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Microcontroller meets home appliance needs

A Toshiba Electronics Europe product story
Edited by the Engineeringtalk editorial team Nov 8, 2004

Toshiba Electronics Europe has announced a flash microcontroller that is designed to meet the needs of modern home appliance applications including washing machines, dryers, and dishwashers.

Toshiba Electronics Europe has announced a flash microcontroller that is designed to meet the needs of modern home appliance applications including washing machines, dryers, and dishwashers.

The TMP86FS49 microcontroller is Toshiba's first device to incorporate Silicon Storage Technologies' (SST) Superflash memory, and combines focused peripherals for domestic appliance front panel applications with an eight-bit core for cost-effective implementation.

Toshiba's new home appliance microcontroller is based on the company's TLCS-870/C 16MHz 8-bit CPU core.

The core features 731 basic instructions and supports power conservation through a dual clock feature that allows the device to operate at 32.768kHz.

The core has been combined with 60Kbytes of Superflash low-cost, highly reliable flash memory, 2Kbytes of RAM, and a level of peripheral and interface capability that would not typically be found in a low-cost 64-pin device.

As a result, home appliance designers can use the microcontroller to implement key functions without the need for external components or additional circuit layout.

In addition to standard eight-bit, 16-bit, and watchdog timers, on-board peripherals include a 16-bit timer and counter capable of PWM output and a high-resolution 16-channel 10-bit successive approximation type ADC.

The ADC can be used to process a variety of front panel and system analogue inputs.

Five serial interfaces offer UART, HSIO, and I2C connectivity, while giving the designer the flexibility to implement parallel communications as necessary.

Superflash implementation can be programmed much faster than many alternative flash technologies, allowing designers to program the microcontroller's on-board 60Kbytes in less than five seconds.

As well as offering enough memory to, in most cases, eliminate the need for external memory, the on-board flash provides a high level of pre- and post-production flexibility.

That flexibility comes from the availability of three distinct programming modes, namely parallel mode, serial PROM mode, and ISP (in system programming) mode.

The latter allows upgrades and fixes in the field under control of the user program, removing the need to switch off the output to an LCD panel or active output controls.

The TMP86FS49 is supplied in a P-QFP64 package.

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