Hard Processor System Technical Reference Manual: Agilex™ 5 SoCs

ID 814346
Date 11/27/2024
Public
Document Table of Contents

5.3.6.4.2.3. NOP Descriptor

No-operation descriptor does not execute any Flash controller commands. It can be used as a dummy descriptor to create sync points or to generate interrupts. This descriptor can be inserted at the end of a descriptor chain to interrupt the host controller. The fields in the NOP descriptor are shown in the following table.

Table 197.  Fields Used in NOP Descriptor in CDMA Work Mode
Descriptor Value
Next pointer Next descriptor address. Address must follow the system bus restrictions
Command type 0xFFFF
Memory pointer System/host memory address required for data DMA commands.
Status The controller updates this field to indicate pass/fail status of the operation.