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Altera_Forum's avatar
Altera_Forum
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21 years ago

USB Blaster replace/repair

I have a RevB USB-blaster (yellow cable) that has never worked (maybe once every 30 tries). Signal integrity on TCLK etc is very bad compared to ByteBlasterII. Replacing the long yellow flex ...
Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
21 years ago

I have the 1K pulldown on TCK, and 1K pullups on TMS, TDI. TDO has nothing.

Some of the pulses on TCK look OK, but many are runt pulses. There could be timing problems as well.

In contrast, the byteblasterII produces nice clean signals.