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Altera_Forum
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15 years ago

USB Blaster and other JTAG devices in chain

hello, I have a board with three devices that are connected to each other in a JTAG chain: CPU, FPGA (Altera Cyclon IV), PCI-Express switch. We connected a USB-Blaster to the chain JTAG connec...
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Altera_Forum
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15 years ago

Did you define the other devices in the chain description file? It's necessary, to specify the correct instruction register length, otherwise they can't be bypassed (and access to the Altera devices also won't work). I previously said, the data should be imported from BSDL files, but they can be entered manually as well.