Renesas R5F101FADFP#V0

Overview

R5F101FADFP#V0 from Renesas is a 44-pin LQFP-44, 16-bit RL78/G13 microcontroller with 96 KB flash, 4 KB data flash, 4 KB RAM, and industrial-grade -40°C to +85°C operation. It features ultra-low power consumption (66 μA/MHz active, 0.57 μA RTC+LVD), 32 MHz max CPU speed (41 DMIPS), integrated 10-bit ADC (12-channel), UART/SPI/I²C interfaces, and real-time clock with calendar support - deployed in smart metering and industrial sensor nodes.

For engineers reviewing the R5F101FADFP#V0 datasheet, R5F101FADFP#V0 pinout, R5F101FADFP#V0 application, or R5F101FADFP#V0 equivalent, key selection criteria include its data flash absence (vs. R5F100x series), LQFP-44 package with 0.8-mm pitch, industrial temperature rating (D-grade), and compatibility with Renesas' RL78 toolchain and E2 studio for low-power firmware development.

Technical Context

The R5F101FADFP#V0 implements the RL78 CPU core with CISC architecture and 3-stage pipeline, supporting variable instruction execution time (0.03125 μs at 32 MHz to 30.5 μs at 32.768 kHz). It integrates on-chip peripherals including 2–4 channel DMA, 16-bit timer array (up to 16 channels), 12-bit interval timer, and watchdog timer with dedicated low-speed oscillator.

Power management includes HALT, STOP, and SNOOZE modes, plus on-chip POR and 14-level LVD with interrupt/reset selection. The high-accuracy ±1.0% on-chip oscillator (1–32 MHz selectable) eliminates external crystal requirements for many timing-critical embedded applications.

Key Specifications

Pinout & Package

44-pin plastic LQFP (10 × 10 mm, 0.8-mm pitch), RoHS-compliant, moisture sensitivity level 3.

Key Features

Applications

Equivalent & Alternatives

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

Compared with R5F100FADFP#V0 and R5F101GADFP#V0, the R5F101FADFP#V0 offers optimal balance of industrial temperature rating, compact 44-pin footprint, and sufficient memory for cost-sensitive sensor and control applications - avoiding over-specification while retaining full RL78/G13 ecosystem compatibility.

Availability

R5F101FADFP#V0 is available at Aetrix Electronics and suitable for smart metering, industrial sensor nodes, factory I/O modules, and building control panels requiring stable component supply across extended production lifecycles.

Supply support for R5F101FADFP#V0 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/G13 family delivers true low-power performance for general-purpose embedded applications, targeting cost-sensitive industrial controls, home appliances, and sensor edge devices where energy efficiency and peripheral integration are critical.

FAQ

What is the maximum operating frequency and corresponding DMIPS rating for the R5F101FADFP#V0?

The R5F101FADFP#V0 operates at up to 32 MHz with a performance rating of 41 DMIPS. This is achieved using the high-speed on-chip oscillator, which maintains ±1.0% accuracy across 1.8–5.5 V and -20°C to +85°C - eliminating the need for an external crystal while ensuring deterministic real-time execution in the R5F101FADFP#V0.

Does the R5F101FADFP#V0 include data flash memory, and if not, what are the implications for firmware design?

No, the R5F101FADFP#V0 does not include data flash memory - unlike the R5F100x series. Firmware must use code flash sectors (with block erase restrictions) or external non-volatile memory for parameter storage. This affects update strategies: self-programming is possible but requires careful sector management, and background operation (BGO) is unavailable in the R5F101FADFP#V0.

What debug and programming interfaces are supported by the R5F101FADFP#V0?

The R5F101FADFP#V0 supports on-chip debugging via the TOOLRxD/TOOLTxD pins (mapped to P11/P12), compatible with Renesas E2 emulator and E2 studio. It also supports UART-based flash programming using the built-in bootloader - no JTAG header or external debugger is required for basic development and field updates of the R5F101FADFP#V0.

How does the R5F101FADFP#V0 achieve ultra-low power consumption, and what are the lowest current modes?

The R5F101FADFP#V0 achieves ultra-low power via HALT, STOP, and SNOOZE modes. In STOP mode with only RTC and LVD active, it draws just 0.57 μA - verified at VDD = 1.8–5.5 V and TA = -40°C to +85°C. This enables decade-long battery life in intermittent-sensing applications, a key differentiator of the R5F101FADFP#V0 versus standard 16-bit MCUs.

Is the R5F101FADFP#V0 pin-compatible with other RL78/G13 variants, and what package options share the same footprint?

Yes, the R5F101FADFP#V0 is pin-compatible with all 44-pin LQFP RL78/G13 variants (e.g., R5F100FADFP#V0, R5F101GADFP#V0 is not - it uses 48-pin LQFP). Its PLQP0044GC-A package (10 × 10 mm, 0.8-mm pitch) shares footprint and solder-reflow profile with other 44-pin LQFP members of the family, enabling hardware reuse across memory and feature variants of the R5F101FADFP#V0.