Low power 8pin microcontroller aims at power designs

New Products |
By Nick Flaherty

Renesas Electronics has launched a general-purpose low power 16bit microcontroller (MCU) family in a small 8bit package for compact power designs in all kinds of equipment.

The RL78/G15 includes a wide range of peripherals and 4 to 8KB of code flash memory in package sizes ranging from 8 to 20 pins, with the smallest 8-pin device measuring only 3 x 3 mm.  These features are designed to keep system size small and reduce the cost of end systems, such as industrial, consumer, sensor control, lighting, and inverter applications.

The maximum operating ambient temperature of 125°C also eases the thermal design, covering a wide temperature range and allowing the MCU to be used near heat-generating components such as inverter motors.

Renesas has used the RL78/G15 in a 100W USB Power Delivery (PD) Adaptor with Multi-Output solution that can power a variety of systems. The power supply design includes a high-performance PFC (Power Factor Correction) controller, an AC/DC controller, and a high-performance DC-DC buck device.

A 100W power adaptor design with boost power factor correction (PFC), quasi-resonant (QR) flyback controller power, DC/DC buck, USB power delivery (PD) controller, and RL78 16bit microcontroller

 “The RL78 family is known for its excellent power efficiency and optimized peripheral functions,” said Toshihiko Seki, Vice President of Renesas’ MCU Device Solution Business Division. “To date, we have shipped over 7.1 billion units in the 11 years since its release, and we are currently shipping 100 million units per month. Renesas will continue to expand cost-effective and easy-to-use 8-bit and 16-bit MCUs that support customers’ requirements.”

“We welcome the expansion of Renesas’ RL78 family offerings to the extensive low-end MCU market,” said Lotta Frimanson, Director of Product Management at IAR Systems. “As the only partner supporting the entire RL78 family of MCUs, IAR is committed to providing high-class development solutions that allow engineers worldwide to make the most out of the RL78 MCU’s capabilities and generate fast and compact code for efficient development.”

The RL78 16bit CPU core operates at 16MHz and is all the pins can be used for general-purpose I/O, except for the VDD and VSS power supply pins which support 2.4V to 5.5V. It includes up to 8 KB of code flash memory, 1 KB of data flash, and 1 KB of SRAM as well as CSI, UART, Simple I2C, and multi-master I2C serial interfaces, high-precision oscillator (±1.0%) and built-in comparator.

Development Environment

Engineers designing with the new RL78/G15 can use the GUI-based Smart Configurator to easily generate driver code for peripheral functions. Renesas also offers the Fast Prototyping Board (FPB) for evaluation, which comes with Arduino Uno and Pmod Type 6A interfaces with access to all pins. In addition, debugging and programming are possible using only a USB cable.

Using an Arduino library that can run on the FPB, developers can gain access to development resources of the RL78 as well as the vast resources offered through the Arduino ecosystem, so that they can quickly turn their ideas into a working solution.

The RL78/G15 is available today in volume production.


Linked Articles