The is not a standard part number for an eMMC chip itself, but rather a Micron marking code (FBGA code) commonly found on embedded MultiMediaCards (eMMC) used in mobile devices. For technical "papers" or datasheets, you should look for the corresponding Micron part number MT128GASAO4U21 . Technical Overview Part Number : MT128GASAO4U21 (Micron). Capacity : It is typically a 128 GB eMMC module. Standard : Compliant with JEDEC/eMMC 5.1 standards.
| Metric | Value | |--------|-------| | Sequential Read (HS400) | 150–180 MB/s | | Sequential Write | 40–70 MB/s | | 4K Random Read (QD=1) | 4–6 MB/s | | 4K Random Write (QD=1) | 2–3 MB/s | | Access Latency | 0.8–1.2 ms | jz150 emmc