The Codasip H50X is a 64-bit (RV64) core, designed by Codasip. It is available in 2 variants:

Minimum required J-Link software version

The H50X / H50XF device selection is supported since V7.24 of the J-Link software.

RTT support

RTT is automatically supported by J-Link if the core supports system bus access (SBA)
As SBA is a configuration option of the core, the configuration option must be chosen to have RTT support

See RTT.