Renesas R5F104FHAFP#V0

Overview

R5F104FHAFP#V0 from Renesas is a 44-pin LQFP-packaged RL78/G14 16-bit microcontroller with 128 KB flash, 16 KB RAM, and 8 KB data flash, operating at up to 32 MHz (44 DMIPS), featuring ultra-low power consumption (66 μA/MHz active, 0.60 μA RTC+LVD mode), integrated 10-bit ADC (16 channels), dual UART/LIN, I²C, CSI, and real-time clock - deployed in industrial sensor nodes and battery-powered control modules.

For engineers reviewing the R5F104FHAFP#V0 datasheet, R5F104FHAFP#V0 pinout, R5F104FHAFP#V0 application, or R5F104FHAFP#V0 equivalent, key selection criteria include its 44-pin LQFP-0.8 mm pitch package, -40°C to +85°C industrial temperature grade (D suffix implied by #V0 tray packaging), 128 KB code flash with self-programming support, and peripheral set optimized for deterministic real-time control with low-voltage operation down to 1.6 V.

Technical Context

The R5F104FHAFP#V0 implements the RL78 CPU core with 3-stage pipeline CISC architecture, supporting instruction execution times from 0.03125 µs (32 MHz high-speed mode) to 30.5 µs (32.768 kHz ultra-low-power mode). It integrates a Data Transfer Controller (DTC) with chain transfer and an Event Link Controller (ELC) enabling direct peripheral-to-peripheral event routing without CPU intervention.

Its mixed-signal subsystem includes a 10-bit A/D converter with internal 1.45 V reference and temperature sensor, dual 8-bit D/A outputs (0–VDD range), two comparators with window/high-speed/low-speed modes, and hardware CRC calculation unit - all synchronized to the same clock domain as the CPU for deterministic timing in closed-loop applications.

Key Specifications

Pinout & Package

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

Key Features

Applications

Equivalent & Alternatives

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

Compared with R5F104GHAFP#V0, the R5F104FHAFP#V0 offers identical functionality with verified mask compatibility, while R5F104FHAFB#V0 trades package compatibility for expanded I/O - making the R5F104FHAFP#V0 optimal for cost-sensitive, space-constrained industrial control where pin-for-pin upgrade path matters.

Availability

R5F104FHAFP#V0 is available at Aetrix Electronics and suitable for industrial sensor nodes, smart HVAC actuators, and programmable logic relays requiring stable component supply, long-term lifecycle support, and RoHS-compliant manufacturing.

Supply support for R5F104FHAFP#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/G14 product line targets cost-sensitive, ultra-low-power general-purpose applications - delivering robust real-time performance, integrated analog peripherals, and simplified development for industrial control and sensing.

FAQ

What is the maximum operating frequency and corresponding DMIPS rating for the R5F104FHAFP#V0?

The R5F104FHAFP#V0 operates at a maximum frequency of 32 MHz, delivering 44 DMIPS (Dhrystone MIPS) performance. This is achieved using the RL78 CPU core's 3-stage pipeline and high-speed on-chip oscillator. The R5F104FHAFP#V0 maintains this performance across its full 1.6 V to 5.5 V supply range, with timing guarantees validated per Renesas datasheet R01DS0053EJ0370.

Does the R5F104FHAFP#V0 support hardware debugging and secure firmware updates?

Yes, the R5F104FHAFP#V0 includes an on-chip debug interface compliant with Renesas E1/E20 emulators and supports flash shield window protection. This allows selective locking of memory regions during programming, enabling secure field firmware updates without exposing full code flash contents. The R5F104FHAFP#V0 also supports boot swapping for fail-safe firmware upgrades.

How many analog input channels does the R5F104FHAFP#V0 ADC support, and what reference options are available?

The R5F104FHAFP#V0 integrates a 10-bit successive-approximation ADC with up to 16 analog input channels. It supports both external reference voltage (applied to AVREFP/AVREFM pins) and an internal 1.45 V reference. The ADC operates across the full 1.6 V to 5.5 V supply range, and includes an integrated temperature sensor for system-level thermal monitoring.

What is the purpose of the REGC pin on the R5F104FHAFP#V0, and what capacitor value is required?

REGC is the bypass terminal for the internal voltage regulator. It must be connected to VSS via a 0.47 µF to 1.0 µF ceramic capacitor to stabilize the internal regulated supply and suppress switching noise. Failure to populate this capacitor may cause erratic reset behavior or ADC inaccuracies. This requirement is explicitly specified in the R5F104FHAFP#V0 datasheet section 1.3.5 (44-pin LQFP pin configuration).

Which serial communication interfaces are available on the R5F104FHAFP#V0, and how many instances of each are implemented?

The R5F104FHAFP#V0 provides three UART/LIN channels (with LIN physical layer support), four I²C/simplified I²C channels, and up to eight CSI (equivalent to SPI) channels. All interfaces are independently configurable and can operate concurrently. The R5F104FHAFP#V0 uses peripheral I/O redirection registers to assign these functions to multiple pin combinations, increasing board layout flexibility.