Broadcom chips utilize the Common Firmware Environment (CFE). This is the first code executed when the device powers on. It initializes the CPU, memory controllers, and flash storage, then loads the main operating system kernel. CFE also provides a failsafe recovery mode, usually accessible via a serial connection or a hidden web interface, to unbrick devices.
: Integrated multi-mode xDSL transceiver with seamless fallback and VDSL2 G.vector support. bcm63381b0 firmware
Given its role as a cost-effective solution, the BCM63381 chip is found in many DSL modem-routers from various manufacturers. Here are some common examples: Broadcom chips utilize the Common Firmware Environment (CFE)