The is the first piece of code that runs when you power on a MediaTek chipset. It is hardcoded into the silicon. Its job is to initialize the hardware and look for a bootloader to hand off control to. For developers and technicians, BROM mode is the "holy grail" because it allows for low-level communication with the device before the operating system or security software loads. The Significance of "efuse 0x146"
is a specific status code indicating that the hardware-level "SLA" (Serial Link Authentication) and "DAA" (Download Agent Authentication) are strictly enforced.
Note: This varies by model and carries a risk of hardware damage. 3. Authorized Flashing brom disabled by efuse 0x146
An (electronic fuse) is a microscopic fuse on the chip that can be "blown" (set permanently) by the manufacturer.
For some high-security devices (like newer Xiaomi or Oppo models), the only way to bypass this is using an . The tool connects to the manufacturer's server, verifies a digital signature, and "unlocks" the path for the flash tool to proceed despite the fuse status. Summary for Technicians If you see 0x146 : The is the first piece of code that
When you see this error, the device is essentially saying: "I refuse to enter the low-level BROM state because the hardware security fuse tells me it is forbidden." Why is this happening?
If the software-only "BROM jump" fails, you may have to open the device. By shorting a specific on the motherboard to Ground (GND) while plugging it in, you can sometimes force the processor to ignore the fuse's instruction and enter a functional BROM state. For developers and technicians, BROM mode is the
This error typically appears in tools like SP Flash Tool, MTK Client, or various "unlock boxes" (UnlockTool, Chimera, etc.). Here is a deep dive into what this means and what you can do about it. What is BROM?