Forum Discussion

SYiwe's avatar
SYiwe
Icon for Occasional Contributor rankOccasional Contributor
7 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
7 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
    7 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.