Toshiba Introduces New 64 bit RISC Microprocessors, Derivatives of TX49 Family|
22 April, 1999
Tokyo--Toshiba Corporation today announced two additions to its TX49 family of high performance RISC microprocessors derived from architecture developed by US-based MIPS Technologies Inc. The new chips, TMPR4955F and TMPR4956F, employ a new core, the TX49/H, that surpasses the operating speed of its predecessor, the TX49. Both are fabricated with advanced 0.25 microns process technology and have a multiple metal-layer design supporting chip shrink. The microprocessors are available in 167 megahertz (MHz) and 200MHz versions and will find their main application in laser beam printers, set-top boxes and networking products.
Connection to external ASICs and memory devices is supported by a SysAD bus system interface, while a Floating Point Unit (FPU) co-processor supports complex transactions, such as processing large 3D graphics data files. At 200 MHz operation, TMPR4955F-200 and TMPR4956F-200, can handle such graphics 170 percentage (%) faster than Toshiba's current top-of-the-line derivative, TMPR4951-133. The new processors also offer double the data cache memory capacity and lower power consumption: 1.8W at 200MHz; 2.5V for CPU operation and 3.3V for I/O operations. A debug support unit (DSU) is also incorporated in the design. It sets a breaking point in system operation to check data in the cache memory and resistor, supporting real-time data analysis.
Toshiba offers a wide range of ASIC-based LSI that facilitate the combination of logic circuits with core processors to form computer-on silicon (COS) solutions. This fusion of computer-system technology and silicon technology meets diverse demands for system-based applications.
Specifications of TMPR4955F
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