company blog about Renesas R5F100SJAFB RL78/G13 Low Power High Function MCU For General Purpose Applications

Renesas R5F100SJAFB RL78/G13 Low Power High Function MCU For General Purpose Applications

Shenzhen Mingjiada Electronics Co., Ltd., as a globally renowned distributor of electronic components, consistently supplies the R5F100SJAFB RL78/G13 low-power, high-performance microcontroller. This microcontroller integrates a wealth of peripheral interfaces and functional modules, capable of meeting the demands of various complex application scenarios.

【Core Advantages of the R5F100SJAFB】

The R5F100SJAFB is a 16-bit microcontroller from Renesas Electronics, belonging to the RL78/G13 series. Employing advanced low-power process technology, it achieves industry-leading power consumption levels while maintaining high performance.

Operating at a maximum frequency of 32MHz with an RL78 core, it consumes as little as 66μA/MHz during CPU operation and just 230nA in STOP mode, perfectly balancing low power consumption with high processing performance.

The R5F100SJAFB features an ultra-wide operating voltage range (1.6V to 5.5V), accommodating diverse power supply environments, with an operating temperature range spanning -40°C to +85°C to meet industrial-grade application requirements.

Its integrated high-precision on-chip oscillator (accuracy ±1.0%) further reduces the need for external components and lowers system costs.

【RL78/G13 Series Overview and Product Positioning】

The RL78/G13 series, introduced by Renesas Electronics, is a 16-bit microcontroller range that combines advanced features from the 78K and R8C series, achieving an outstanding balance between low power consumption and high performance. These MCUs employ a CISC architecture with a 3-stage pipeline and an address space of up to 1MB, making them suitable for a wide range of applications from household appliances to industrial equipment.

As a member of this series, the R5F100SJAFB offers both low power consumption and high functional integration. Operating within a wide voltage range (1.6V to 5.5V), it achieves a core performance of up to 32MHz, delivering 43.2 DMIPS of computational capability. This balance of performance and power consumption makes it particularly suitable for battery-powered devices and applications requiring high efficiency.

【R5F100SJAFB Key Technical Specifications】

The R5F100SJAFB offers extensive memory resources and peripheral interfaces. Key specifications are as follows:

Memory Configuration: 256KB flash programme memory, 20KB RAM data memory, 8KB data flash (supporting up to 1 million erase/write cycles)

Package and I/O: 128-pin LFQFP package (14x20mm), providing up to 110 I/O ports

Analogue Peripherals: Integrated 26-channel 8/10-bit A/D converter

Communication Interfaces: Supports multiple protocols including CSI, I²C, LINbus, UART/USART

Timer Units: Includes PWM channels, watchdog timer, and real-time clock

Security Features: Built-in hardware security functions compliant with household appliance safety standards (IEC/UL 60730)

【R5F100SJAFB Core Features and Technical Advantages】

Ultra-low power technology

The R5F100SJAFB demonstrates exceptional power efficiency, with operating current as low as 66μA/MHz and standby current in STOP mode merely 230nA. This ultra-low power capability is achieved through multiple technologies:

Multi-mode power management: Supports HALT mode, STOP mode, and SNOOZE mode, enabling flexible switching based on task requirements

Wide operating voltage range: Single supply voltage from 1.6V to 5.5V, allowing stable operation even with low battery levels

Intelligent peripheral management: Data transfer in SNOOZE mode requires no CPU intervention, significantly reducing overall power consumption

Memory Architecture and Performance

The R5F100SJAFB incorporates 256KB of Flash program memory and 20KB of RAM, alongside 8KB of data Flash supporting up to one million erase/write cycles.

Its memory system uniquely supports Background Operation (BGO), enabling the CPU to continue executing instructions from program memory while data Flash is being rewritten, substantially enhancing CPU utilisation.

Extensive Peripherals and Interfaces

The R5F100SJAFB integrates multiple common peripherals, reducing external component requirements:

Analogue Peripherals: 26-channel 10-bit ADC with internal reference voltage (1.45V) and temperature sensor

Communication Interfaces: Supports CSI, I²C, LINbus, and UART/USART serial communications

Timer System: 8 x 16-bit timers, 12-bit interval timer, real-time clock (RTC), and watchdog timer

Security and Protection: On-chip power-on reset (POR) circuit and low-voltage detection (LVD) circuit, compliant with household appliance safety standard IEC/UL 60730

High-Precision Clock Source

The R5F100SJAFB incorporates a high-precision on-chip oscillator with selectable frequencies ranging from 1MHz to 32MHz, achieving accuracy up to ±1.0% (under conditions of VDD=1.8V to 5.5V and TA=-20°C to 85°C). This high-precision clock reduces the need for external crystal oscillators, thereby lowering system costs and space requirements.

【R5F100SJAFB Target Application Areas】

The R5F100SJAFB microcontroller demonstrates broad application potential across multiple sectors due to its low-power characteristics and extensive peripheral resources:

Home Appliances and Consumer Electronics

Compliant with IEC/UL 60730 household appliance safety standards, the R5F100SJAFB incorporates security features to detect unauthorised hardware manipulation. Combined with its low power consumption, it is ideally suited for appliances such as washing machines, air conditioners, and refrigerators.

Industrial Control and Automation

In industrial settings, the R5F100SJAFB can be deployed in PLCs, sensor controllers, motor drives, and similar applications. Its wide operating temperature range and robust interface support enable adaptation to demanding industrial environments.

Medical and Health Devices

The low-power characteristics make the R5F100SJAFB highly suitable for portable medical devices such as pulse oximeters and handheld monitors. Its extensive analogue peripherals enable direct sensor connectivity, simplifying system design.

Smart Meters and Energy Management

Within smart water, electricity, and gas meters, the R5F100SJAFB's low power consumption extends battery life, while its communication interfaces support various meter reading protocols.