Cyclone® V Hard Processor System Technical Reference Manual

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

16.4.11. Data Slave Sequential Access Detection

The quad SPI flash controller detects sequential accesses to the data slave interface by comparing the current access with the previous access. An access is sequential when it meets the following conditions:

  • The address of the current access sequentially follows the address of the previous access.
  • The direction of the current access (read or write) is the same as previous access.
  • The size of the current access (byte, half-word, or word) is the same as previous access.

When the access is detected as nonsequential, the sequential access to the flash device is terminated and a new sequential access begins. Intel recommends accessing the data slave sequentially. Sequential access has less command overhead, and therefore, increases data throughput.