Aot4221sr Firmware Upgrade -

: Make sure the device is connected to a stable power source. If the device uses batteries, ensure they are fully charged. For networked devices, ensure a stable internet connection.

Device bricking, latch-up, or permanent EOS (Electrical Overstress) due to floating gates during the erase cycle.

For engineering samples or the official AOT4221SR Programmer’s Manual v2.2, contact AOS (Alpha & Omega Semiconductor) FAE support.