06-13-2018 07:35 PM
when i try to connect my custom board which the device is zcu4ev, i get a warning: CRITICAL WARNING: [Labtools 27-3421] xczu5_0 PL Power Status OFF, cannot connect PL TAP. Check POR_B signal.
and i check the por_b signal is ok
06-13-2018 07:56 PM
06-13-2018 11:54 PM
10-04-2018 05:19 AM
Has there been a resolution to this problem? I am having the exact same problem on two boards that I had been able to program previously. My part is a XCZU3EG. Also, both my PS_POR_B & PS_SRST_B signals are good.
10-04-2018 05:43 AM - edited 10-04-2018 06:23 AM
I just discovered something of interest...
This has something to do with my system being setup to boot from external QSPI Flash. If I change the jumpers such that I don't try and boot from the SPI Flash I can then program the spi flash. If I then kill power to the board, switch the jumpers back to boot from SPI Flash, and lastly turn on power it will work..
I suggest you try the above and see if this works for you.
One note: I did not have to do this initially. I am not sure why..
11-12-2018 03:34 AM
I have observed this behaviour from time to time. I don't know what steps lead to this, but usually it can be resolved by powering down the device completely. Keep in mind that JTAG provides power too, so you need to disconnect the JTAG in order to completely remove the power.