Renesas R5F12018ASP#10

Overview

R5F12018ASP#10 from Renesas Electronics is an 8 KB flash, 1 KB RAM RL78/G15 10-pin LSSOP microcontroller operating at 2.4–5.5 V, featuring 4-channel 8/10-bit ADC, 8-channel 16-bit timer, UART, dual simplified I²C, and simplified SPI for embedded control in industrial temperature range (−40°C to +105°C).

For engineers reviewing the R5F12018ASP#10 datasheet, R5F12018ASP#10 pinout, R5F12018ASP#10 application, or R5F12018ASP#10 equivalent, key selection factors include its 10-pin LSSOP package with 4 analog inputs, integrated high-speed on-chip oscillator (±1.0% accuracy at −20°C to +85°C), STOP/HALT low-power modes, and support for tool-based debug via TOOLRxD/TOOLTxD pins.

Technical Context

The R5F12018ASP#10 implements the RL78 CPU core with CISC architecture, 3-stage pipeline, and 1 MB address space, enabling deterministic real-time execution with minimum instruction time of 0.0625 μs at 16 MHz. It integrates a selectable power-on-reset circuit with four voltage thresholds and supports both internal (1–16 MHz) and external (1–12 MHz crystal or 1–16 MHz EXCLK) clock sources.

Its peripheral set includes one UART channel, two simplified I²C channels, one simplified SPI (CSI) channel, one 12-bit interval timer, one watchdog timer, and BCD adjustment logic. The device uses a dedicated low-speed on-chip oscillator (15 kHz TYP.) for watchdog operation independent of main clock domain.

Key Specifications

Pinout & Package

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

Key Features

Applications

Equivalent & Alternatives

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

Compared with R5F12017ASP#10, the R5F12018ASP#10 provides double flash capacity for complex control algorithms without layout change; versus R5F12048GSP#10, it trades ADC channel count and crystal support for minimal 10-pin footprint and lower BOM cost in space-constrained industrial nodes.

Availability

R5F12018ASP#10 is available at Aetrix Electronics and suitable for industrial sensor nodes, smart appliance controllers, energy meter interfaces, and factory automation I/O modules requiring stable component supply across extended temperature ranges.

Supply support for R5F12018ASP#10 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 8/16-bit MCUs targeting resource-constrained industrial controls, sensor hubs, and white goods with integrated analog and communication peripherals.

FAQ

What is the maximum operating frequency and instruction timing of the R5F12018ASP#10?

The R5F12018ASP#10 supports a maximum high-speed on-chip oscillator frequency of 16 MHz, yielding a minimum instruction execution time of 0.0625 μs. Its RL78 CPU core uses a 3-stage pipeline and operates across a 2.4–5.5 V supply range. Frequency selection (1/2/4/8/16 MHz) is configured via option byte bits 0–2, and accuracy is ±1.0% over −20°C to +85°C for G-grade devices like the R5F12018ASP#10.

Does the R5F12018ASP#10 support crystal oscillator input, and if not, what are the clock options?

The R5F12018ASP#10 does not include X1/X2 crystal oscillator pins - those are only present on 16-pin and 20-pin RL78/G15 variants. It relies exclusively on its high-speed on-chip oscillator (1–16 MHz, ±1.0% accuracy) and low-speed on-chip oscillator (15 kHz). External clock input via EXCLK is also unavailable on the 10-pin LSSOP package. All timing-critical functions, including UART baud generation and ADC sampling, derive from the internal oscillator.

How many analog input channels does the R5F12018ASP#10 support, and what ADC resolution is available?

The R5F12018ASP#10 supports 4 analog input channels (ANI0–ANI3) with configurable 8-bit or 10-bit resolution. It includes an internal reference voltage of 0.815 V (TYP.) and supports external reference inputs. The ADC operates across the full 2.4–5.5 V supply range and is fully functional in STOP mode, enabling low-power wake-up on analog threshold events - a key capability for battery-operated sensor applications using the R5F12018ASP#10.

What debug interface does the R5F12018ASP#10 provide, and is an external debugger required?

The R5F12018ASP#10 integrates a full on-chip debug function accessible via three dedicated pins: TOOL0 (bidirectional), TOOLRxD (input), and TOOLTxD (output). This enables real-time debugging, flash programming, and breakpoint execution without external JTAG or SWD adapters. The interface supports standard Renesas E2 studio and CS+ IDEs. No external debugger hardware is required for development - the R5F12018ASP#10's built-in debug capability reduces prototyping cost and complexity.

What is the data flash endurance and rewrite unit size for the R5F12018ASP#10?

The R5F12018ASP#10 includes 1 KB of data flash memory rated for 1,000,000 write/erase cycles (TYP.). Rewrites occur in 32-bit units, and erasure must precede writing. Background operation (BGO) is not supported - the CPU cannot execute instructions from code flash while data flash is being rewritten. Voltage requirements for rewrites match the main supply: VDD = 2.4–5.5 V. This endurance and granularity make the R5F12018ASP#10 suitable for long-term parameter storage in industrial equipment.