Forum Discussion

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
1. Is the JTAG port of Arria 10 permanently damaged? How can I confirm that? It might happen. No way except replacing the device. 2. Currently I'm using Altera Usb Blaster, does usb blaster support Arria 10 SoC? Should I change to Altera Usb blaster II? Yes. Changing to blaster II will not help. 3. Do you have more suggestions for me to access the JTAG chain? From the schematic diagram, it shows only 2 device connected while in the JTAG chain debugger, it shows 3 device is connected. Could you confirm which connection is correct?
SYiwe's avatar
SYiwe
Icon for Occasional Contributor rankOccasional Contributor
6 years ago

I can confirm there're 2 devices in the JTAG chain. The part type is 10AS066N3F40.

Ideally I should see 4 components in JTAG Chain Debugger, 2 FPGAs and 2 HPSs.

So far I have two auto-detect results, with 3 components and 5 components respectively, as you can see in the following pictures. Both of the results have UNKNOWN_FE000001 as the first component.

I'm also wondering why there're one more device that I can't explain.

Thanks, regrads.