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Altera_Forum's avatar
Altera_Forum
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13 years ago

Why do we need a SignalTapII that stores data on FPGA instead of...

transmitting it to the PC directly? I am sure that if a system is designed with the idea of interrupts sent to PC through JTAG, than all those thousands of samples can just be transmitted to the P...
Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
13 years ago

JTAG typicaly operates at 8 or 24MHz on Altera boards so factor in overhead that doesn't leave much bandwidth to sample in realtime. Normally if you need real time capture of data you use an external logic analyzer which is capable of keeping up with the data rate. Pumping that much data continuosly over JTAG makes about as much sense as draining a pool using a milkshake straw :)