256 Mbit NOR Flash with Quad-SPI — what it brings to a design
The Infineon S25FL256SAGBHIB00 is a 256 Mbit FL-S series NOR Flash memory organized as 32M x 8 bits, accessed through an SPI Quad I/O interface running at 133 MHz. This density and speed suit code-shadowing, firmware-over-the-air staging, and data-logging in embedded systems that need fast read throughput without a parallel bus.
133 MHz Quad I/O — read bandwidth for boot and OTA
Quad I/O at 133 MHz delivers a sustained read throughput that can feed a Cortex-M or RISC-V core directly from the Flash, reducing the need for a large SRAM cache. The SPI interface keeps pin count low — four data lines plus clock and chip select — which simplifies PCB routing compared to a parallel NOR or NAND. For designs that already use a Quad-SPI controller, this part drops in without a bus-width mismatch.