Ultra-low-power ARM Cortex-M3 32-bit microcontroller measures just 6mm x 6mm

Working with voltages down to just 1.7V and supplied in a 6mm x 6mm BGA package, the new TMPM395FWXBG is ideal for applications ranging from battery-powered and portable devices to home appliances and consumer electronics goods. The high efficiency ARM core operating at up to 20MHz and an optimised design ensure minimal power consumption during operation. A range of standby modes reduce currents to as little as 1µA (RTC mode) when processing is not required.

Toshiba’s new microcontroller simplifies applications with remote control functionality by incorporating a consumer electronics control (CEC) unit and a remote control signal pre-processor (RMC). For home appliance designs an integrated Oscillation Frequency Detector (OFD) facilitates hardware monitoring of the CPU clock to enable compliance with the requirements of safety standard IEC60730 (Class B).

The TMPM395FWXBG is supplied with 128Kbytes of Flash memory and 8Kbytes of RAM. On-board peripherals comprise a 10-bit, 12-channel ADC, a real time clock (RTC), 10-channel 16-bit timer and a watchdog timer (WDT). An internal high-speed 10MHz oscillator and voltage detector are also provided.

Connectivity includes a 3channel general purpose serial interface that can be configured for either UART or synchronous operation and a 2-channel serial bus interface that allows selection of I2C bus or synchronous mode. A 4-channel synchronous serial interface (SSP) offering a 3V-tolerant SPI mode is also provided. Despite its small size, the microcontroller provides 91 pins for input/output.

To help designers optimise power efficiency the TMPM395FWXBG features four standby modes – ‘idle’, ‘slow’, ‘sleep’, 'Back-up stop' - and three sub-clock (32.768kHz) operation modes of ‘slow’, 'sleep' and 'RTC'. In RTC mode current consumption is just 1µA.