It runs at a 133 MHz clock frequency, delivering read throughput suitable for code shadowing, execute-in-place (XIP) boot, and firmware-over-the-air staging.
133 MHz Quad I/O — throughput and timing margin
At 133 MHz, the Quad I/O interface reads four bits per clock cycle, giving an effective throughput that standard SPI at the same frequency cannot match. For a 3.3 V system running a Cortex-M or RISC-V core that boots from external Flash, this clock rate keeps the initial code fetch latency under a microsecond per 32-bit word.
No official successor has been announced, and the FL-S series remains a current offering in the 128 Mbit NOR Flash market.