Efuse 0x146 | Brom Disabled By

Before diving into the error, it is essential to understand the BROM (Boot ROM) . The BROM is the very first code that executes on a MediaTek or similar system-on-chip (SoC) when the device powers on. It is a small, read-only memory embedded inside the processor itself. The BROM cannot be modified or erased by the user or standard firmware updates. It is the "root of trust" for the boot process.

When you connect a dead or powered-off MediaTek device to a PC, the BROM is the component that listens for a handshake signal from tools like SP Flash Tool or Miracle Box. Once the handshake succeeds, the BROM loads the next-stage bootloader (preloader) into internal RAM for execution. brom disabled by efuse 0x146

brom disabled by efuse 0x146 has been observed in: Before diving into the error, it is essential

Initially, 0x146 errors were rare, appearing only in production-line devices after QA testing. However, since 2022-2023, MediaTek has mandated that OEMs blow this eFuse on shipped consumer devices for: Notable SoCs where 0x146 appears:

Notable SoCs where 0x146 appears:

Older chips like MT6580, MT6737, or MT6753 rarely, if ever, blow this eFuse.