128 Mbit NOR Flash on a 133 MHz SPI bus
The Micron MT25QL128ABA8ESF-0SIT TR is a 128 Mbit serial NOR Flash memory organized as 16M x 8 bits, accessed over an SPI bus running up to 133 MHz. That clock rate translates to a sustained read throughput that keeps a Cortex-M or similar MCU fed during execute-in-place (XIP) boot sequences, provided the host controller can match the bus speed. The part is non-volatile, so firmware images and calibration constants survive power cycles without a backup battery.
Page program timing and write endurance
Write-cycle time is 8 ms for a word program and 2.8 ms for a page program.