA?

The Cyclone IV handbook in section 8-47 says: --- Quote Start --- For device using VCCIO of 2.5, 3.0, and 3.3 V, refer to Figure 8–23. All I/O inputs must maintain a maximum AC volt...
Altera_Forum's avatar
Altera_Forum
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14 years ago

I don't use any protection on JTAG and had no problems. Look to the possible problem from the other side: what can cause voltage overshot in the USB Blaster if it's properly made by Altera?