The SDP interface data path has both direction signals include data and handshake feedback.
The SDP interface has two modes in DC function mode.
- Dp_ack_sel=1: DP is on, then the handshake feedback comes from the DP feed to both the DC and PL.
- Dp_ack_sel=0: DP is off, then the handshake feedback comes from the PL feed to both DC.