Renesas R5F1217CMNA#20

Overview

R5F1217CMNA#20 from Renesas Electronics is a 24-pin, 32 KB flash, 2 KB RAM RL78/G16 16-bit microcontroller with industrial-grade temperature range (−40°C to +125°C), integrated capacitive touch sensing unit (15-channel CTSU), and dual 10-bit A/D converter (11 analog inputs). It features an RL78 CPU core with 3-stage pipeline, high-speed on-chip oscillator (up to 16 MHz ±1.5%), and real-time clock with 99-year calendar - deployed in smart appliance control panels requiring low-power operation and human interface responsiveness.

For engineers reviewing the R5F1217CMNA#20 datasheet, R5F1217CMNA#20 pinout, R5F1217CMNA#20 application, or R5F1217CMNA#20 equivalent, key selection criteria include its HWQFN-24 package with exposed die pad, 24-pin multiplexed I/O supporting up to 11-channel ADC and 15-key touch, industrial temperature rating, and absence of background data flash operation during code execution.

Technical Context

The R5F1217CMNA#20 implements the RL78 CPU core with CISC architecture and configurable instruction timing (0.0625 μs minimum at 16 MHz, 30.5 μs at 32.768 kHz), enabling dynamic power/performance trade-offs across HALT and STOP low-power modes. Its memory subsystem includes 32 KB code flash (1 KB blocks), 1 KB data flash (512 B blocks, 1M rewrite cycles), and 2 KB on-chip RAM.

Peripheral integration centers on mixed-signal HMI support: 15-channel capacitive touch sensing unit (CTSU) with self- and mutual-capacitance modes, dual 10-bit A/D converters (11 total inputs), two comparators, RTC with alarm and correction, and serial interfaces including three simplified SPI/CSI channels, three UART channels, three simplified I²C channels, and one full I²C channel.

Key Specifications

Pinout & Package

24-pin HWQFN (4.0 × 4.0 mm, 0.5 mm pitch) with exposed die pad requiring thermal connection to PCB ground plane per Renesas design guidelines.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar 16-bit microcontroller applications.

Compared with R5F1217CGNA#20, the R5F1217CMNA#20 adds 16°C higher maximum junction temperature tolerance; compared with R5F1217AMNA#20, it doubles code flash capacity while retaining identical packaging and thermal qualification - enabling feature-rich firmware updates without hardware revision.

Availability

R5F1217CMNA#20 is available at Aetrix Electronics and suitable for smart appliance control panels, industrial HMI terminals, energy monitoring gateways, and white goods motor control subsystems requiring stable component supply across extended product lifecycles.

Supply support for R5F1217CMNA#20 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 group delivers ultra-low-power 16-bit MCUs optimized for cost-sensitive, touch-enabled embedded systems - combining capacitive sensing, real-time clock, and robust industrial qualification in compact packages.

FAQ

What is the maximum operating temperature specification for the R5F1217CMNA#20?

The R5F1217CMNA#20 is qualified for industrial applications with an operating ambient temperature range of −40°C to +125°C (M-grade). This rating applies to the full functional specification including flash programming, ADC operation, and CTSU performance - verified per Renesas test conditions in R01DS0431EJ0130.

Does the R5F1217CMNA#20 support background data flash rewriting while executing code from main flash?

No, the R5F1217CMNA#20 does not support background operation (BGO) for data flash. During data flash write/erase operations, instruction execution from code flash memory is halted - requiring careful state management in firmware to avoid system lockup during non-volatile parameter updates.

How many capacitive touch channels does the R5F1217CMNA#20 support, and what configurations are available?

The R5F1217CMNA#20 integrates a 15-channel capacitive touch sensing unit (CTSU) supporting both self-capacitance mode (up to 15 independent keys) and mutual-capacitance matrix mode (up to 16 keys using transmit/receive pin combinations selected from the 15 available pins).

What serial communication interfaces are available on the R5F1217CMNA#20?

The R5F1217CMNA#20 provides three simplified SPI (CSI) channels, three UART channels, three simplified I²C channels, and one full I²C channel - with flexible pin multiplexing allowing concurrent use of multiple interfaces via peripheral I/O redirection registers (PIOR).

Is an external crystal required for real-time clock operation on the R5F1217CMNA#20?

No, the R5F1217CMNA#20 includes a dedicated low-speed on-chip oscillator for watchdog timer and real-time clock operation. The RTC2 module supports 32.768 kHz crystal input for enhanced accuracy but can operate from the internal oscillator when external components are omitted.