Sunnyvale, Calif.--Sept. 22, 1997--The Electronic Device Group of Mitsubishi Electronics America Inc. (Sunnyvale) announced a complete integrated chip set solution for cost-effective embedded system applications, such as PDAs, Internet phones, digital cameras, and other handheld portable applications. Mitsubishi's new family of peripheral I/O ASICs combines with its second-generation M32R/D microprocessor (with on-chip DRAM) to make a complete embedded system chipset solution.
Mitsubishi's new family of peripheral I/O ASICs gives developers the ability to connect peripherals to an M32R/D microprocessor-based embedded system, as well as to customize peripheral functionality for specific embedded applications. The first members of the new peripheral I/O ASIC family are the M65439A and M65455 products, which provide generic peripheral functionality to embedded systems. The main difference between the two peripheral I/O ASICs is that the M65439A offers a PC Card interface with two PC Card slots and the M65455 offers a liquid crystal display controller. The M65455 supports either monochrome (1/4 VGA, 1/2 VGA or full VGA) or color (1/4 VGA or 1/2 VGA) passive STN LCDs.
Manufactured in Mitsubishi's high-performance DRAM process technology, the second-generation M32R/D connects a small 32-bit RISC CPU core, 1 or 2 Mbytes of DRAM, and 4 kbytes of cache SRAM to an extraordinarily wide 128-bit internal bus. The result is that the M32R/D eliminates the performance bottleneck between conventional microprocessors and discrete DRAM in embedded systems. According to the Dhrystone 2.1 performance benchmark, the second-generation M32R/D microprocessor achieves a maximum performance rating of 52.4 VAX MIPS at 66.6 MHz with an internal microprocessor-DRAM data transfer speed of up to 1 Gbyte per second.
By incorporating a microprocessor and DRAM in the same silicon, the M32R/D also reduces power consumption and printed circuit board real estate by reducing overall system chip count and pin count. While discrete 16-Mbit (2-Mbyte) DRAM chips and 32-bit RISC processor chips together can have a total of 200 or more pins, the M32R/D microprocessor combines both DRAM and CPU into a package that has only 100 pins. The M32R/D achieves additional power savings by designing its 16-bit, 16.7 MHz external bus to take advantage of the lower data bandwidth requirements of peripherals for data communication. However, for higher performance peripheral applications, future versions of the M32R/D will offer customers the option of a 32-bit external bus. Mitsubishi has a complete set of software development tools available for developing M32R/D microprocessor-based systems, such as third-party embedded real-time operating systems, C compilers, debuggers, and emulators.
The M65439A and M65455 peripheral I/O ASICs are each available in a 176-pin TQFP package that occupies a 24 by 24 mm footprint. The M65439A is currently sampling and in volume production. The M65455 is currently sampling with volume production scheduled for the fourth quarter of 1997. The M65439A and M65455 are priced at $10 and $12 each, respectively, in 10,000-unit quantities. The 2-Mbyte and 1-Mbyte DRAM options of the M32R/D microprocessor, product numbers M32000D4A and M32000D3, respectively, are each available in a 100-pin TQFP package. Both options of the M32R/D are currently sampling and in volume production, with the 2-Mbyte and 1-Mbyte options selling for $25 and $20 each, respectively, in 10,000-unit quantities.
Mitsubishi Electronics America
1050 E. Arques Ave.
Sunnyvale, CA 94086
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