Renesas R5F1217AGNA#40

Overview

R5F1217AGNA#40 from Renesas Electronics is a 24-pin, 32 KB flash, 2 KB RAM RL78/G16 16-bit microcontroller in HWQFN-24 (4 × 4 mm, 0.5-mm pitch) package, operating from 2.4–5.5 V with industrial-grade temperature range (−40°C to +105°C), integrated capacitive touch sensing (15 channels), 10-bit A/D converter (11-channel), and real-time clock with calendar function - deployed in smart appliance control panels.

For engineers reviewing the R5F1217AGNA#40 datasheet, R5F1217AGNA#40 pinout, R5F1217AGNA#40 application, or R5F1217AGNA#40 equivalent, key selection criteria include its 24-pin HWQFN footprint, 32 KB code flash with self-programming, CTSU-based touch interface support, and dual serial interfaces (I²C + simplified SPI/CSI) for sensor and display subsystem integration.

Technical Context

The R5F1217AGNA#40 implements the RL78 CPU core with 3-stage pipeline CISC architecture, supporting variable instruction execution time from 0.0625 μs (@16 MHz high-speed on-chip oscillator) to 30.5 μs (@32.768 kHz subsystem clock). It integrates a dedicated low-speed on-chip oscillator for watchdog and RTC operation independent of main clock domain.

Its peripheral set includes eight 16-bit timers, one 12-bit interval timer, one watchdog timer, one 99-year real-time clock (RTC2) with alarm and correction, and a capacitive touch sensing unit (CTSUb) supporting both self- and mutual-capacitance configurations across up to 16 keys using 15 pins.

Key Specifications

Pinout & Package

24-pin HWQFN (4.0 × 4.0 mm, 0.5-mm pitch) with exposed die pad requiring soldering to a non-electrical plated area per Renesas design guidance.

Key Features

Applications

Equivalent & Alternatives

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

Compared with R5F1217CGNA#40 and R5F1217AMNA#40, the R5F1217AGNA#40 delivers the precise industrial temperature envelope (−40°C to +105°C) required for HVAC, factory automation, and white goods - avoiding over-specification of M-grade cost or under-specification of A-grade thermal limits.

Availability

R5F1217AGNA#40 is available at Aetrix Electronics and suitable for smart appliance control panels, industrial HMI keypads, energy meter user interfaces, and white goods motor control monitors requiring stable component supply across multi-year production cycles.

Supply support for R5F1217AGNA#40 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 Japanese semiconductor manufacturer specializing in microcontrollers, analog, and power solutions for industrial, automotive, and IoT markets.

The RL78/G16 product line delivers ultra-low-power 16-bit MCUs with integrated capacitive touch and real-time clock - designed specifically for cost-sensitive, battery-aware, and human-interface-dominant embedded systems.

FAQ

What is the maximum operating frequency and corresponding instruction cycle time for the R5F1217AGNA#40?

The R5F1217AGNA#40 achieves a maximum operating frequency of 16 MHz using its high-speed on-chip oscillator, delivering a minimum instruction execution time of 0.0625 μs. This timing is confirmed in the RL78/G16 datasheet Rev.1.30 Section 1.1 under "RL78 CPU core" specifications. The R5F1217AGNA#40 maintains this performance across its full industrial temperature range (−40°C to +105°C).

Does the R5F1217AGNA#40 support background data flash rewriting while executing code from main flash memory?

No, the R5F1217AGNA#40 does not support background operation (BGO) for data flash rewriting. As stated in the datasheet Section 1.1, "Background operation (BGO) is not supported - instructions cannot be executed from the code flash memory while rewriting the data flash memory." Therefore, the R5F1217AGNA#40 requires careful state management during data updates, typically using HALT mode or interrupt-controlled sequencing.

How many capacitive touch channels does the R5F1217AGNA#40 support, and what configuration options are available?

The R5F1217AGNA#40 integrates the CTSUb (Capacitive Touch Sensing Unit) supporting 15 dedicated channels. It enables self-capacitance mode (one key per pin, up to 15 keys) or mutual-capacitance matrix mode (transmit/receive pin pairing from the same 15 pins, supporting up to 16 keys). This capability is documented in Section 1.1 "Capacitive touch sensing unit (CTSUb)" of the R5F1217AGNA#40 datasheet.

What are the valid power supply voltage ranges and associated operating conditions for the R5F1217AGNA#40?

The R5F1217AGNA#40 operates from a single VDD supply of 2.4 V to 5.5 V across its full industrial temperature range of −40°C to +105°C. This voltage specification applies to all functional blocks including flash programming, A/D conversion, and CTSU operation - confirmed in Section 1.1 "Low power consumption technology" and Table 1-1 of the RL78/G16 datasheet Rev.1.30. The R5F1217AGNA#40 maintains full functionality across this entire range without derating.

Which communication interfaces are available on the R5F1217AGNA#40, and how many instances of each are implemented?

The R5F1217AGNA#40 provides one I²C interface (IICA), one simplified I²C (SIICA), up to three simplified SPI (CSI) channels, and up to three UART channels. These are explicitly listed in Section 1.1 "Serial interface" of the datasheet. Pin multiplexing allows flexible allocation - for example, P41 supports SCK20/SCL20 (secondary I²C), and P00/P01 serve primary UART (TxD0/RxD0) and I²C (SCLA0/SDAA0) simultaneously depending on PIOR configuration. The R5F1217AGNA#40 supports concurrent use of multiple interfaces.