Renesas R5F104BCAFP#10

Overview

R5F104BCAFP#10 from Renesas is a 32-bit RL78/G14 microcontroller with 16 KB flash, 2.5 KB RAM, and 32-pin LQFP-0.8 mm package, operating from 1.6–5.5 V at -40 to +85°C. It delivers 44 DMIPS at 32 MHz, features ultra-low power (66 μA/MHz active, 0.60 μA RTC+LVD), integrated 10-bit ADC (8 ch), UART/SPI/I²C interfaces, and real-time clock - used in battery-powered industrial sensors and smart metering endpoints.

For engineers reviewing the R5F104BCAFP#10 datasheet, R5F104BCAFP#10 pinout, R5F104BCAFP#10 application, or R5F104BCAFP#10 equivalent, key selection criteria include its 32-pin LQFP footprint, 16 KB code flash with data flash shield, 10-bit ADC input count, RTC calendar support, and HALT/STOP/SNOOZE low-power modes for energy-constrained embedded control.

Technical Context

The R5F104BCAFP#10 implements the RL78 CPU core with CISC architecture and 3-stage pipeline, supporting instruction execution times from 0.03125 µs (32 MHz) to 30.5 µs (32.768 kHz). It integrates on-chip debug, self-programming flash with boot swapping, and background operation for data flash writes.

Peripheral integration includes Timer Array Unit (TAU) with up to 8 channels, 12-bit interval timer, watchdog timer with dedicated oscillator, and Event Link Controller (ELC) enabling direct peripheral-to-peripheral event triggering without CPU intervention - reducing latency and power in deterministic real-time tasks.

Key Specifications

Pinout & Package

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

Key Features

Applications

Equivalent & Alternatives

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

Compared with R5F104BAFP#10, the R5F104BCAFP#10 adds 4 KB data flash for secure runtime configuration; compared with R5F104BDAFP#10, it trades memory headroom for lower cost and smaller flash erase granularity - ideal for fixed-function, battery-critical endpoints.

Availability

R5F104BCAFP#10 is available at Aetrix Electronics and suitable for smart metering, industrial sensor nodes, home appliance control, and portable medical diagnostics requiring stable component supply across long production lifecycles.

Supply support for R5F104BCAFP#10 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 embedded applications - designed to replace legacy 8/16-bit MCUs while delivering 32-bit performance and advanced peripheral integration in compact packages.

FAQ

What is the maximum operating frequency of the R5F104BCAFP#10?

The R5F104BCAFP#10 achieves a maximum CPU speed of 32 MHz using the high-speed on-chip oscillator. At this frequency, it delivers 44 DMIPS performance with a minimum instruction execution time of 0.03125 µs. The oscillator supports selectable frequencies from 1 MHz to 64 MHz, with ±1.0% accuracy across 1.8–5.5 V and -20 to +85°C ambient conditions. The R5F104BCAFP#10 maintains full peripheral functionality at all supported clock rates.

Does the R5F104BCAFP#10 include an integrated analog-to-digital converter?

Yes, the R5F104BCAFP#10 integrates a 10-bit successive-approximation ADC with up to 8 analog input channels. It supports internal reference voltage (1.45 V) and includes an on-chip temperature sensor for system-level thermal monitoring. Input voltage range is 0 to VDD, and conversion results are accessible via DMA or interrupt-driven reads. The ADC operates across the full 1.6–5.5 V supply range, making it suitable for direct battery-voltage sensing in portable applications.

What low-power modes does the R5F104BCAFP#10 support, and what are their typical current draws?

The R5F104BCAFP#10 supports HALT (66 μA/MHz), STOP (0.60 μA), and SNOOZE modes. In STOP mode with only RTC and LVD active, it consumes just 0.60 μA - enabling multi-year battery operation in intermittent-sensing applications. HALT mode retains RAM and register contents while stopping the CPU clock; SNOOZE allows selected peripherals (e.g., ADC, UART) to operate autonomously under ELC control. All modes retain pin state and support wake-up via interrupts or RTC alarms.

Is the R5F104BCAFP#10 pin-compatible with other RL78/G14 variants in the same package?

Yes, all RL78/G14 devices in the 32-pin LQFP-0.8 mm package - including R5F104BAFP#10, R5F104BCAFP#10, and R5F104BDAFP#10 - share identical pinouts and electrical characteristics. This allows drop-in replacement across memory variants without PCB redesign. Peripheral function mapping (e.g., UART, ADC, timers) is consistent; only flash/RAM capacities and data flash presence differ. Firmware binary compatibility is maintained within the same memory configuration group.

What development tools are officially supported for the R5F104BCAFP#10?

Renesas provides full toolchain support for the R5F104BCAFP#10 via CS+ (formerly CubeSuite+), e² studio with GCC-RL78, and the Renesas Flash Programmer. Hardware debugging uses E2 emulator Lite or E2 emulator, both compatible with the 32-pin LQFP package's SWD interface (pins P50/P51). Renesas also offers the YRDKRL78G14 evaluation kit, which includes a socketed R5F104BCAFP#10-compatible MCU and expansion headers for rapid prototyping of sensor, motor, and communication subsystems.