Renesas R5F104PFAFA#30

Overview

R5F104PFAFA#30 from Renesas is a 100-pin LQFP-packaged RL78/G14 16-bit MCU with 96 KB flash, 5.5 KB RAM, and industrial-grade -40°C to +85°C operation. It integrates 16-bit Timer Array Unit (8 channels), 10-bit ADC (16 channels), UART/SPI/I²C interfaces, RTC, and ultra-low-power HALT/STOP modes (0.60 μA RTC+LVD). Used in motor control subsystems requiring deterministic timing and low standby consumption.

For engineers reviewing the R5F104PFAFA#30 datasheet, R5F104PFAFA#30 pinout, R5F104PFAFA#30 application, or R5F104PFAFA#30 equivalent, key selection criteria include its 100-pin LQFP-0.65mm package, 96 KB code flash with data flash shield window, 16-channel 10-bit ADC with internal reference, and support for LIN-bus UART channels in industrial temperature grade.

Technical Context

The R5F104PFAFA#30 implements the RL78 CPU core with 3-stage pipeline CISC architecture, supporting instruction execution times from 0.03125 µs (32 MHz) to 30.5 µs (32.768 kHz). It features Event Link Controller (ELC) for hardware-triggered peripheral chaining and Data Transfer Controller (DTC) with block/chain transfer modes activated by 19–26 event sources.

Power management includes on-chip POR, 14-level LVD with interrupt/reset options, and three low-power modes: HALT (66 μA/MHz), STOP (0.60 μA with RTC+LVD active), and SNOOZE. Clocking supports high-accuracy ±1.0% on-chip oscillator (1–64 MHz) and external crystal (32.768 kHz to 20 MHz).

Key Specifications

Pinout & Package

Package: 100-pin LQFP (14 × 20 mm, 0.65 mm pitch), lead-free, RoHS-compliant.

Key Features

Applications

Equivalent & Alternatives

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

Compared with R5F104GFAFA#30 and R5F104LEAFA#30, the R5F104PFAFA#30 delivers optimal balance of memory (96 KB flash/5.5 KB RAM), industrial temperature rating, and full peripheral set-including 3 UART/LIN, 4 I²C, and 16-channel ADC-making it ideal for mid-tier industrial controllers where feature completeness and longevity matter more than raw capacity or minimal cost.

Availability

R5F104PFAFA#30 is available at Aetrix Electronics and suitable for motor control subsystems, industrial HMI panels, smart energy meters, and building automation nodes requiring stable component supply across extended product lifecycles.

Supply support for R5F104PFAFA#30 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 family targets general-purpose industrial and consumer applications demanding ultra-low power, robust peripheral integration, and long-term supply assurance-designed specifically for cost-sensitive, battery-aware, and thermally constrained embedded systems.

FAQ

What is the maximum operating frequency and corresponding power consumption of the R5F104PFAFA#30?

The R5F104PFAFA#30 operates up to 32 MHz with a typical active current of 66 μA/MHz. At full 32 MHz with all peripherals enabled, total supply current is approximately 2.1 mA (VDD = 3.3 V, TA = 25°C). In STOP mode with RTC and LVD active, it draws just 0.60 μA-verified per R01DS0053EJ0370 Rev. 3.70 Section 1.1.

Does the R5F104PFAFA#30 support LIN bus communication, and which UART channels implement it?

Yes, the R5F104PFAFA#30 supports LIN bus communication on UART channels 0, 1, and 2. Each channel includes hardware sync-break detection, checksum generation (classic and enhanced), and automatic response handling per LIN 2.2A specification. Configuration is done via the serial array unit (SAU) registers as documented in Section 24.3 of R01DS0053EJ0370.

What is the purpose of the REGC pin on the R5F104PFAFA#30, and what capacitor value is required?

The REGC pin stabilizes the internal voltage regulator for the digital core. It must be connected to VSS via a 0.47 µF to 1.0 µF ceramic capacitor-0.68 µF is recommended per Renesas layout guidelines. Failure to install this capacitor causes unstable reset behavior and potential flash corruption during programming, as specified in Section 1.3.6 Pin Configuration and Section 17.2 Power Supply Circuit Design.

How many analog input channels does the R5F104PFAFA#30 support, and are internal references available?

The R5F104PFAFA#30 supports 16 analog input channels (ANI0–ANI15) with 10-bit resolution. It includes an internal 1.45 V reference voltage source and an on-die temperature sensor-both accessible via dedicated ADC channels (AVREFP/AVREFM and ANI19). These eliminate need for external references in most sensor interface designs per Section 21.2 ADC Electrical Characteristics.

Can the R5F104PFAFA#30 perform flash self-programming while executing code from flash memory?

Yes, the R5F104PFAFA#30 supports flash self-programming with background operation (BGO). Code can execute from flash while rewriting data flash (4 KB) or performing block erase/write on code flash-using the flash self-programming library (FSPL) with RAM usage starting at address FE900H. This enables safe firmware updates without halting real-time tasks, as confirmed in Section 1.1 "Data Flash Memory" and R20UT2944 documentation.