SPRUIU1C July 2020 – February 2024 DRA821U , DRA821U-Q1
PSI-L destination threads must first be enabled in order to accept data. Threads are enabled or disabled by setting or clearing the ENABLE bit in the PSI-L pairing registers for the thread. When a thread is disabled, it must drop any data phases which are sent but properly return the credits for the data phases which are dropped.
Once a thread is paired, the TR has been set up and the enable is asserted, the channel is armed and ready to be triggered to perform the specified set of write transactions.