256 Mbit NOR Flash with Quad-SPI — what it brings to the board
It uses a SPI interface with Quad I/O support, clocked at 133 MHz for fast read throughput.
133 MHz Quad-SPI — read bandwidth for execute-in-place
The 133 MHz clock frequency on the Quad-SPI interface delivers a sustained read throughput that supports execute-in-place (XIP) from the Flash, reducing the need for a separate RAM buffer for firmware. For designs that shadow code to RAM at boot, the faster read speed shortens the startup time. The interface uses four I/O lines for data, so the PCB trace routing needs matched lengths on the four data lines to maintain signal integrity at this frequency.
The FL-S series is an established Infineon product line with broad distribution support.