Renesas Electronics expanded its low-power RL78 family with the introduction of the new 16-bit RL78/L23 microcontroller (MCU) group. The RL78/L23 MCUs, which operate at 32MHz, supports smart home appliances, consumer electronics, the Internet of Things, and metering systems by combining industry-leading low-power performance with crucial capabilities like dual-bank flash memory, segment LCD control, and capacitive touch functionality.
The performance and power needs of contemporary display-based human-machine interface (HMI) applications are met by these compact, cost-effective devices.
Ultra-Low Power Operation with Optimized LCD Performance
The RL78/L23 is perfect for battery-powered systems that are primarily in standby mode because of its ultra-low power consumption optimization. They have a quick 1?s wake-up time to help reduce CPU activity, an active current of only 109?A/MHz, and a standby current as low as 0.365?A.
Compared to the present RL78/L1X group, the LCD controller’s new reference mode, VL4, lowers LCD operating current by about 30%.
SMS (SNOOZE Mode Sequencer), which is included with the MCUs, allows dynamic LCD segment display without the need for CPU involvement.
Through task delegation to the SMS, the devices reduce CPU wake-ups and help save power at the system level. These developments minimize their negative effects on the environment while greatly extending battery life, streamlining design, and lowering replacement prices.
With a broad operating voltage range of 1.6V to 5.5V, the RL78/L23 can be operated directly from 5V power supply, which are frequently found in industrial and household products. External voltage regulators are not as necessary because to this capacity.
The MCUs also incorporate essential parts like an internal oscillator, a temperature sensor, and capacitive touch sensing, which lowers PCB size and BOM costs.
Feature-Rich Peripherals for HMI Systems
Built to meet the ever-changing needs of the HMI market, the RL78/L23 combines a number of cutting-edge capabilities into a small, reasonably priced device. Its capacitive touch and integrated segment LCD controller enable slick, responsive user interfaces for devices like HVAC systems and induction cooktops.
Rice cookers and IH cooktops are examples of smart kitchen appliances that require accurate multi-channel heat regulation, which is made possible by the IH timer (Timer KB40).
In applications like metering, where downtime must be kept to a minimum, the devices’ dual-bank flash memory enables smooth firmware updates via FOTA (Firmware Over-the-Air), enabling continuous system operation.
One memory bank can run the user software while the other receives updates thanks to the dual-bank architecture.
This method improves reliability by maintaining system functionality during the procedure.
Key Features of the RL78/L23
32MHz-operating 16-bit RL78 microcontroller Inbuilt capacitive touch and segment LCD controller Dual-bank flash memory up to 512KB for smooth FOTA Up to 8KB of data flash and 32KB of SRAM SMS for extremely low power usage IH Timer (KB40) enabling induction heating control with up to three channels wide range of operating voltages, 1.6V to 5.5V Temperature range for operation: -40°C to +105°C UART, I2C, CSIIEC60730-compliant self-test library44-100-pin LFQFP, LQFP, and HWQFN packages are among the multiple serial interfaces.
Intuitive Development Environment for Faster Time-to-Market
The development environment for the RL78/L23 is user-friendly. To simplify system design, developers can use powerful support tools like QE for Capacitive Touch and Smart Configurator. For thorough testing and validation, Renesas provides the RL78/L23 Fast Prototyping Board, which is compatible with the Arduino IDE, along with a capacitive touch assessment system.
Winning Combinations
Renesas offers Induction Heating Rice Cooker Solution which combines the new RL78/L23 devices with numerous compatible devices from its portfolio to offer a wide array of Winning Combinations.
Winning Combinations are technically vetted system architectures from mutually compatible devices that work together seamlessly to bring an optimized, low-risk design for faster time to market.
Renesas offers more than 400 Winning Combinations with a wide range of products from the Renesas portfolio to enable customers to speed up the design process and bring their products to market more quickly. They can be found at renesas.com/win.
Leadership Comments
“The Renesas RL78 Family of 16-bit microcontrollers has been one of the most successful products since its launch more than 10 years ago, particularly in home appliances,” said Daryl Khoo, Vice President of Embedded Processing at Renesas. “I’m pleased to announce the RL78/L23, a new generation of RL78 microcontrollers with rich features, ideally suited for smart home appliances and cost-sensitive IoT solutions. With these devices, we aim to provide a better user experience with our intuitive development environment so that customers can get to production faster with confidence, based on market-proven Renesas technologies.”
Availability
The RL78/L23 MCUs are available today, along with the Fast Prototyping Board (FPB-RL78L23) and the capacitive touch evaluation system (RSSK-RL78L23).
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