Hardware Directory: MIPS M4K Multiprocessor Core

July 8, 2002
More embedded projects are incorporating multiple processors. Recognizing this opportunity, MIPS (www.mips.com) has delivered the MIPS M4K multiprocessor core. This MIPS32-based core improves performance and eases development in multiprocessor...

More embedded projects are incorporating multiple processors. Recognizing this opportunity, MIPS (www.mips.com) has delivered the MIPS M4K multiprocessor core. This MIPS32-based core improves performance and eases development in multiprocessor environments.

The M4K core addresses a number of areas that are key to multiprocessor system design, such as improved interprocess communication, specialized debug support, and enhanced configurability. In addition, the M4K eliminates the usual data cache, using instead low-latency, on-board SRAM to speed data movement. Eradicating the cache also helps reduce the die size. The most compact version of the M4K is approximately 0.3 mm2. The 0.13-µm G process uses 0.1 mW/MHz and runs at 200- to 240-MHz speeds, while the 0.13-µm LV process consumes more power and operates in the 250- to 300-MHz range.

The architecture employs a five-stage pipeline. It includes MIPS32 enhancements and supports user-defined instruction-set extensions and compact MIPS16 instructions. New bit-field manipulation instructions have been added, and a new SYNC instruction forces memory access synchronization among multiple processors.

The chip handles up to four zero-overhead context switches in hardware. Vectored interrupts are also supported, as are 64-bit coprocessors.

Debug enhancements were key to improving multiprocessor debugging. Hardware-based multiprocessor breakpoints are possible with a new TAP interface. The ability to stop multiple processors when a particular instruction or event occurs is often necessary when tracking down difficult bugs.

The M4K makes significant strides in multiprocessor integration and debugging. It's a good choice for new multiprocessor designs.

See associated figure.
See associated table.

Sponsored Recommendations

Highly Integrated 20A Digital Power Module for High Current Applications

March 20, 2024
Renesas latest power module delivers the highest efficiency (up to 94% peak) and fast time-to-market solution in an extremely small footprint. The RRM12120 is ideal for space...

Empowering Innovation: Your Power Partner for Tomorrow's Challenges

March 20, 2024
Discover how innovation, quality, and reliability are embedded into every aspect of Renesas' power products.

Article: Meeting the challenges of power conversion in e-bikes

March 18, 2024
Managing electrical noise in a compact and lightweight vehicle is a perpetual obstacle

Power modules provide high-efficiency conversion between 400V and 800V systems for electric vehicles

March 18, 2024
Porsche, Hyundai and GMC all are converting 400 – 800V today in very different ways. Learn more about how power modules stack up to these discrete designs.

Comments

To join the conversation, and become an exclusive member of Electronic Design, create an account today!