You're referring to the "SM3265AC Exclusive" feature. Here's what I was able to put together:
Uses a configurable BCH ECC engine to maintain data integrity even with read/write disturbances common in newer generation NAND. Package: Available in a compact 48-pin QFN green package. "Exclusive" Value Proposition sm3265ac exclusive
The Silicon Motion SM3265AC is a high-performance, single-channel USB 3.2 Gen 1 controller designed for cost-effective 2D/3D NAND flash drives with read speeds up to 130 MB/s. It supports advanced BCH ECC, varied NAND voltages (3.3V/1.8V/1.2V), and specialized data recovery for improved stability in consumer-grade storage. For more details, visit Silicon Motion Silicon Motion Products-USB Flash Drive-Silicon Motion You're referring to the "SM3265AC Exclusive" feature
SMI SM3265 MPTool V2.x or SMI MPTool 2017.If the translator (FTL) corrupts on this chip, professional recovery software (PC-3000) often sees the chip as a "ROM Mode 0" brick. Recovering the actual hex data from the NAND chip requires soldering and an expensive programmer. I2S (Inter-IC Sound) TDM (Time Division Multiplexing) PCM
Supports single-channel configurations with up to 4 NAND flash chips, including 2D MLC/TLC and modern 3D TLC/QLC.
SMI MPTool versions are named by year. For SM3265AC, you typically need versions released between 2014 and 2018.