133 MHz SPI — what it means for throughput
At 133 MHz single-data-rate SPI, the raw bit rate is 133 Mbps. That translates to roughly 16 MB/s read throughput in Fast Read mode — fast enough to support execute-in-place (XIP) from a moderate-speed MCU without stalling the core. The page program time of 2.8 ms and block erase times typical for this density keep write-heavy operations like OTA updates manageable.
