Low pin-count MCUs control multiple motors

October 06, 2016 // By Julien Happich
Toshiba Electronics Europe has developed a new range of microcontrollers that allow a single-chip, with a low pin-count (32 to 64 pins), to control multiple motors. Until now, driving two motors typically required an MCU in a 100-pin type package.

Toshiba’s 64-pin TXZ family products, however, can control two motors thanks to their ability to detect motor position via an integrated, high-speed AD converter with a 0.5μs conversion speed.

The new devices are based on the ARM Cortex-M4F operating at up to 80MHz and incorporating a floating point processing unit. As well as the high-precision ADC, the devices feature high-speed Flash memory with 80MHz operation, a co-processor for Toshiba’s original vector engine, and 3-channel op-amps with selectable gain. Together, they ensure the new products realise efficient motor control while improving the power factor and system control. Devices in the TXZ family support the RAMScope interface, which can confirm parameters in real time without stopping motors by loading parameters relevant to motor control to RAM. A self-diagnostic function that confirms the reference voltage of the ADC, and a CRC arithmetic circuit that identifies incorrect detection for every read operation of the memory are also incorporated.

Offering pin counts from 32 pins to 64 pins, the new devices are available with flash memory capacities from 64KB to 128KB. Communication options comprise UART, TSPI and I2C interfaces, while I/O ports range from 24 to 52. Operating voltage range is from 4.5V to 5.5V.

Toshiba Electronics Europe at www.toshiba.semicon-storage.com