Renesas R5F12018MSP#30

Overview

R5F12018MSP#30 from Renesas Electronics is an RL78/G15 10-pin LSSOP microcontroller with 8 KB code flash, 1 KB RAM, and 1 KB data flash, operating from 2.4 V to 5.5 V across −40°C to +125°C industrial temperature range. It integrates an 8/10-bit 4-channel ADC, 8-channel 16-bit timer array, UART, two simplified SPI (CSI) channels, two simplified I²C channels, and a programmable clock/buzzer output - deployed in motor control subsystems for HVAC actuators.

For engineers reviewing the R5F12018MSP#30 datasheet, R5F12018MSP#30 pinout, R5F12018MSP#30 application, or R5F12018MSP#30 equivalent, key selection criteria include its 10-pin LSSOP package with 0.65-mm pitch, high-speed on-chip oscillator accuracy of ±1.0% (−20°C to +85°C), 54-µA/MHz active current at TA = 125°C, and support for HALT/STOP low-power modes in safety-critical embedded control.

Technical Context

The R5F12018MSP#30 implements the RL78-S2 CPU core with CISC architecture and 3-stage pipeline, enabling minimum instruction execution time of 0.0625 µs at 16 MHz using the high-speed on-chip oscillator. Its memory map spans 1 MB address space with four banks of (8-bit × 8) general-purpose registers.

Power management includes selectable power-on-reset (SPOR) with four detection voltage thresholds (2.25 V to 4.45 V), dedicated low-speed on-chip oscillator (15 kHz) for watchdog operation, and HALT/STOP modes that reduce current consumption while preserving register and RAM contents - critical for battery-backed industrial sensor nodes.

Key Specifications

Pinout & Package

Package: 10-pin plastic LSSOP (4.4 × 3.6 mm, 0.65-mm pitch), tray packaging (#30 specification).

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar microcontroller applications.

Compared with R5F12017MSP#30, the R5F12018MSP#30 provides double code flash capacity without changing PCB layout or power design; versus RL78/G14 R5F104G8ASM#30, it trades pin count and peripheral headroom for lower cost and smaller footprint in space-constrained industrial controls.

Availability

R5F12018MSP#30 is available at Aetrix Electronics and suitable for HVAC actuator control, industrial sensor telemetry, and smart power outlet designs requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for R5F12018MSP#30 includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

Renesas Electronics Corporation is a global semiconductor leader specializing in microcontrollers, analog, and power solutions for industrial, automotive, and IoT markets.

The RL78/G15 product line delivers ultra-low-power 16-bit MCUs optimized for cost-sensitive, thermally demanding embedded control applications - emphasizing minimal external components, integrated analog peripherals, and robust industrial qualification.

FAQ

What is the maximum operating frequency and oscillator accuracy of the R5F12018MSP#30?

The R5F12018MSP#30 supports a maximum high-speed on-chip oscillator frequency of 16 MHz with ±1.0% accuracy over −20°C to +85°C ambient temperature. At full industrial grade (−40°C to +125°C), accuracy degrades to ±1.5% above +85°C. External crystal oscillation up to 12 MHz is also supported via X1/X2 pins, but the R5F12018MSP#30 does not require external timing components for basic operation due to its calibrated internal oscillator.

Does the R5F12018MSP#30 support in-system programming and data retention during power loss?

Yes, the R5F12018MSP#30 supports in-system programming of both code and data flash memory without removing the device from the target board. Data flash offers 1,000,000 write/erase cycles with guaranteed data retention for 20 years at 85°C. The device includes a selectable power-on-reset (SPOR) circuit with four voltage thresholds (2.25 V to 4.45 V) to ensure reliable initialization during brown-out conditions - critical for maintaining state integrity in R5F12018MSP#30-based power monitoring systems.

How many analog input channels and comparator units does the R5F12018MSP#30 provide?

The R5F12018MSP#30 integrates an 8/10-bit successive approximation register (SAR) ADC with four analog input channels (ANI0–ANI3) and one comparator unit (IVCMP0) with selectable internal (0.815 V) or external reference voltage. While the full RL78/G15 family supports up to two comparators in 20-pin variants, the 10-pin R5F12018MSP#30 implements only one - sufficient for overvoltage detection or threshold-based actuation in compact industrial controllers.

What low-power modes are available on the R5F12018MSP#30 and how do they affect peripheral operation?

The R5F12018MSP#30 offers HALT mode (CPU halted, all peripherals fully operational) and STOP mode (all clocks stopped except low-speed 15 kHz watchdog oscillator). In HALT mode, UART, timers, and ADC remain active for background tasks; in STOP mode, only the watchdog and external interrupts (INTP0–INTP7) can wake the device. Both modes maintain full RAM and register contents - essential for rapid resumption in R5F12018MSP#30-based battery-powered sensor nodes.

Can the R5F12018MSP#30 be used as a UART-to-I²C bridge in a system with mixed communication protocols?

Yes, the R5F12018MSP#30 supports concurrent UART (1 channel), simplified I²C (2 channels), and simplified SPI (2 channels) interfaces - enabling protocol translation firmware. For example, host commands received via UART can be parsed and forwarded as I²C writes to connected sensors, with responses routed back through UART. Its 8 KB flash accommodates such bridging logic, and the peripheral I/O redirection register (PIOR) allows dynamic pin assignment to avoid conflicts - making R5F12018MSP#30 well-suited for heterogeneous industrial subsystem integration.