AN 1013: Using Generic QSPI Flash on Control Block-Based Devices

ID 855235
Date 6/30/2025
Public

3.4. Standard SPI Mode (1-1-1 Protocol)

All QSPI flash devices support Standard SPI mode. Standard SPI mode is used during Active Serial x1 (ASx1) configuration.

The control block communicates with the QSPI flash device by sending opcode, address, and write data through data line 0 (ASDO-to-ASDI), and receiving read data and response from the flash device through data line 1 (DATA-to-AS_DATA1).

The following figure illustrates the signal lines used.
Figure 4. Standard SPI Mode