Renesas R5F1214AASP#50

Overview

R5F1214AASP#50 from Renesas Electronics is a 16-pin RL78/G16 16-bit microcontroller with 16 KB code flash, 2 KB RAM, and integrated capacitive touch sensing (15-channel CTSU), designed for low-power consumer applications operating from −40°C to +85°C. It features an RL78 CPU core (3-stage pipeline), 8×16-bit timers, 10-bit A/D converter (11-channel), simplified SPI/I²C/UART interfaces, and real-time clock with calendar function.

For engineers reviewing the R5F1214AASP#50 datasheet, R5F1214AASP#50 pinout, R5F1214AASP#50 application, or R5F1214AASP#50 equivalent, key selection considerations include its LSSOP-16 package with 0.65-mm pitch, 16 KB flash memory size, A-grade temperature range, and support for touch-based HMI in space-constrained consumer devices.

Technical Context

The R5F1214AASP#50 implements the RL78 CPU core with CISC architecture and configurable instruction timing (0.0625 μs @ 16 MHz to 30.5 μs @ 32.768 kHz), enabling dynamic power/performance trade-offs. Its on-chip peripherals include a 10-bit A/D converter with internal reference voltage (0.815 V) and temperature sensor, plus a dedicated capacitive touch sensing unit supporting self- and mutual-capacitance modes.

Power management includes HALT and STOP modes, selectable on-chip power-on-reset (SPOR) with three reset levels, and operation from a single 2.4–5.5 V supply. Clock sources comprise a high-speed on-chip oscillator (1–16 MHz, ±1.0% accuracy at TA = −20 to +85°C) and subsystem clock (32.768 kHz).

Key Specifications

Pinout & Package

Package: 16-pin plastic SSOP (4.4 × 5.0 mm, 0.65-mm pitch), RoHS-compliant, moisture sensitivity level (MSL) 3.

Key Features

Applications

Equivalent & Alternatives

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

Compared with R5F1214CASP#50 and R5F1211AASP#50, the R5F1214AASP#50 delivers optimal balance of touch capability, memory size, and package density for mid-tier consumer HMI-enabling full touch UI implementation without over-provisioning flash or sacrificing I/O count.

Availability

R5F1214AASP#50 is available at Aetrix Electronics and suitable for home appliance control panels, portable medical device interfaces, smart remote controls, and industrial human-machine interfaces requiring stable component supply and long-term production continuity.

Supply support for R5F1214AASP#50 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 headquartered in Tokyo, Japan, specializing in microcontrollers, analog, power, and SoC solutions for automotive, industrial, and consumer markets.

The RL78/G16 product line delivers true low-power performance (61 µA/MHz at 125°C) with integrated capacitive touch sensing, targeting cost-sensitive, space-constrained consumer and industrial HMI applications.

FAQ

What is the maximum operating frequency and instruction timing of the R5F1214AASP#50?

The R5F1214AASP#50 supports a maximum operating frequency of 16 MHz using its high-speed on-chip oscillator. Its minimum instruction execution time is 0.0625 μs at this frequency. The RL78 CPU core allows dynamic switching to ultra-low-speed operation at 32.768 kHz, extending minimum instruction time to 30.5 μs-enabling fine-grained power/performance optimization in the R5F1214AASP#50.

Does the R5F1214AASP#50 support background data flash rewriting while executing code from main flash?

No, the R5F1214AASP#50 does not support background operation (BGO) for data flash rewriting. During data flash write operations, instruction execution from code flash memory is halted. This behavior is explicitly documented in the R5F1214AASP#50 datasheet and requires firmware to manage critical sections carefully to avoid system lockup during updates.

What touch sensing capabilities does the R5F1214AASP#50 provide, and how many keys can it support?

The R5F1214AASP#50 integrates a 15-channel capacitive touch sensing unit (CTSU). In self-capacitance mode, it supports up to 15 independent touch keys using one pin per key. In mutual-capacitance mode, it supports up to 16 keys using a matrix configuration with transmit/receive pin selection from the same 15 pins-making the R5F1214AASP#50 ideal for compact touch interfaces without external controllers.

What are the supported serial communication interfaces on the R5F1214AASP#50?

The R5F1214AASP#50 supports up to three simplified SPI (CSI) channels, three UART channels, three simplified I²C (RIIC) channels, and one full I²C (IICA) channel. These interfaces are multiplexed across GPIO pins and configured via peripheral I/O redirection registers (PIOR), allowing flexible routing without hardware changes-critical for adapting the R5F1214AASP#50 to varying system interconnect requirements.

Is the R5F1214AASP#50 pin-compatible with other RL78/G16 variants in the same package?

Yes, the R5F1214AASP#50 is pin-compatible with other 16-pin RL78/G16 devices in SSOP packaging-including R5F1214CASP#50 (32 KB flash), R5F1214AGSP#50 (G-grade), and R5F1214AMSP#50 (M-grade). All share identical pin functions, electrical characteristics, and mechanical dimensions, enabling drop-in replacement for memory, temperature grade, or application-specific variants of the R5F1214AASP#50.