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Asus WL-520GC
Asus WL-520GCa.png




Asus Routers




Not for 2MB Devices


Not for 2MB Devices


Not for 2MB Devices

WARNING: It is recommended to use ASUS Firmware restoration tool for ASUS routers initial flash
(use *.TRX file)

NOTE: This router supports Micro-plus.
NOTE: During configuration or flashing a device, the only that should be hooked to the device is the computer and power.


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Serial Num. = ?
CPU Type = Broadcom BCM5354KFBG (BCM5354K SoC)
MIPS Rev = ?
CPU Speed = 240MHz
Bus = ?
Flash Type = Parallel
Flash Chip = MX 29LV160CBTC
Flash Size = 2MB
Max Firmware Size = 1769472 bytes
RAM Size = 16MB
RAM Chip = Samsung 707 K4S281632I-UC60
nvram Size = ?
Switch = Broadcom BCM5354KFBG (BCM5354K SoC)
Port-based vlan = ?
802.1q vlan = ?
Ethernet Port Count = 1-10/100-WAN 4-10/100-LAN
Wired Standard = IEEE 802.3/3u
boot_wait = ?
bootloader = CFE
Flash Card Socket/Type = No
SD/MMC Mod Support = No
MiniPCI slots = No
PoE = No
Power = 5
Color of LEDs = ?
Size = ?
USB = No
Serial Port = Yes
JTAG Port = No
Supported by TJTAG 3.02 = No
Supported by dd-wrt as of = v24 micro build 8257
dd-wrt K2.4 Support = ?
dd-wrt K2.6 Support = No
Special Features = ?

Radio (wl0)

Wireless Radio = Broadcom BCM5354KFBG (BCM5354K SoC)
WLAN DSP processor = ?
Antenna Connector Type = RP-SMA
Wireless Standard = IEEE 802.11b/g
WiFi Operating Frequency = 2.4GHz - 2.5GHz
 802.11g = 6, 9, 12, 18, 24, 36, 48, 54Mbps
 802.11b = 1, 2, 5.5, 11Mbps
Channels = 11 CH (US, Canada), 13 CH (ETSI), 14 CH (Japan) 
Radio cor_rev = ?
Radio Capabilities =?

Links of Interest[]

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Because this router has only 2MB of flash, you must use a micro-generic build of DD-WRT.

This router supports Micro-plus

Users have experienced successful flashes directly from the web interface on the default factory firmware i.e. the ASUS Flash tool is not required. If this fails, revert to using the tool. (See notes below if you are using ASUS FW newer than

Vermonohue 20:24, 6 November 2009 (CET)

(Original Asus FW: v2.0.1.1)

I used the following steps:


  1. Make sure you have another router to connect to the internet! Just in case you need help while your wl-520gc is mid upgrade.
  2. Download FW v2.0.0.8 from Asus web site.
  3. Download dd-wrt.v24_micro_generic.bin (build 13525) from here.
  4. Factory reset router through original FW web interface.
  5. Change your computer's IP address to, mask (may have to reboot pc.)
  6. Power cycle router.
  7. Rename new Asus FW from ... FW to ..fake. Keep .trx name. (Or some version higher than the one you have if you have higher than installed.)
  8. Upload fake Asus FW from previous step using Asus FW upload on web interface.
  9. Power cycle, do a restore factory defaults from web interface, Power cycle when it is done.
  10. Use web interface to upload "micro" dd-wrt FW. Leave router on for 5 minutes after uploading!
  11. Power cycle, browse to
  12. Change user, pass, and restore factory defaults from web interface. Leave power on for a few minutes.
  13. Power cycle.

I also managed to brick the router a few times learning how to do this. This is how I recovered:


  1. Power off router, push and hold reset button, plug in power, wait for power light to flash slowly, then release the reset. This should put you in the restore mode.
  2. Verify you can ping the router. Try if you don't know what the address is. You may need to use nmap if you are really stuck. You should see ttl=100 on the ping replies. If ttl=64, you may not be bricked!
  3. use tftp to connect to the router, and "put" the fake Asus FW. On OS X Tiger I open a terminal window, change to the directory with the FW, and type the following:
    • tftp (or whatever your router's IP is)
    • tftp> binary
    • tftp> put fake. (use the name you used in step6 from INSTALLING)
  4. LEAVE ROUTER ON for 5 minutes after tftp reports it is done uploading!!!
  5. Disconnect all cables, power cycle, wait 5 minutes with router on.
  6. Power cycle, restore factory settings from web interface.

I did NOT need to start a tftp server or daemon.

I did NOT use the mini_asus FW pre-load.

I did NOT use the clear_nvram.trx file.

I did NOT use the recover.trx file.

UNBRICKING V.2 --I2gh0st 20:53, 17 January 2010 (CET)

  1. Install ASUS utility
  2. Power off router, push and hold reset button, plug in power, wait for power light to flash slowly, then release the reset. This should put you in the restore mode.
  3. Go to "Start Menu\Programs\ASUS Utility\WL-520GC Wireless Router\Firmware Restoration"
  4. Select the latest bin file for router from dd-wrt site in my case "dd-wrt.v24_preSP2_micro_generic.bin"
  5. Wait for asus utility to finish the job, after this your router should be fine.


If dd-wrt is already on the router follow these instructions. If stock firmware is on the router follow the flashing instructions.

  1. Check for recommended builds here first.
  2. Set your computer to a static IP of (or to whatever subnet the router is on) Disable all firewalls and security. Disable wireless on your computer and only have the router connected to the flashing computer by the ethernet cable between the two.
  3. Hard reset or 30/30/30 (If the router supports it, if not, reset to defults in the GUI) prior to flashing. Wait. Check for password page on re-login and change password.
  4. Flash firmware. You can use the webgui except if you have a belkin router. (For belkin use tftp.exe to flash)
  5. least three minutes. Lights should return to normal. See important2, below. Failing to wait is how most people brick their routers.
  6. Do a power cycle of the router. (Unplug the cord, count to 30 and plug it back in.)
  7. Wait for the lights to return to normal usually about 2 minutes.
  8. Hard reset or 30/30/30 again (If the router supports it, if not, reset to defults in the GUI). Wait. Check for the password page and re-login to change the password. Then you can reconfigure your settings manually.
  9. Once configured set your computer back to autoIP and autoDNS.

Important1: This Hard reset or 30/30/30 works fine for Asus router, but you do have to power cycle after the reset.

Important2: After you flash the firmware, and before you do the hard reset, the router will be building some nvram settings. YOU MUST WAIT FOR THIS TO FINISH PRIOR TO DOING ANYTHING WITH THE ROUTER INCLUDING A HARD RESET. Usually, you can tell when this process is completed by the WAN light coming on, but it does take several minutes. Go have a beer. There are starting to be more and more people who BRICK their routers by not waiting until the nvram is rebuilt, PRIOR to doing a hard reset. YOU NEED TO WAIT!


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JTAG/Serial Info[]


JTAG Port = No


Serial Pinouts[]
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Hyper terminal Setup in Windows XP[]
In Windows XP, Click Start Button - All Programs - Accessories - 
   Communication - HyperTerminal
Enter a name for the connection, Click ok
Choose com port you adapter is plugged into, Click ok
 Bits per second = 115200
 Data Bits = 8
 Parity = none
 Stop bits = 1
 Flow control = none
Click ok
Click File - Save As, and select a place to save it to so you 
             don't have to enter the settings again.
Putty Setup in Windows XP[]
After installing putty, run it
 Serial line = The COM port your using for serial (ie. COM3)
 Speed = 115200
Click on Serial under Connection
 Serial line to connect to = same as above (Serial line)
 Speed (baud) = 115200
 Data bits = 8
 Stop bits = 1
 Parity = None
 Flow control = None
Click Session
 Enter a name for your connection under saved sessions
Click Save
Click Open
Serial Recovery[]
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vlan Info[]

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Asus WL-520GC Asus WL-520GC Asus WL-520GC

Asus WL-520GC

FCC Pictures[]

Asus WL-520gC FCC Asus WL-520gC FCC Asus WL-520gC FCC

Asus WL-520gC FCC Asus WL-520gC FCC Asus WL-520gC FCC

Asus WL-520gC FCC Asus WL-520gC FCC Asus WL-520gC FCC

Asus WL-520gC FCC Asus WL-520gC FCC Asus WL-520gC FCC

Asus WL-520gC FCC Asus WL-520gC FCC Asus WL-520gC FCC


  • Same as Deluxe, but DO NOT flash the clear_nvram or recover files - it will brick your router. Only flash the firmware file itself and then do a reset to factory settings via web GUI.
  • dd-wrt.v24_micro_generic should be used.
  • Using web-based firmware update (rename .bin to .trx)
  • Web interface from Asus firmware and newer doesn't allow to upload DD-WRT firmware, it reports corrupted file. You have to downgrade to Asus firmware in order to flash DD-WRT firmware using the GUI.
  • There also could be unable to downgrade to Asus firmware from newer version through web interface, easily soulution could be rename in order to flash DD-WRT firmware. Easy solution could be to rename a old firmware file (up to for example to "newer" WL520gc_2.0.1.2_EN.trx
  • Uploading via TFTP may not reset the router. Wait for 10-15 minutes and then power it down and up manually.

[Added by zorruno 11 Sep 2008]

  • confirmed with new WL-520GC out of box, using web interface only
  • needed first to downgrade Asus firmware to (here) using the method above by renaming it to WL520gc_2.0.1.1_EN.trx (version was in the router originally)
  • don't worry about looking for a .trx file for the next step, dd-wrt.v24_micro_generic.bin is fine (here). Did not need to rename this file as .trx, it uploaded fine with the .bin suffix.

[artemv, 16 Nov 2008]

  • needed to hard-reset the router after downgrading to (from to be able to load dd-wrt.v24_micro_generic

Hardware Modification[]