JTAG Header for HPS and FPGA

Hi Joe,

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Hello, I would like to use one JTAG header for the FPGA side and one header for the HPS side of the side will this be a problem? I thought this would make this less complex. My co-worker daisy-chained the JTAG with the FPGA being first in the chain and then the HPS. I've looked at the documentation but haven't found an example of using a separate header. Can anyone help?

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I think you probably want to have two separate connectors, but not for the reason you state.

ARM processor JTAG interfaces include the JTAG signals and a number of other trace signals. If you look at the Altera Cyclone SoC Development kit schematic (contained within the ES .zip file installation) you'll see that the board has a Mictor connector for the HPS JTAG and trace signals, and then a USB-Blaster connector on another page. I do not have this board, so have not read the details on the two JTAG interfaces. I recommend you take a look at it.

Research the connectors used by commercial ARM debuggers and see if they come with the Mictor connector, or some other adapter, I recall a 20-pin adapter being used by some ARM processors.

Cheers,

Dave