Renesas R5F104BCAFP#X0

Overview

R5F104BCAFP#X0 from Renesas is a 32-pin LQFP-0.8 mm pitch, 16 KB flash, 2.5 KB RAM RL78/G14 16-bit microcontroller operating from 1.6–5.5 V, delivering 44 DMIPS at 32 MHz with ultra-low power consumption (66 μA/MHz active, 0.60 μA RTC+LVD mode), used in battery-powered industrial sensor nodes and smart metering interfaces.

For engineers reviewing the R5F104BCAFP#X0 datasheet, R5F104BCAFP#X0 pinout, R5F104BCAFP#X0 application, or R5F104BCAFP#X0 equivalent, key selection criteria include its 16 KB code flash size, 32-pin LQFP package with 0.8 mm pitch, integrated 10-bit ADC (20-channel), dual UART/LIN support, and real-time clock with calendar function for time-stamped data logging.

Technical Context

The R5F104BCAFP#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 10-bit A/D converter with internal 1.45 V reference and temperature sensor, plus an 8-bit D/A converter with real-time output capability.

Its peripheral set includes Timer Array Unit (TAU) with up to 8 channels, 12-bit interval timer, watchdog timer, and Event Link Controller (ELC) enabling hardware-triggered peripheral chaining without CPU intervention-critical for deterministic low-latency control loops in motor drive subsystems.

Key Specifications

Pinout & Package

Package: 32-pin LQFP (7 × 7 mm, 0.8 mm pitch), RoHS-compliant, JEDEC standard PLQP0032GB-A footprint.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar 16-bit microcontroller applications.

Compared with R5F104BCAFP#X0, the R5F104BEAFP#X0 provides 4× more flash for complex protocol stacks, while the R5F104BCDFP#X0 guarantees operation at extended temperature extremes-both retain identical pinout, peripheral mapping, and debug infrastructure.

Availability

R5F104BCAFP#X0 is available at Aetrix Electronics and suitable for smart metering, industrial sensor nodes, and home appliance control requiring stable component supply, long-term lifecycle assurance, and RoHS-compliant manufacturing.

Supply support for R5F104BCAFP#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, and power solutions for automotive, industrial, and IoT markets.

The RL78/G14 product line delivers true low-power 16-bit MCUs optimized for cost-sensitive, battery-operated applications demanding high integration, robust real-time performance, and long-term supply stability.

FAQ

What is the maximum operating frequency and corresponding DMIPS rating for the R5F104BCAFP#X0?

The R5F104BCAFP#X0 operates at up to 32 MHz with a verified performance of 44 DMIPS. This metric reflects its RL78 CPU core efficiency under benchmark conditions using the EEMBC CoreMark suite. The high-speed on-chip oscillator supports this speed without external crystals, and the ±1.0% accuracy specification holds across the full 1.6–5.5 V supply and -40°C to +85°C temperature range. R5F104BCAFP#X0 maintains consistent timing behavior even during voltage scaling down to 1.6 V.

Does the R5F104BCAFP#X0 support LIN bus communication, and which UART channel implements it?

Yes, the R5F104BCAFP#X0 supports LIN bus communication through its UART2 peripheral (mapped to P13/TxD2 and P14/RxD2 pins). The hardware includes LIN-specific features such as automatic sync field detection, checksum calculation, and break signal generation per LIN 2.2A specification. R5F104BCAFP#X0 uses the same UART module for both standard UART and LIN modes, configured via the SMR register's LIN bit. No external transceiver is required for basic LIN node functionality.

What are the memory protection mechanisms available on the R5F104BCAFP#X0?

The R5F104BCAFP#X0 implements three memory protection layers: (1) Flash block erase/write prohibition via security fuse settings, (2) Data flash shield window that restricts write access to defined address ranges during runtime, and (3) Boot swap function enabling safe firmware updates by validating new code before switching execution. These features prevent unauthorized firmware modification and ensure fail-safe OTA updates. R5F104BCAFP#X0 also supports on-chip debug lock to disable external programming after production.

Can the R5F104BCAFP#X0 operate from a single 1.8 V supply, and what peripherals remain functional?

Yes, the R5F104BCAFP#X0 supports 1.6–5.5 V operation, including stable 1.8 V supply. At 1.8 V, all core functions-including 32 MHz operation (via high-speed oscillator), 10-bit ADC (with internal 1.45 V reference), RTC, and UART-remain fully operational. The LVD circuit provides 14 programmable threshold levels down to 1.6 V, enabling precise brownout detection. R5F104BCAFP#X0 maintains full peripheral compatibility across the entire voltage range without configuration changes.

How many analog input channels does the R5F104BCAFP#X0 support, and are internal references available?

The R5F104BCAFP#X0 supports up to 20 analog input channels (ANI0–ANI19) with 10-bit resolution. It includes an internal 1.45 V reference voltage source usable for ADC conversions, eliminating the need for external precision references in most applications. The device also integrates a calibrated temperature sensor accessible via ANI16, providing ±2°C accuracy from -40°C to +85°C. R5F104BCAFP#X0 allows simultaneous use of internal reference and temperature sensor without conflict.