Intel® Agilex™ Hard Processor System Technical Reference Manual

ID 683567
Date 11/11/2022
Public

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16.5.9.4.1. Disabling the CCS

While waiting for the CCS for an outstanding RW_BLK command, the host can disable the CCS by sending a CCSD command:
  • Send a CCSD command—the controller sends the CCSD command to the CE‑ATA card device if the send_ccsd bit is set to 1 in the ctrl register of the controller. This bit can be set only after a response is received for the RW_BLK command.
  • Send an internal stop command—send an internally-generated SD/SDIO STOP_TRANSMISSION (CMD12) command after sending the CCSD pattern. If the send_auto_stop_ccsd bit of the ctrl register is also set to 1 when the controller is set to send the CCSD pattern, the controller sends the internally-generated STOP command to the CMD pin. After sending the STOP command, the controller sets the acd bit in the rintsts register to 1.