SW-DP could be 1 way communication

As for DPv2.,

  1. When you request a write, typically it should get acknowledge response as ok signal.  If it response a wait or fault and we continue writing all data, what will happen?
  2. If we write to different register by SW-DP continuously, how chance we could get wait or fault signal? Could we ignore Ack signal and just run?   
  3. If  power on /power off parts, SW-DP should be recovered, right?   
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