Automotive-grade NOR flash for code storage
The S25FL512SAGBHBC13 is an Infineon FL-S series 512 Mbit NOR flash organized as 64M x 8, qualified to AEC-Q100 for automotive applications. It runs on a 2.7V to 3.6V supply and clocks up to 133 MHz over a Quad SPI interface — enough to support XIP (execute-in-place) for Cortex-M and -R cores without external RAM.
Temperature grade and package constraints
The 24-TBGA package (8x6 mm body) requires a 4-layer PCB for fan-out — the 0.80 mm ball pitch leaves room for two signal layers between the BGA pads if the stack-up is planned.
Infineon lists this part as Active in the FL-S family. The base product number S25FL512 covers multiple speed and temperature grades, so the BGA footprint is shared across the family — a future speed or temp upgrade stays pin-compatible.
Interface speed and memory organization
Quad SPI at 133 MHz delivers 66 MB/s read throughput in quad mode — enough to shadow a 512 Mbit image in under two seconds. The 64M x 8 organization maps naturally to a 64 MB address space, leaving the upper 64 MB of the 512 Mbit for OTA staging or parameter storage.