Connecting to a Server with More Than 32 Devices in a JTAG Chain - 2023.2 English

Vivado Design Suite User Guide: Programming and Debugging (UG908)

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2023.2 English
It can connect to a server that has more than 32 devices in its JTAG chain in Vivado. You need to provide option max-jtag-devices at the startup of hw_server to enable the ability to detect more devices in a scan chain. The default value for this setting is 32.
Note: Increasing this number slows down the device discovery process, which in turn can slow down cable access.

Specify the max-jtag-devices option at hw_server start-up as follows:

hw_server -e "set max-jtag-devices 64"