NETGEAR WNR834B
Hardware Versions
| Model | CPU | Wireless | Flash | RAM | FCC ID |
|---|---|---|---|---|---|
| WNR834B v1 | BCM3302 | BCM4321 (PC-card) | 4MB | 16MB | PY306100032 |
| WNR834B v2 | BCM3302 | BCM4321 (integrated) | 4MB | 16MB | PY307100061 |
Supported Versions
Hardware Highlights
Installation
→ Install OpenWrt (generic explanation)
Please add the installation procedure here.
Important Information
 | This router contains a hidden partition called board_data. This partition contains essential information for the bootloader to function. A patch was introduced in trunk revision 22475 that provided support for this router by skipping over this essential area of flash. |
Hardware
| Architecture | MIPS (low endian) |
|---|---|
| Vendor | Broadcom |
| Bootloader | CFE 1.0.37 |
| System-On-Chip | BCM4704KFBG |
| Processor | BCM3302 v0.6 |
| CPU Speed | 264 MHz |
| Flash size | 4 MiB |
| RAM size | 16 MiB |
| Wireless | BCM4321 b/g/n Wireless (v1:mini-PCI card, v2:integrated) |
| Ethernet | BCM5325 |
| USB | No |
| Serial | Yes |
Circuit board - v2
Pads on PCB - v2
There are 3 sets of pads on the PCB of the WRN834B v2:
- Solder pads - JTAG - near radio shield, top edge of board. (unconfirmed)
- JP1 - Serial console, 3.3V, 115200/8/N
- J12 - JTAG (Confirmed working)
JP1
3.3v TTL Serial, 1 row of six pins
| Pin 1 | 3.3V |
| Pin 2 | RXD |
| Pin 3 | n/c |
| Pin 4 | n/c |
| Pin 5 | TXD |
| Pin 6 | GND |
J12
10-pin JTAG, 2 rows of 5 pins
R374 through R378 and R343 remain un-populated
| Pin 10 | GND | Pin 9 | TCK |
|---|---|---|---|
| Pin 8 | GND | Pin 7 | TMS |
| Pin 6 | GND | Pin 5 | TDO |
| Pin 4 | GND | Pin 3 | TDI |
| Pin 2 | GND | Pin 1 | TRST |
Solder pads
JTAG, 5 large pads
| R470 | TCK |
|---|---|
| R471 | TMS |
| R472 | TDO |
| R473 | TDI |
| n/a | TRST |
Circuit board - v1
Pads on PCB - v1
There is 1 set of holes on the PCB of the WRN834B v1:
- JP1 - Serial console, 3.3v, 115200/8/N
- There are no obvious or labeled solder pads for JTAG on the v1 circuit board. There are numerous small test points labeled TPnn on both sides of the board which may provide JTAG capability. The vacant mini-PCI pads on top of the board are another possibility.
JP1
3.3V TTL Serial
| Pin 1 | GND |
| Pin 2 | TXD |
| Pin 3 | RXD |
| Pin 4 | 3.3V |
TJTAG command parameters
If you were to somehow erase the board_data partition, this command will restore the data.
-flash:custom /window:1fc00000 /start:1ffe0000 /length:10000