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TOSHIBA UNVEILS 32-BIT SINGLE-CHIP MIPS BASED RISC MCU.

Toshiba America Electronic Components, Inc. (TAEC) has unveiled a new 32-bit single-chip MIPS-based reduced instruction set computer (RISC) microcontroller (MCU) family. Designated TX19A70, the new devices provide simultaneous vector motor control of inverter motors and application control for air conditioner, washing machine and refrigerator applications. Samples of the flash memory versions, TMP19A70FYFG and TMP19A70FYUG, are now available. ROM code acceptance for the mask ROM versions, TMP19A70CYFG and TMP19A70CYUG, is scheduled to start in July 2004.

"Energy conservation is increasingly important in the home electric appliances industry and an increasing number of products use high-efficiency vector control to drive air conditioner compressors, washing machines and refrigerators," said Don Schneider, business development manager of the ASSP Business Unit at TAEC. "Correspondingly, there is increasing need for a microcontroller that provides the right combination of vector drive, application control, high-speed processing and high-speed analog-to-digital (A/D) conversion. Toshiba designed the new TX19A70 family to meet this market need; it joins the company's growing product portfolio targeted at the home appliance segment." He noted that a major Japanese company has already designed the device into an air conditioner.

Based on the MIPS R3000A architecture of MIPS Technologies, Inc., the new family features a newly developed, high-performance 32-bit RISC TX19A core and includes both the 32-bit MIPS32 instruction-set architecture (ISA) for speed and the MIPS16e Application-Specific Extensions (ASE), an instruction set with high-code-efficiency which contains instructions added by Toshiba. Most instructions can be executed in a single cycle of 17.8 nanoseconds (ns.) Each execution unit (32-bit ALU, 3 2-bit MAC, 32-bit Shift) can execute an instruction in a single cycle. For three-phase PWM output, the MCUs have a 16-bit width with a minimum time unit of 35.7ns, a dead timer, and an emergency shutdown protection function. The built-in A/D converter uses sequential conversion and can perform 2.36 microsecond conversion with 10-bit resolution. Also, these devices incorporate a variety of automatic conversion start functions that are synchronous to the PWM.

Key Features

Key features of the MCUs are as follows:

* Feature a newly developed high-performance 32-bit RISC TX19A core. The instruction set includes as subsets the 32-bit instructions of the MIPS32 ISA for high-performance and the MIPS16e ASE for high-code-density. High-speed memory and 5-stage pipelines enable the execution of most instructions in a single cycle of 17.8ns.

* By multiplying the frequency of an external 7MHz oscillator by a factor of 8 (56 MHz), 1-cycle instructions can be executed in 7.8ns.

* Can select a 32-bit or 16-bit fixed length for instructions depending on the mode. Can switch to a 32-bit length when fast operation is required or to a 16-bit length when code efficiency is desired.

* Incorporates the three following independent execution units. Saving the execution results is not necessary. Also, all operations are executed in a single cycle. - 32-bit arithmetic operation, logic operation (ALU) - 32-bit multiply accumulation operation (MAC): 32x32 + 32 = 64 bits - 32-bit shifter: 32 bits --> 32 bits

* Features a built-in 2-channel, 3-phase PWM output with a dead timer for motor control. Has a 16-bit up/down counter and can generate a PWM carrier frequency with a minimum resolution of 35.7ns. Also, EMG signal input makes emergency output shutdown possible.

* Employs two 10-bit sequential conversion type A/D converters to achieve a conversion time of 2.36 microseconds. The A/D converters can synchronize with the PWM or a timer and can start A/D conversion at any location in the PWM output.

* Incorporates a 1-channel encoder counter that enables easy detection of the motor position by using an encoder.

Pricing and Availability

Samples of the flash memory versions, TMP19A70FYFG and TMP19A70FYUG, are now available; sample pricing is $18.15 each in 100-piece quantities. ROM code acceptance for the mask ROM versions, TMP19A70CYFG and TMP 19A70CYUG, is scheduled to start in July 2004; contact TAEC for pricing. Volume production of the four-product family is slated to start in August 2004.

Technical Specification Summary

Part Number -TMP19A70FYFG (Flash Memory Type) -TMP19A70FYUG (Flash Memory Type) -TMP19A70CYFG (Mask ROM Type) -TMP19A70CYUG (Mask ROM Type)

Core -32-bit RISC TX19A core -Operating Frequency: 56MHz -Instruction Run Time: 17.8ns

Built-in Memory -TMP19A70FYFG/ TMP19A70FYUG: Flash Memory: 256Kbyte -TMP19A70CYFG/ TMP19A70CYUG: Mask ROM: 256Kbyte -RAM: 10Kbyte

3-Phase PWM -Channel Count: 2

Output -Resolution: 35.7ns (16-bit) -Dead Time: 0-18.25 microseconds -Protection Function: Emergency stop

Timer - Timer Event Counter: 4 channels - Incremental Encoder Input: 1 channel

Communications -UART/SIO switching: 1 channel -UART: 2 channels

A/D Converter -Channel Count: 8 + 11 channels (2 units) -Input Voltage: 0-3.3 V -Conversion Time: 2.36 microseconds/channel -Resolution: 10-bit -Others: Start conversion in synch with PWM cycle or timer

General-purpose I/O -75-pin input/output ports -Tri-state type input/output -Software drive switching and pull-up possible

Power Supply -Power Supply Voltage: 1.5/3.3V -Temperature Range: -40 degrees to 85 degrees C

Package -TMP19A70FYFG P-QFP 100-pin, 14mm x 20mm, 0.65-mm pitch -TMP19A70FYUG P-LQFP100-pin, 14mm x 14mm, 0.5-mm pitch -TMP19A70CYFG P-QFP 100-pin, 14mm x 20mm, 0.65-mm pitch -TMP19A70CYUG P-LQFP100-pin, 14mm x 14mm, 0.5-mm pitch

About TAEC

TAEC is a provider of next-generation technologies. This broad offering includes semiconductors, flash memory-based storage solutions, optical communication devices, displays and rechargeable batteries for the computing, wireless, networking, automotive and digital consumer markets.

TAEC is an independent operating company owned by Toshiba America, Inc., a subsidiary of Toshiba Corporation, the fifth largest semiconductor company worldwide in terms of global sales for the year 2003 according to Gartner/Dataquest's Worldwide Semiconductor Market Share Ranking. Toshiba is a provider of high-technology products with more than 300 major subsidiaries and affiliates worldwide. For additional company and product information, visit TAEC's website at http://www.chips.toshiba.com.

Toshiba America Electronic Components can be found on the World Wide Web at http://www.toshiba.com/taec.

For more information, call 408/526-2454.
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Publication:Electro Manufacturing
Geographic Code:1USA
Date:Jun 1, 2004
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