Intel® Agilex™ Hard Processor System Technical Reference Manual

ID 683567
Date 2/14/2023
Public

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16.5.9.4.2. Recovery after CCS Timeout

If a timeout occurs while waiting for the CCS, the host needs to send the CCSD command followed by a STOP command to abort the pending ATA command. The host can set up the controller to send an internally-generated STOP command after sending the CCSD pattern:
  • Send CCSD command—set the send_ccsd bit in the ctrl register to 1.
  • Send external STOP command—terminate the data transfer between the CE‑ATA card device and the controller. For more information about sending the STOP command, refer to Transfer Stop and Abort Commands.
  • Send internal STOP command—set the send_auto_stop_ccsd bit in the ctrl register to 1, which tells the controller to send the internally-generated STOP command. After sending the STOP command, the controller sets the acd bit in the rintsts register to 1. The send_auto_stop_ccsd bit must be set to 1 along with setting the send_ccsd bit.