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JPA's avatar
JPA
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4 years ago

MAX V, USB Blaster Rev C, chain is broken, 1.8V

Have a feeling this is something simple/stupid...trying to bring up a new MAX V design and program it with a USB Blaster (Linux) and it says chain is broken and it can't detect device. Same PC hard...
JPA's avatar
JPA
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4 years ago

Not using MAX V Development kit, this is a new custom design. I do have a MAX 10 Dev kit available, and the PC software/hardware works with it. So the differences between working and not working are MAX 10 vs MAX V, Dev kit vs custom design, 3.3V interfacing vs 1.8V interfacing.

The fact that I'm getting signals on TDI and TDO makes me think that the problem is in the 1.8V interfacing, but without a schematic for the USB Blaster, it's hard to know. It could certainly be a problem with my design.

John