New Renesas MCUs target the Internet of Things with optimized memory options and true low power

Renesas Electronics Corporation has expanded its RX100 Series of microcontrollers with the new RX111 MCUs, designed to reduce design complexities for developers of building automation, portable healthcare, smart grid, wearables, and other emerging applications for the Internet of Things (IoT).

As the industry's first entry-level 32-bit MCU to offer True Low Power, USB 2.0 connectivity, digital signal processing (DSP) capability, and multiple on-chip safety features, the RX111 group provides strong support for a variety of systems, particularly for the healthcare and building automation segments. With increased memory capacity, ranging from 256KB to 512KB of Flash Memory and up to 64KB of on-chip RAM, the new RX111 devices extend the high performance and ultra-low power that the RX100 Series of MCUs is known to deliver.

Renesas True Low Power technology delivers flexible power management and optimum power consumption for all use cases. The expanded RX111 group maintains the same low power features of the existing RX111 devices, with three different run modes, three low-power modes, and a flexible clock system. For instance, the Low Power Fast Wakeup capability enables the new MCUs to operate at 100µA/MHz in Run Mode and 430nA in software standby from which it can wake up in only 4.8µs. It integrates a Zero Wait State Flash with Erase/Write as low as 1.8V, 1KB erase block size and background operation (BGO), and offers erase times as low as 10ms per block.

The RX111 devices support multiple communications peripherals, including USB 2.0 host with battery charging, device and OTG, and the I2C, and SPI (serial peripheral interface) protocols. Analog functions include a 12-bit ADC (analog-to-digital converter) with internal voltage reference, an 8-bit DAC (digital-to-analog converter) and a temperature sensor. All RX100 devices feature 32MHz operating speeds and 1.56 Dhrystone MIPS (DMIPS)/MHz throughput, with power consumption as low as 64 µA/DMIPS.

Samples of the new RX111 MCUs are available now. Mass production is scheduled to begin in December 2014.

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