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SYiwe's avatar
SYiwe
Icon for Occasional Contributor rankOccasional Contributor
6 years ago

Cannot access the JTAG port of Arria10 SoC

There’re two Arria 10 SoCs in my design, the follwoing picture indicates the JTAG chain on board. Chip A and Chip B share the same TCK & TMS. TCK is pulled down to GND and TMS is pulled up to VCCP...
JohnT_Altera's avatar
JohnT_Altera
Icon for Regular Contributor rankRegular Contributor
6 years ago
Hi, It is due the device might be in reset state which provided the wrong TDO where Quartus programmer detected it as shorted to gnd
SYiwe's avatar
SYiwe
Icon for Occasional Contributor rankOccasional Contributor
6 years ago

Thank you very much for your answer, John.

How can I confirm the device in reset state or not?

Besides, should I connect the TDI of usb blaster to the device's TDI or TDO?

Thanks, regards.