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Altera_Forum
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17 years ago

ByteBlaster 2 current consumption

Hi, I am using ByteBlaster 2 to burn my MAX2 device. My whole circuit current consumption is approx. 100mA. When I connect the ByteBlaster 2, the current consumption goes to approx. 250mA. After t...
Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
17 years ago

From the ByteBlaster II datasheet the operating current is 50mA max.

It looks like you might have some contention. Is your design driving any of the JTAG pins used for configuration?

Maybe when your device is configured your FPGA is using the TDI (Or other) pin as an output and driving back against the Byte Blaster .

I would check the pin out of your device and see if you are reusing the config pins as outputs.

Also check what the state of unused pins is set to.

Good luck