The "handshake" requires a specific physical trigger while the device is powered off:
The is a specialized USB driver for Windows (and sometimes Linux) that allows a PC to communicate with a MediaTek system-on-chip (SoC) when the chip is in its BootROM (BROM) mode. BROM is the very first, immutable code executed by the MediaTek processor on power-up, stored inside the chip’s read-only memory.
The "handshake" requires a specific physical trigger while the device is powered off:
The is a specialized USB driver for Windows (and sometimes Linux) that allows a PC to communicate with a MediaTek system-on-chip (SoC) when the chip is in its BootROM (BROM) mode. BROM is the very first, immutable code executed by the MediaTek processor on power-up, stored inside the chip’s read-only memory. mtk brom mode driver