64 Mbit NOR Flash — AEC-Q100 qualified, now obsolete
The Infineon S25FL164K0XMFA000 is a 64 Mbit NOR flash memory from the FL1-K series, qualified to AEC-Q100 Grade 3 for automotive applications.
108 MHz quad-I/O read — throughput for firmware execution
The 108 MHz clock rate applies to the SPI Quad I/O interface, where four data lines transfer simultaneously. This yields a theoretical read throughput of 54 MB/s — enough for execute-in-place (XIP) code shadowing from NOR flash without a separate DRAM cache. The memory is organized as 8M x 8 bits, byte-addressable, with a page write cycle time of 3 ms typical. Firmware update windows should budget this per page; a full 64 Mbit erase and rewrite takes significantly longer due to sector erase overhead.
AEC-Q100 Grade 3 — automotive cabin and industrial use
AEC-Q100 qualification means the device has passed stress tests for temperature cycling, ESD (HBM/CDM), latch-up, and early-life failure rate — the standard for automotive-grade ICs.