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NEC rolls MCU for real-time processing

Posted: 21 Nov 2002 ?? ?Print Version ?Bookmark and Share

Keywords:nec electronics? v850/me2? risc microcontroller?

The V850E/ME2 32-bit RISC microcontroller is capable of executing 195MIPS at 150MHz and is suitable for integration into consumer products that require real-time processing such as printers, navigational equipment, game consoles, and digital A/V products.

Manufactured using the company's advanced 0.13?m CMOS process technology, the MCU incorporates an instruction cache and two on-chip 64KB blocks for high-speed data processing. The RAM blocks can fetch instructions in a single clock and also can be used to perform different processing functions while simultaneously-fetching programs and enabling the instruction RAM to be used as an overlay-type program memory.

A separate 8KB, two-way set-associative instruction cache allows high-speed execution of application software from external memory, while a 16KB high-speed data RAM promotes faster stack and work memory operations.

In addition to SRAM and ROM interfaces, the V850E/ME2 microcontroller provides a range of memory controllers, enabling the direct connection of memory devices such as SDRAM and page ROM. A bus sizing function provides additional flexibility to the designer by allowing the external bus interface to be configured by 8-, 16-, or 32-bit widths.

The MCU also features peripheral functions including USB 1.1, timers, three serial interfaces, a 10-bit ADC, and a four-channel DMA controller. It also has an on-chip spread-spectrum clock generation function that reduces the peak value of EMI noise by >10dB.

Operating at 3.3V, the V850E/ME2 chip consumes only 200mW at 150MHz. It is packaged in a 24-by-24mm 176-pin LQFP and is priced at $14.20 each in 10,000-unit quantities. A 100MHz and 133MHz version is also available, priced at $12.50 and $13.30, respectively.

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