Renesas R5F51101ADNF#20

Overview

R5F51101ADNF#20 from Renesas is a 32-bit RX CPU-based microcontroller operating at up to 32 MHz (50 DMIPS), featuring 32 KB flash, 10 KB SRAM, 12-bit A/D converter with 7 channels, RTC, and dual SCI interfaces - deployed in industrial sensor nodes requiring low-power operation and deterministic real-time response.

For engineers reviewing the R5F51101ADNF#20 datasheet, R5F51101ADNF#20 pinout, R5F51101ADNF#20 application, or R5F51101ADNF#20 equivalent, this page delivers verified package mapping (PWQN0040KC-A, 40-pin HWQFN), confirmed peripheral channel counts per package, supply voltage range (1.8–3.6 V), software standby current (0.35 μA), and RTC calendar mode support - all critical for embedded firmware development and BOM validation.

Technical Context

The R5F51101ADNF#20 implements a CISC Harvard architecture with five-stage pipeline and variable-length instructions, enabling ultra-compact code density. Its on-chip high-speed oscillator delivers 32 MHz ±1% accuracy across −40 to +85°C, synchronized to ICLK, PCLK, and FCLK domains for independent clock domain control of CPU, peripherals, and FlashIF.

It integrates a 14-channel-capable 12-bit A/D converter (S12AD) with 1.0 μs minimum conversion time at 32 MHz ADCLK, double-trigger mode for motor control, and supports external trigger (ADTRG0#) or timer-generated start signals. The MTU2 timer unit provides four 16-bit channels with phase counting, input capture, and PWM output - configured via eight selectable clock sources including PCLK/1 through PCLK/1024.

Key Specifications

Pinout & Package

PWQN0040KC-A is a 40-pin HWQFN package (6 × 6 mm, 0.5 mm pitch) with an exposed thermal pad recommended for connection to VSS. Pin functions are multiplexed via MPC, supporting up to 28 GPIOs (including 4× 5-V tolerant, 23× open-drain outputs) and dedicated analog inputs (AN000–AN004, AN006, AN008–AN015).

Key Features

Applications

Equivalent & Alternatives

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

Compared with R5F51101ADNF#20, R5F51101ADFM#30 offers expanded peripherals in a larger package, while R5F51103ADNF#U0 provides 2× flash capacity in identical 40-pin HWQFN form factor - enabling scalable firmware growth without hardware redesign.

Availability

R5F51101ADNF#20 is available at Aetrix Electronics and suitable for industrial sensor nodes, appliance control panels, motor drive interfaces, and IoT edge subsystems requiring stable component supply, long-term lifecycle support, and guaranteed traceable sourcing.

Supply support for R5F51101ADNF#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 Corporation is a global semiconductor leader specializing in microcontrollers, analog, power, and SoC solutions for automotive, industrial, and IoT markets.

The RX110 Group targets cost-sensitive, low-power embedded applications - delivering high code efficiency, integrated safety features (IEC 60730), and compact packages like PWQN0040KC-A for space-constrained designs.

FAQ

What is the maximum operating frequency and CPU performance of the R5F51101ADNF#20?

The R5F51101ADNF#20 operates at a maximum frequency of 32 MHz and delivers 50 DMIPS performance using its 32-bit RX CPU core. It achieves this with a five-stage pipeline, variable-length instruction encoding, and single-cycle execution for basic instructions - validated under 1.8–3.6 V supply and −40 to +85°C conditions as specified in the R01DS0202EJ0120 datasheet.

Which package type does the R5F51101ADNF#20 use, and what are its key mechanical features?

The R5F51101ADNF#20 uses the PWQN0040KC-A package: a 40-pin HWQFN measuring 6 × 6 mm with 0.5 mm pitch and an exposed thermal pad. Renesas recommends connecting the exposed pad to VSS for optimal thermal performance and EMI suppression - a requirement explicitly stated in the datasheet's mechanical notes for this variant.

How many A/D converter channels are available on the R5F51101ADNF#20, and what is their resolution and speed?

The R5F51101ADNF#20 includes a 12-bit A/D converter (S12AD) with 7 input channels (AN000–AN004, AN006, AN008–AN015) in the 40-pin HWQFN configuration. Minimum conversion time is 1.0 μs per channel when ADCLK runs at 32 MHz, and it supports double-trigger mode for synchronized sampling - confirmed in Table 1.2 of the R01DS0202EJ0120 datasheet.

Does the R5F51101ADNF#20 support real-time clock functionality, and what calendar features does it include?

Yes, the R5F51101ADNF#20 integrates a real-time clock (RTCA) module supporting both calendar count mode (with leap year correction) and binary count mode. It provides alarm, periodic, and carry interrupts, and can initiate exit from software standby mode - all confirmed in the "Real-time clock (RTC)" section of the R01DS0202EJ0120 datasheet.

What communication interfaces are implemented on the R5F51101ADNF#20, and which ones are excluded in the 40-pin package?

The R5F51101ADNF#20 implements SCI × 2 (SCI1, SCI5), RIIC × 1, and RSPI × 1. Per Table 1.2 of the R01DS0202EJ0120 datasheet, the 40-pin HWQFN variant excludes SCIf, SSLA1–SSLA3 slave-select outputs, and the full 14-channel A/D - retaining only 7 A/D channels and omitting the extended serial mode pins (RXDX12, TXDX12, SIOX12).