Cyclone® V Hard Processor System Technical Reference Manual

ID 683126
Date 8/28/2023
Public
Document Table of Contents

19.5.4.2.3. Control Transfers

For control transfers, the application performs the following steps:

  1. Waits for the packet received interrupt from the controller
  2. Retrieves the packet from the receive buffer

Because the control transfer is governed by USB protocol, the controller always responds with an ACK handshake.