133 MHz clock and Quad I/O — read bandwidth for the BOM
The S25FL256LAGBHN023: The 133 MHz SPI clock with Quad I/O and QPI modes delivers a sustained read throughput that standard single-bit SPI cannot match. For a design that shadows code from Flash to RAM at boot, this clock rate directly shortens the initialization time. The QPI mode reduces command overhead by operating the address and data phases on all four I/O lines, which matters when the host controller supports a quad interface natively.
The 24-TBGA package (8x6 mm body) requires a controlled reflow profile and post-assembly X-ray inspection to verify solder joint integrity under the BGA. Not a hand-solder or rework-friendly package — plan for stencil design and AOI coverage. The Tape & Reel delivery suits automated pick-and-place for volume production.