5.25 Read Burst with Wrap in QPI Mode (RBQPI)

The Read Burst with Wrap in QPI Mode (0CH) instruction enables wrap-around read in QPI mode. Both the wrap length and the number of dummy clock cycles are configured using the Set Read Parameters (C0H) instruction.

In QPI mode, the host initiates the operation by issuing the 0CH command, followed by a 3-byte address and the required dummy clocks. After the dummy clocks, the device outputs data on SIO[3:0], starting from the specified address. During the read operation, the internal Address Pointer automatically increments until the final byte of the configured burst length is reached, after which it wraps around to the first byte of the same burst region. All burst operations are aligned within the selected burst length. For example, with a burst length of eight bytes and a starting address of 06h, the read sequence proceeds as follows: 06h, 07h, 00h, 01h, 02h, 03h, 04h, 05h, 06h, and so on. This pattern repeats continuously until the operation is terminated by a low‑to‑high transition on CE#.