Renesas R5F1211CGSP#70

Overview

R5F1211CGSP#70 from Renesas Electronics is a 10-pin, industrial-grade RL78/G16 microcontroller featuring a 32 KB code flash memory, 2 KB RAM, and integrated capacitive touch sensing unit (CTSU) with 15-channel self-capacitance support. It operates from 2.4 to 5.5 V, delivers ultra-low-power HALT/STOP modes, and targets embedded control in space-constrained industrial HMI and sensor interface applications.

For engineers reviewing the R5F1211CGSP#70 datasheet, R5F1211CGSP#70 pinout, R5F1211CGSP#70 application, or R5F1211CGSP#70 equivalent, key selection criteria include its 10-pin LSSOP package, −40°C to +105°C industrial temperature rating, 32 KB flash with background data flash rewrite capability, and dedicated CTSU for robust touch button implementation without external components.

Technical Context

The R5F1211CGSP#70 implements the RL78 CPU core with a 3-stage pipeline CISC architecture, supporting configurable 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 32 KB code flash (1 KB block size), 1 KB data flash (512 B blocks, 1M write cycles), and 2 KB SRAM.

Peripherals include an 8/10-bit A/D converter with up to 4 analog inputs, 16-bit timer array (8 channels), real-time clock with 99-year calendar, simplified SPI/I²C/UART interfaces (1 channel each), and a 15-channel capacitive touch sensing unit supporting both self- and mutual-capacitance configurations - all operating within the 2.4–5.5 V supply range and −40°C to +105°C ambient specification.

Key Specifications

Pinout & Package

10-pin plastic LSSOP (4.4 × 3.6 mm, 0.65-mm pitch), exposed pad not present. Pin functions are fixed per datasheet Table 1-2; peripheral I/O redirection is supported via PIOR registers for select multiplexed signals.

Key Features

Applications

Equivalent & Alternatives

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

Compared with R5F1211AGSP#70 and R5F1214CGSP#70, the R5F1211CGSP#70 uniquely balances full 32 KB flash capacity with the smallest 10-pin LSSOP footprint and industrial temperature rating - making it optimal for space-constrained, memory-intensive industrial HMI designs.

Availability

R5F1211CGSP#70 is available at Aetrix Electronics and suitable for industrial control panels, smart appliance interfaces, and energy monitoring sensor nodes requiring stable component supply across extended product lifecycles.

Supply support for R5F1211CGSP#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 is a global semiconductor leader specializing in microcontrollers, analog, and power solutions for automotive, industrial, and IoT markets.

The RL78/G16 group is designed for ultra-low-power embedded control in industrial HMI, sensor nodes, and appliance interfaces - emphasizing integrated touch, robust timing, and extended temperature operation.

FAQ

What is the maximum operating frequency of the R5F1211CGSP#70?

The R5F1211CGSP#70 supports a maximum CPU operating frequency of 16 MHz using its high-speed on-chip oscillator. This yields a minimum instruction execution time of 0.0625 μs. The oscillator offers selectable frequencies (16/8/4/2/1 MHz) with ±1.0% accuracy over −20°C to +85°C, enabling crystal-free operation in many applications.

Does the R5F1211CGSP#70 support in-system programming (ISP)?

Yes, the R5F1211CGSP#70 supports self-programming of its code flash and data flash memory via the on-chip debug interface. It does not require a boot swap function, allowing firmware updates in the field using standard Renesas flash programming tools and protocols without external hardware programmers.

How many analog input channels does the R5F1211CGSP#70 provide?

The R5F1211CGSP#70 provides 4 analog input channels (ANI0–ANI3), accessible via pins P00, P01, P02, and P04. These support 8/10-bit resolution A/D conversion with internal reference voltage (0.815 V TYP.) and temperature sensor integration - sufficient for basic sensor interfacing in compact industrial modules.

Can the R5F1211CGSP#70 operate without an external crystal?

Yes, the R5F1211CGSP#70 includes a high-speed on-chip oscillator (HSIO) with selectable frequencies from 1 MHz to 16 MHz and ±1.0% accuracy over industrial temperature ranges. This eliminates the need for external crystals in most timing-critical applications, reducing BOM cost and PCB area.

What is the purpose of the VCOUT0 pin on the R5F1211CGSP#70?

The VCOUT0 pin (P02) on the R5F1211CGSP#70 is a programmable voltage output that can generate a stable reference voltage for external analog circuitry or internal A/D conversion. It supports multiple output levels and is often used to bias sensors or drive analog comparators without external voltage dividers.