Forum Discussion

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

Stratix III- JTAG header power supply issue...

Hi, We have custom-designed Stratix III FPGA boards for our particle tracking experiments. One board gave an error while configuring the device. Later we found that 8-mil trace which powered(3.3V)...
Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
16 years ago

I would expect a static fusing current in a 1 A order of magnitude for the 8 mils trace. I my opinion, it's effectively impossible to sink it by the USB Blaster driver circuitry, except if it has an massive short. It surely won't continue normal operation after this event.

For a detailed analysis of short circuit behaviour, you have to consider the different driver hardware of Altera Rev. B, Rev. C and Terasic USB Blaster.

As another question, have you connected the JTAG unused pins different from Altera suggestions?