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Linksys E1000 v2.1
Linksys E1000a
Wireless-N Router




Linksys Routers


E1000 v2.1




Status Unknown


Status Unknown


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Serial Num. = CNV2
FCC ID = Q87-E1000V21
Industry Canada ID = 3839A-E1000V21
CPU Type = Broadcom BCM5357B0KFBG (BCM5357B)
MIPS Rev = ?
CPU Speed = 300MHz
Bus = ?
Flash Type = Serial
Flash Chip = ?
Flash Size = 4MB
Max Firmware Size = 3801088 bytes
RAM Size = 32MB
RAM Chip = ?
nvram Size = 32kb
Switch = Broadcom BCM5357B0 (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 = 12V/0.5A
Color of LEDs = ?
Size = 7.95" x 1.34" x 6.3" (202 x 34 x 160 mm)
USB = No
Serial Port = Yes
JTAG Port = Yes
Supported by TJTAG/Version = ?
Supported by dd-wrt as of = 16968
dd-wrt K2.4 Support = No
dd-wrt K2.6 Support = Yes
Special Features = ?

Radio (wl0)

Wireless Radio = Broadcom BCM5357B0 (SoC)
WLAN DSP processor = ?
Antenna Connector Type = 2x2, Internal
Wireless Standard = IEEE 802.11b/g/n
WiFi Operating Frequency = 2.4GHz
 802.11n Draft = up to 300Mbps
 802.11g = 6, 9, 12, 18, 24, 36, 48, 54Mbps
 802.11b = 1, 2, 5.5, 11Mbps
Radio cor_rev = ?
Radio Capabilities = ?

Links of Interest


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JTAG/Serial Info


JTAG Pinouts
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JTAG Recovery
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Serial Pinouts

E1000v2 serial

This image contains the pin outs for the E1000 v2.0 version, however
these pin outs are identical to the v2.1 version of the Linksys E1000 v2.1
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
Serial Interfaces

You need a level shifting 3.3v TTL adapter. You can get Nokia CA-42
cables online for about 3.00 and cut the phone end off. Then you have to
figure out what each wire does. You need only grd, tx and rx connected
properly for the serial interface to work.

When I plugged it into my XP rig...the cable was not recognized and no
drivers found during the PnP process.

I downloaded a utility determining the attached hardware (UVCViewer)

Then downloaded the Prolific Driver from here


Orange = GND Blue = Rx Red = Tx

Once loaded and laptop sees the unit attached to COM8....
configured Putty....and all is well.

LOM stated:

No there is no fixed standard for the colors of the wires and obviously
not on the number of wires either. My first CA-42 had 3 wires and the
ones I bought later had 5, the picture in my post above is from one of
those. You can carefully remove the plastic molding of the phone connector
and see where each wire is going and find out which color the respective
signals are on. Schematic of the Nokia phone connector here:

strfr stated: The "level shifting 3.3v TTL adapter" is must, you can't
connect router straight to standard RS232 serial interface. Learned after
hours of trying.. ;] Cheap CA-42 is all right, even the Chinese clone
with ARK3116 chip thus you will not find proper driver for Win7 64bit
system. Windows XP mode is the solutions in such a case.

Serial Commands

Erase Nvram

Power cycle the router and while it is booting hit control C quickly just
as your router starts You should get a CFE> prompt

The most common command you will use is the "nvram erase" command. This
command will erase the nvram values that are often the cause of bricked

At the cfe prompt:

cfe> nvram erase [enter]

To flash the firmware

This assumes you have a ttl adapter connected and ready to go. There is
reference to stock firmware. This does not apply to router that used to
run vxworks. All of those, have jtag tmk..

connect that bitch (the router to your serial adapter).. 115200,8,1,n and
no flow control are the com, param's

I use hyperterminal. In the terminal, boot the router.

Immediately start hitting ctrl-c. If you hit it right you will be at the
cfe prompt:


Execute the nvram erase command at the CFE prompt

Get the tftp utility ready to flash the STOCK firmware for your router so
all you need to do is hit enter to launch.

You are going to tell the router to accept a tftp flash of firmware. It
times out quickly so that is why you need to get the utility ready to

Static ip on your rig.., mask, not necessary but

At the cfe prompt:

flash -ctheader : flash1.trx

hit enter.. the router will want an upload of the firmware. It will time
out after three tries. Don't let it time out, now launch the tftp utility.
It will upload, program and then you will be back at the cfe prompt. This
will take some time. You will see what is happening in the console.

You will be back at the cfe prompt when it is done:


issue a "go" command:

go [enter]

the router will launch its new firmware.

Let it boot. It will boot 2 ~ 3 times.. You are done.

Now install some custom firmware again.

Good Luck..

vlan Info

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FCC Pictures

With Switch

Linksys E1000 v2.1 FCC aw Linksys E1000 v2.1 FCC bw Linksys E1000 v2.1 FCC cw

Linksys E1000 v2.1 FCC dw Linksys E1000 v2.1 FCC ew Linksys E1000 v2.1 FCC fw

Linksys E1000 v2.1 FCC gw Linksys E1000 v2.1 FCC hw

Without Switch

Linksys E1000 v2.1 FCC aw Linksys E1000 v2.1 FCC bwo Linksys E1000 v2.1 FCC cw

Linksys E1000 v2.1 FCC dwo Linksys E1000 v2.1 FCC ewo Linksys E1000 v2.1 FCC fwo

Linksys E1000 v2.1 FCC gwo Linksys E1000 v2.1 FCC hwo


root@DD-WRT:/# cat /proc/cpuinfo
system type : Broadcom BCM5357 chip rev 1
processor : 0
cpu model : MIPS 74K V4.9
BogoMIPS : 149.91
wait instruction : no
microsecond timers : yes
tlb_entries : 64
extra interrupt vector : no
hardware watchpoint : yes
ASEs implemented : mips16 dsp
shadow register sets : 1
VCED exceptions : not available
VCEI exceptions : not available

Hardware Modification

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