MCUs take on motors and more

A Toshiba Electronics Europe product story

Edited by the Electronicstalk editorial team May 21, 2004

A new family of 32bit single-chip RISC MCUs offer simultaneous vector motor control of inverter motors and application control for air conditioner, washing machine and refrigerator applications.

Toshiba has developed a new 32bit single-chip MIPS-based reduced instruction set computer (RISC) microcontroller (MCU) family.

The new TX19A70 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 scheduled to be available in June 2004.

ROM code acceptance for the mask ROM versions, TMP19A70CYFG and TMP19A70CYUG, is scheduled to start in July 2004.

Energy conservation is fundamental 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.

Correspondingly, there is increasing need for a microcontroller that provides the right combination of vector drive, application control, pulse-width modulation (PWM) output, high-speed processing and high-speed A/D conversion.

Toshiba designed the new TX19A70 family to meet this market need, and the devices join the company's growing product portfolio targeted at the home appliance segment.

Based on the MIPS R3000A architecture of MIPS Technologies, the new family features a newly developed, high-performance 32bit RISC TX19A core and includes both the 32bit MIPS32 instruction-set architecture (ISA) for speed and the MIPS16e application-specific extensions (ASE), an instruction set with high-code-efficiency that contains instructions added by Toshiba.

Most instructions can be executed in a single cycle of 17.8ns.

Each execution unit (32bit ALU, 32bit MAC, 32bit shifter) can execute an instruction in a single cycle.

For three-phase PWM output, the MCUs have a 16bit width with a minimum time unit of 35.6ns, a dead timer, and an emergency shutdown protection function.

The built-in analogue-to-digital (A/D) convertor uses sequential conversion and can perform 2.36us conversion with 10bit resolution.

In addition, these devices incorporate a variety of automatic conversion start functions that are synchronous to the PWM.