Lexra LX5280

Info

 * Processor Identification: 0000c601 (Processor ID: 0xc6; Rev: 0x01)
 * MIPS I programming model (except unaligned loads, stores)
 * MIPS R3000 exception handling model.
 * 6-stage pipeline.
 * Supports EJTAG Draft 2.0 for debugging.


 * More info can be found here: Lexra

Lexra
Lexra did implement a 32-bit variant of the MIPS architecture. Noteworthy architectural feature was the lack
 * https://www.linux-mips.org/wiki/Lexra • Jonah Probell has written a history of Lexra.
 * of the MIPS I instructions  and   that optimize the handling of unaligned loads.

Later the LX4580 core added hardware multithreading. Products implementing Lexra's architecture include
 * the LX4080, LX4080P, LX4180, LX4280, LX5280 and LX8000. Today Lexra is a defunct company.

Several key employees of Lexra founded the digital video core company Ultra Data Corporation,
 * the intellectual property assets of which have since been acquired.

Many other key Lexra employees, including co-founder and CEO, Charlie Cheng, now work for ASIC vendor
 * Faraday Technology in Taiwan, Sunnyvale, CA, and Framingham, MA.

Lexra co-founder and CTO Pat Hays is now vice president of engineering for MIPS Technologies, Inc. in Mountain View.

Realtek RTL8181

 * The Realtek RTL8181 is a highly integrated SoC (System-on-a-Chip) with a high-performance 32-bit RISC microcontroller,
 * two Ethernet MACs and a WLAN controller embedded onto a single chip. PCI Bridge 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