Renesas R5F1211AGSP#50

Overview

R5F1211AGSP#50 from Renesas Electronics is a 10-pin, 16 KB flash RL78/G16 microcontroller with industrial-grade temperature range (−40°C to +105°C), 2 KB RAM, 1 KB data flash, and integrated capacitive touch sensing unit (15-channel CTSU). It operates from 2.4–5.5 V, supports HALT/STOP low-power modes, and delivers real-time control in space-constrained HMI applications such as appliance control panels and smart sensors.

For engineers reviewing the R5F1211AGSP#50 datasheet, R5F1211AGSP#50 pinout, R5F1211AGSP#50 application, or R5F1211AGSP#50 equivalent, key selection criteria include its LSSOP-10 package, 10-bit A/D converter (4-channel), dual serial interfaces (UART + simplified I²C), and on-chip RTC with calendar function for time-stamped event logging in battery-backed systems.

Technical Context

The R5F1211AGSP#50 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 map includes 16 KB code flash (1 KB block size), 1 KB data flash (512 B block, 1M rewrite cycles), and 2 KB SRAM.

Peripheral integration includes an 8/10-bit A/D converter with internal reference (0.815 V), two comparators, one 12-bit interval timer, eight 16-bit timer channels, watchdog timer, real-time clock (99-year calendar), and capacitive touch sensing unit supporting self- and mutual-capacitance configurations - all accessible via 10 I/O pins in LSSOP-10 package.

Key Specifications

Pinout & Package

Package: 10-pin plastic LSSOP (4.4 × 3.6 mm, 0.65-mm pitch), surface-mount, industrial-grade G-temp rating.

Key Features

Applications

Equivalent & Alternatives

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

Compared with R5F1211CGSP#50 and R5F1214AGSP#50, the R5F1211AGSP#50 offers optimal cost/performance balance for compact, touch-centric industrial controls where 16 KB flash and 4-channel ADC meet functional requirements without over-provisioning.

Availability

R5F1211AGSP#50 is available at Aetrix Electronics and suitable for appliance control panels, industrial sensor nodes, smart thermostats, and medical device keypads requiring stable component supply and long-term industrial-grade availability.

Supply support for R5F1211AGSP#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 is a global semiconductor leader specializing in microcontrollers, analog, and power solutions for automotive, industrial, and IoT markets.

The RL78/G16 product line targets ultra-low-power, cost-sensitive embedded applications requiring integrated analog, touch, and timing functions - optimized for HMI, sensor nodes, and white goods control.

FAQ

What is the maximum operating frequency of the R5F1211AGSP#50?

The R5F1211AGSP#50 supports a maximum CPU operating frequency of 16 MHz using the on-chip high-speed oscillator. Instruction execution time is 0.0625 μs at this speed. The oscillator is factory-trimmed to ±1.0% accuracy over −20°C to +85°C, making it suitable for timing-critical applications without external crystal dependency. The R5F1211AGSP#50 also supports lower-frequency modes down to 32.768 kHz for ultra-low-power RTC operation.

Does the R5F1211AGSP#50 support in-system programming (ISP)?

Yes, the R5F1211AGSP#50 supports self-programming of its on-chip flash memory via the on-chip debug interface (TOOL0/TOOLRxD/TOOLTxD pins). It allows firmware updates in the target system without removing the device, though it does not implement boot swap functionality. The R5F1211AGSP#50 requires no external programming hardware beyond a standard SWD/JTAG debugger, and flash writes occur after full-block erase (1 KB) with no restriction on voltage range (2.4–5.5 V).

How many capacitive touch channels does the R5F1211AGSP#50 support?

The R5F1211AGSP#50 integrates a 15-channel Capacitive Touch Sensing Unit (CTSU) supporting both self-capacitance (up to 15 keys, one per pin) and mutual-capacitance (up to 16 keys in matrix configuration using selected transmit/receive pins). All 15 channels are accessible within the 10-pin LSSOP package via dedicated TSCAP and TSxx pins (e.g., TS00–TS04), enabling robust touch interfaces in minimal board space. The R5F1211AGSP#50 does not require external RC networks or dedicated touch ASICs.

What communication interfaces are available on the R5F1211AGSP#50?

The R5F1211AGSP#50 provides one UART channel, one simplified I²C (SI²C) channel, and one simplified SPI (CSI) channel - all multiplexed across its 10 I/O pins. These interfaces support common peripheral connectivity including displays, EEPROMs, and sensors. Notably, the R5F1211AGSP#50 lacks full I²C master/slave capability and multi-channel UART; for designs requiring dual UART or full I²C, alternatives like R5F1214AGSP#50 should be considered.

Is the R5F1211AGSP#50 qualified for industrial temperature operation?

Yes, the R5F1211AGSP#50 carries the 'G' grade designation, specifying guaranteed operation from −40°C to +105°C ambient temperature. This qualification covers all electrical parameters including flash endurance, ADC accuracy, oscillator stability (±1.5% at +85°C to +105°C), and CTSU performance. The R5F1211AGSP#50 is designed for industrial environments such as factory automation panels, HVAC controllers, and outdoor sensor housings where extended thermal range is mandatory.