Hardware Basics

Understanding router hardware is the foundation of unbricking. This page covers common hardware architectures and chip types.

The router CPU architecture determines firmware compatibility.

1. Widely used in entry-level routers
2. Representative brands: TP-Link, some Netgear models
3. Common models: MediaTek MT7620, MT7621
4. Characteristics: Low power consumption, low cost

1. Mainstream architecture in modern routers
2. Representative brands: Xiaomi, Huawei, some ASUS models
3. Common models: Broadcom BCM6753, Qualcomm IPQ5018
4. Characteristics: High performance, supports WiFi 6/7

1. Mostly seen in software routers
2. Representatives: Intel Celeron, J4125
3. Characteristics: High performance, runs full Linux

Flash chips store router firmware.

1. Large capacity (typically 128MB-256MB)
2. Common in mid-to-high-end routers
3. Supports large firmware
4. Many pins, pay attention to model

1. Smaller capacity (typically 8MB-32MB)
2. Common in entry-level routers
3. Few pins, relatively simple to solder
4. Slower speed

Memory is used for runtime data storage.

1. DDR1: Early routers, 32MB-64MB
2. DDR2: Mid-generation routers, 64MB-128MB
3. DDR3: Modern routers, 128MB-512MB

1. ESMT: Elite Semiconductor
2. Winbond: Winbond
3. Samsung: Samsung
4. Micron: Micron

TTL Serial typically has 4 or 6 pins.

1. Edge of motherboard near Ethernet ports
2. Near metal shielding
3. Reserved test points

1. Wide Area Network interface
2. Connect to optical modem or upstream network
3. Usually blue

1. Local Area Network interface
2. Connect to computer or other devices
3. Usually yellow

1. Mainstream: WiFi 6 (802.11ax)
2. New models: WiFi 7 (802.11be)
3. Bands: 2.4GHz + 5GHz (dual-band)
4. High-end: Tri-band (2.4GHz + 5GHz + 6GHz)

1. Controls wireless signal amplification
2. Affects wireless coverage range
3. Some can be replaced to enhance signal

1. Screwdriver set
2. USB-to-TTL module (CH340/PL2303)
3. Tweezers
4. Multimeter

1. Soldering iron (for soldering pins)
2. Hot air gun
3. Flash chip programmer
4. Oscilloscope (advanced diagnostics)

1. Prerequisites
2. Firmware Basics
3. TTL Serial Unbrick