The Codasip L50 is a 32-bit (RV32) core, designed by Codasip. It is available in 2 variants:

Minimum required J-Link software version

The L50 / L50F 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.