Renesas R5F12018GSP#70

Overview

R5F12018GSP#70 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 to 5.5 V across −40°C to +105°C industrial temperature range. It integrates an 8/10-bit ADC (4 channels), 8-channel 16-bit timer, UART, two simplified SPI (CSI) channels, two simplified I²C channels, and a watchdog timer - deployed in smart sensors and industrial control nodes requiring low-power operation and on-chip debug.

For engineers reviewing the R5F12018GSP#70 datasheet, R5F12018GSP#70 pinout, R5F12018GSP#70 application, or R5F12018GSP#70 equivalent, key selection criteria include its 10-pin LSSOP package, G-grade industrial temp rating, 8 KB flash capacity, high-speed on-chip oscillator accuracy (±1.0% at −20°C to +85°C), and integrated analog peripherals for sensor signal conditioning and local decision-making.

Technical Context

The R5F12018GSP#70 implements the RL78 CPU core with CISC architecture and 3-stage pipeline, supporting 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 general-purpose registers.

It features dual clock domains: a selectable high-speed on-chip oscillator (1–16 MHz) with ±1.0% accuracy over −20°C to +85°C, and a dedicated 15 kHz low-speed on-chip oscillator for watchdog and interval timing. Power management includes HALT and STOP modes, and a selectable power-on-reset circuit with four voltage thresholds (2.25 V to 4.45 V).

Key Specifications

Pinout & Package

Package: 10-pin LSSOP (4.4 × 3.6 mm, 0.65-mm pitch), lead-free, RoHS-compliant.

Key Features

Applications

Equivalent & Alternatives

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

Compared with R5F12017GSP#70, the R5F12018GSP#70 offers double flash capacity for complex control algorithms; compared with R5F12048GSP#70, it trades pin count and crystal support for compactness and lower BOM cost in space-constrained industrial nodes.

Availability

R5F12018GSP#70 is available at Aetrix Electronics and suitable for industrial sensor nodes, programmable relays, smart thermostats, and motor starters requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for R5F12018GSP#70 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 delivering trusted embedded solutions for automotive, industrial, infrastructure, and IoT markets.

The RL78/G15 product line delivers ultra-low-power, cost-optimized MCUs targeting industrial control, sensor hubs, and appliance subsystems where small footprint, robust operation, and integrated analog peripherals are critical.

FAQ

What is the maximum operating frequency of the R5F12018GSP#70 high-speed on-chip oscillator?

The R5F12018GSP#70 high-speed on-chip oscillator supports frequencies up to 16 MHz. Its accuracy is ±1.0% over the industrial temperature range of −20°C to +85°C at VDD = 2.4–5.5 V. Frequency selection (1/2/4/8/16 MHz) is controlled by option byte bits 0–2, and the oscillator is fully functional without external components.

Does the R5F12018GSP#70 support background data flash rewriting while executing code from main flash?

No, the R5F12018GSP#70 does not support background operation (BGO) for data flash. During data flash rewriting, instruction execution from code flash memory is halted. This behavior is explicitly documented in the datasheet: "Background operation (BGO) is not supported (instructions cannot be executed from the code flash memory while rewriting the data flash memory)."

How many analog input channels does the R5F12018GSP#70 ADC support, and what reference voltages are available?

The R5F12018GSP#70 integrates an 8/10-bit resolution ADC with 4 analog input channels (ANI0–ANI3). It supports both external reference voltage and internal reference voltage (0.815 V typical) via IVREF0. The ADC operates across the full VDD range of 2.4–5.5 V, enabling direct sensing of unregulated battery or rail voltages.

What debug interface does the R5F12018GSP#70 provide, and which pins are used?

The R5F12018GSP#70 provides an on-chip debug interface using three dedicated pins: TOOL0 (P40), TOOLRxD (P01), and TOOLTxD (P00). These pins support full debugging functionality including breakpoint setting, register inspection, and flash programming - eliminating the need for external debug adapters during development and validation.

Is the R5F12018GSP#70 pin-compatible with other RL78/G15 variants in the same package?

Yes, the R5F12018GSP#70 shares identical pinout and package (10-pin LSSOP) with all other RL78/G15 10-pin variants, including R5F12017GSP#70 and R5F12018ASP#70. Pin functions are consistent across these parts; only flash size (4 KB vs. 8 KB) and temperature grade (A vs. G) differ - enabling drop-in replacement for firmware upgrades or qualification changes.