Renesas R5F1211AASP#30

Overview

R5F1211AASP#30 from Renesas Electronics is a 10-pin, 16 KB flash, 2 KB RAM RL78/G16 16-bit microcontroller with integrated capacitive touch sensing (15-channel CTSU), 8/10-bit ADC (4-channel), dual comparators, real-time clock with calendar, and low-power STOP/HALT modes. It operates from 2.4–5.5 V and supports consumer-grade temperature range (−40 to +85°C), targeting compact human-machine interface applications such as appliance control panels and smart home sensors.

For engineers reviewing the R5F1211AASP#30 datasheet, R5F1211AASP#30 pinout, R5F1211AASP#30 application, or R5F1211AASP#30 equivalent, key selection criteria include its LSSOP-10 package, 16 KB code flash with self-programming, 10-bit ADC accuracy at VDD = 5.5 V, CTSU channel count, and compatibility with Renesas' CS+ and e² studio development tools.

Technical Context

The R5F1211AASP#30 implements the RL78 CPU core with a 3-stage pipeline CISC architecture, supporting instruction execution times from 0.0625 μs (16 MHz high-speed on-chip oscillator) to 30.5 μs (32.768 kHz subsystem clock). Its memory subsystem includes 16 KB code flash (1 KB block size), 1 KB data flash (512 B blocks, 1M rewrite cycles), and 2 KB SRAM.

Peripheral integration centers on HMI support: a 15-channel capacitive touch sensing unit (CTSU) with self- and mutual-capacitance modes, 4-channel 8/10-bit ADC with internal reference (0.815 V), two comparators with selectable internal/external reference, and three serial interfaces - simplified SPI (CSI), UART, and I²C - all configurable via peripheral I/O redirection registers (PIOR).

Key Specifications

Pinout & Package

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

Key Features

Applications

Equivalent & Alternatives

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

Compared with R5F1211CASP#30 and R5F1214AASP#30, the R5F1211AASP#30 delivers optimal cost and size efficiency for minimal-touch HMI applications-offering full CTSU, RTC, and ADC functionality in the smallest 10-pin LSSOP form factor without flash or pin overhead.

Availability

R5F1211AASP#30 is available at Aetrix Electronics and suitable for appliance control panels, smart thermostats, USB-powered smart plugs, and industrial sensor nodes requiring stable component supply across production lifecycles.

Supply support for R5F1211AASP#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 is a global semiconductor leader specializing in microcontrollers, analog, power, and SoC solutions for automotive, industrial, and IoT markets.

The RL78/G16 product line targets cost-sensitive, ultra-low-power embedded applications requiring integrated HMI, analog sensing, and real-time control-designed specifically for consumer appliances and smart home devices.

FAQ

What is the maximum operating frequency of the R5F1211AASP#30?

The R5F1211AASP#30 supports a maximum CPU operating frequency of 16 MHz using its on-chip high-speed oscillator. This yields a minimum instruction execution time of 0.0625 μs under high-speed conditions. The oscillator offers selectable frequencies (16/8/4/2/1 MHz) with ±1.0% accuracy across −20 to +85°C, eliminating need for external crystals in most consumer applications. R5F1211AASP#30 maintains full peripheral functionality-including CTSU and ADC-at all supported frequencies.

Does the R5F1211AASP#30 support in-system programming (ISP)?

Yes, the R5F1211AASP#30 supports in-system programming via its on-chip debug interface (TOOL0/TOOLRxD/TOOLTxD pins) using Renesas' Flash Development Toolkit (FDT) or CS+ IDE. It features self-programming capability for both code and data flash without requiring boot swap functionality. Erase/write operations are performed in 1 KB (code) or 512 B (data) blocks, with data flash rated for 1,000,000 rewrite cycles at VDD = 2.4–5.5 V. R5F1211AASP#30 does not support background operation during data flash rewriting.

How many capacitive touch channels does the R5F1211AASP#30 support?

The R5F1211AASP#30 integrates a 15-channel Capacitive Touch Sensing Unit (CTSU) supporting both self-capacitance (15 independent keys) and mutual-capacitance (up to 16 keys in matrix configuration) modes. All 15 channels map to dedicated TSCAP and TSxx pins (TS00–TS04, plus extended TS10–TS14 on larger packages-but only TS00–TS04 are accessible in the 10-pin LSSOP variant). R5F1211AASP#30 achieves <10 pF sensitivity resolution and includes automatic drift compensation, enabling robust operation through glass or plastic overlays.

What are the analog input capabilities of the R5F1211AASP#30?

The R5F1211AASP#30 features a 4-channel, 8/10-bit successive-approximation ADC with programmable resolution, operating across the full VDD range (2.4–5.5 V). It includes an internal 0.815 V reference (typical), temperature sensor, and touch voltage selection. Inputs ANI0–ANI3 map directly to pins P01, P02, P03, and P04. R5F1211AASP#30 supports single-ended conversion only; differential mode is not available. Conversion time is 14 μs per 10-bit sample at 16 MHz CPU clock, with hardware-triggered sampling via timer or external event.

Is the R5F1211AASP#30 pin-compatible with other RL78/G16 variants in the same package?

Yes, the R5F1211AASP#30 is pin-compatible with other 10-pin LSSOP RL78/G16 devices including R5F1211CASP#30 (32 KB flash), R5F1211AGSP#30 (industrial −40 to +105°C), and R5F1211AMSP#30 (extended −40 to +125°C). All share identical pinout, electrical characteristics, and peripheral mapping per Table 1-2 of the datasheet. R5F1211AASP#30 differs only in flash size (16 KB) and temperature grade (A: −40 to +85°C), enabling drop-in replacement where those parameters align with design requirements.