Realtek SOC

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Realtek RTL8181

The Realtek RTL8181 is a highly integrated System-on-a-Chip with a high-performance 32-bit RISC microcontroller, two Ethernet MACs and a WLAN 802.11b controller embedded onto a single chip. RTL8181P BGA version has a PCI Bridge which supports one external PCI/MiniPCI device.

The embedded Lexra LX5280 32-bit RISC CPU runs at up to 200MHz and features separate 8KB instruction and data caches.

Devices are based on the RTL8181:

Firmware

Most of the RTL8181-based devices comes with a simply bootloader and Linux as firmware. See a Minitar sourcecode and RTL8181-linux project. Seems, RTL8181 shares some code with ADM5120. Both they use CSYS header format and some applicatinos (i.e. setup), but RTL8181 firmware is Big-Endian.

RTL8181 JTAG

RTL8181 supports JTAG and MIPS EJTAG 2.0:

  • ManufID: 6
  • PartNumber: 5280

http://wireless.org.au/~jhecker/rtljtag/

Realtek RTL8180

Don't confuse the RTL8181 with the RTL8180. It's just plain WLAN chip, that also happens to be the one embedded on the RTL8181.