Renesas R5F12018ASP#70

Overview

R5F12018ASP#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. It integrates an 8/10-bit ADC (4 channels), two simplified I²C interfaces, one UART, two CSI (SPI-compatible) channels, eight 16-bit timers, and a programmable buzzer/clock output - deployed in industrial sensor nodes and low-power control modules.

For engineers reviewing the R5F12018ASP#70 datasheet, R5F12018ASP#70 pinout, R5F12018ASP#70 application, or R5F12018ASP#70 equivalent, key selection criteria include its 10-pin LSSOP package, −40°C to +105°C industrial temperature grade (G), 16 MHz high-speed on-chip oscillator ±1.0% accuracy (−20°C to +85°C), and support for background-free data flash writes at full VDD range.

Technical Context

The R5F12018ASP#70 implements the RL78 CPU core with CISC architecture and 3-stage pipeline, enabling minimum instruction execution time of 0.0625 μs at 16 MHz. Its clock system combines selectable high-speed on-chip oscillator (1–16 MHz), low-speed 15 kHz on-chip oscillator, and optional external crystal (X1/X2, up to 12 MHz) or EXCLK input (up to 16 MHz).

Power management includes HALT and STOP modes, selectable power-on-reset (SPOR) with four voltage thresholds, and dedicated watchdog timer using the low-speed oscillator. Peripheral I/O redirection (PIOR) enables flexible pin function assignment without hardware changes.

Key Specifications

Pinout & Package

Package: 10-pin LSSOP (4.4 × 3.6 mm, 0.65-mm pitch), RoHS-compliant, industrial-grade (G: −40°C to +105°C).

Key Features

Applications

Equivalent & Alternatives

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

Compared with R5F12017ASP#70, the R5F12018ASP#70 offers double flash capacity for complex control algorithms without layout change; versus R5F12048ASP#70, it trades pin count and crystal support for minimal footprint and lower BOM cost in space-constrained applications.

Availability

R5F12018ASP#70 is available at Aetrix Electronics and suitable for industrial sensor nodes, smart thermostat controllers, and programmable power monitors requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for R5F12018ASP#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 applications.

The RL78/G15 product line delivers ultra-low-power, cost-optimized 16-bit MCUs targeting battery-operated sensors, appliance controls, and industrial edge devices - emphasizing flash efficiency, analog integration, and robust industrial qualification.

FAQ

What is the maximum operating frequency and accuracy of the on-chip oscillator in R5F12018ASP#70?

The R5F12018ASP#70 features a high-speed on-chip oscillator configurable from 1 MHz to 16 MHz. Its frequency accuracy is ±1.0% over −20°C to +85°C ambient, and ±1.5% across the full −40°C to +105°C industrial range. This eliminates need for external crystals in many timing-tolerant applications while maintaining reliable startup and clock stability.

Does R5F12018ASP#70 support in-system programming and data retention during power loss?

Yes, R5F12018ASP#70 supports full in-system programming via on-chip debug interface and self-programming of both code and data flash. Data flash endurance is rated at 1,000,000 write cycles with guaranteed data retention for 20 years at 85°C - enabling robust parameter storage and field firmware updates without external memory.

How many analog input channels and what ADC resolution does R5F12018ASP#70 provide?

R5F12018ASP#70 integrates an 8/10-bit successive approximation register (SAR) ADC with 4 analog input channels (ANI0–ANI3). It supports internal 0.815 V reference or VDD reference, operates across the full 2.4–5.5 V supply range, and delivers typical INL of ±1 LSB - sufficient for precision temperature, voltage, and current sensing in industrial environments.

Can R5F12018ASP#70 operate in STOP mode with wake-up from analog comparator events?

Yes, R5F12018ASP#70 supports wake-up from STOP mode using comparator output (VCOUT0) as an interrupt source (INTP4). The comparator can use internal or external reference voltage, and its output directly triggers CPU wake-up without requiring active polling - reducing average system power in always-on monitoring applications.

What serial communication interfaces are available on R5F12018ASP#70 and how are they allocated on the 10-pin LSSOP package?

R5F12018ASP#70 provides one UART (RxD0/TxD0 on P01/P00), two simplified I²C channels (IIC00 on P03/P04; IIC01 on P02/P03 via PIOR), and two CSI (SPI-compatible) channels (CSI00 on P01/P02/P03; CSI01 on P02/P03/P04). Pin multiplexing via PIOR allows dynamic allocation without hardware redesign.