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Altera_Forum
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17 years ago

USB Blaster Rev. B compatibly with Cyclone III Starter Board???

I am working with the Nios II Emb. Eval. Kit Cyclone III Edition and I am trying to configure the FPGA by USB Blaster Rev. B (taken from an Cyclone II Dev. Kit). But the connection is very unstable. ...
Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
17 years ago

I wonder, why you don't use the on-board USB-Blaster option with the Dev. Kit? However, I've been working with a USB-Blaster Rev. B on several customer boards without any problems. As a difference, the boards have an ESD protection circuit with 100 series resistors and dual schottky diodes voltage limiting diodes at all JTAG signals. It once has been said, that the TCK series resistor installed at the USB-Blaster should be increased to about 100 ohms to reduce problems with some boards.