The QSPI dual-parallel mode increases performance by combining two QSPI devices with 4-bit data widths to create an 8-bit data bus width. The QSPI dual-parallel mode only supports each QSPI device in a 4-bit data bus width. The QSPI dual-parallel mode does not support QSPI devices in 1-bit or 2-bit data bus widths.
An example of the dual-parallel QSPI setup with the 32-bit addressing mode is shown in the following figure.
Figure 1. Dual-Parallel Quad SPI Interface Example
