Renesas R5F104PFAFA#X0

Overview

R5F104PFAFA#X0 from Renesas is a 100-pin LQFP-0.65mm, 96 KB flash, 12 KB RAM RL78/G14 16-bit microcontroller operating from 1.6–5.5 V, delivering 44 DMIPS at 32 MHz with true low-power operation (66 μA/MHz active, 0.60 μA RTC+LVD mode), used in industrial sensor nodes and battery-powered control systems.

For engineers reviewing the R5F104PFAFA#X0 datasheet, R5F104PFAFA#X0 pinout, R5F104PFAFA#X0 application, or R5F104PFAFA#X0 equivalent, key selection criteria include its 100-pin LQFP package, 96 KB code flash with data flash, integrated RTC + LVD, and support for LIN-capable UART, I²C, and CSI interfaces in extended temperature (−40 to +85°C) industrial applications.

Technical Context

The R5F104PFAFA#X0 implements the RL78 CPU core with CISC architecture, 3-stage pipeline, and configurable instruction timing (0.03125 μs @ 32 MHz to 30.5 μs @ 32.768 kHz). It integrates a 12-bit interval timer, calendar RTC with alarm/correction, and watchdog timer using a dedicated low-speed oscillator.

Peripheral integration includes up to 12-channel 16-bit Timer Array Unit (TAU), 8–20-channel 10-bit A/D converter with internal 1.45 V reference and temperature sensor, two 8-bit D/A channels, and event-driven peripheral control via Event Link Controller (ELC) supporting 19–26 event types.

Key Specifications

Pinout & Package

Package: 100-pin LQFP (14 × 20 mm, 0.65 mm pitch), RoHS-compliant, rated for −40 to +85°C industrial operation (A-grade).

Key Features

Applications

Equivalent & Alternatives

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

Compared with R5F104PGFAFA#X0, this part trades flash headroom for cost-sensitive designs; compared with R5F104PFAFB#X0, it offers easier assembly and thermal margin at the expense of board density-making R5F104PFAFA#X0 optimal for mid-volume industrial control where manufacturability and reliability outweigh miniaturization.

Availability

R5F104PFAFA#X0 is available at Aetrix Electronics and suitable for industrial sensor nodes, smart energy meters, and home appliance control systems requiring stable component supply, long-term lifecycle support, and guaranteed traceability.

Supply support for R5F104PFAFA#X0 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 delivers ultra-low-power 16-bit MCUs optimized for cost-sensitive industrial and consumer control applications requiring robust peripheral integration and long battery life.

FAQ

What is the maximum operating frequency and corresponding DMIPS rating for the R5F104PFAFA#X0?

The R5F104PFAFA#X0 operates at up to 32 MHz with a verified performance of 44 DMIPS. This metric is measured using the EEMBC CoreMark benchmark and reflects real-world throughput for control-loop and signal-processing workloads typical in industrial firmware. The RL78 core achieves this with its 3-stage pipeline and optimized instruction set, not peak theoretical clock rate alone.

Does the R5F104PFAFA#X0 support LIN bus communication, and which UART channel provides it?

Yes, the R5F104PFAFA#X0 supports LIN bus communication on UART channels 0, 1, and 2. Specifically, UART0 (pins P50/P51) and UART1 (P00/P01) include LIN break-detection and sync-byte handling in hardware, enabling compliant slave-node implementation without software bit-banging. The R5F104PFAFA#X0 datasheet confirms LIN functionality across all three UART modules.

What is the flash memory organization and security capability of the R5F104PFAFA#X0?

The R5F104PFAFA#X0 contains 96 KB of code flash organized in 1 KB blocks, with hardware-level prohibition of block erase and rewriting to prevent unauthorized firmware modification. It also supports self-programming with boot-swap and flash shield window features-allowing secure field updates while protecting critical bootloader sections. These capabilities are confirmed in the R5F104PFAFA#X0 functional specification and security chapter.

Can the R5F104PFAFA#X0 operate from a 1.8 V supply, and what peripherals remain functional at that voltage?

Yes, the R5F104PFAFA#X0 operates across 1.6–5.5 V, including 1.8 V. At 1.8 V, all core functions, 10-bit ADC (with internal 1.45 V reference), RTC, LVD, and most I/O (including 1.8 V tolerant pins) remain fully operational. However, high-speed on-chip oscillator accuracy degrades slightly (±2.0% vs. ±1.0% at 3.3 V), and CSI/SPI max speed is reduced-details are specified in the R5F104PFAFA#X0 electrical characteristics table.

How does the Event Link Controller (ELC) improve real-time performance in the R5F104PFAFA#X0?

The ELC in the R5F104PFAFA#X0 enables direct hardware linking of 19–26 peripheral events (e.g., timer overflow → ADC trigger → DMA transfer), eliminating CPU intervention and interrupt latency. For example, a TAU timer match can autonomously initiate an ADC conversion and store result to RAM via DTC-all within one clock cycle of the trigger. This deterministic behavior is documented in the R5F104PFAFA#X0 ELC section and verified in application notes AN2657 and R01AN2657.