Renesas Electronics America Inc R5F10BMFCLFB#55

R5F10BMFCLFB#55 Microcontroller Product Summary

The R5F10BMFCLFB#55, designed by Renesas Electronics Corporation, is a member of the robust RL78/F13 family. It is a 16-bit microcontroller tailored to applications requiring a blend of performance, integration, and automotive-centric communications. Housed in an 80-pin LFQFP (Low-profile Quad Flat Package, 12 x 12 mm), this device offers 96 KB of on-chip flash memory and features extensive analog, digital, and communications peripherals. The R5F10BMFCLFB#55 provides a solid foundation for developers looking to design advanced motor control, body electronics, and networked subsystems, particularly in the automotive sector.

Main Characteristics of the R5F10BMFCLFB#55

The R5F10BMFCLFB#55 microcontroller integrates the following highlights:

16-bit RL78 CPU core running at up to 32 MHz (with a minimum instruction cycle time of 0.03125 μs at 32 MHz).

96 KB code flash memory and support for self-programming, boot swap, and flash shield window functions.

On-chip high-speed (up to 32 MHz) and low-speed (15 kHz, dual channels) oscillators, plus a versatile on-chip PLL (multipliers ×3/×4/×6/×8).

8 general-purpose register banks (32 registers, 8 bits each).

Integrated analog peripherals: 8/10-bit A/D converter (4–31 channels); Note: D/A converter and comparator are RL78/F14 only.

Broad timer resources: multiple 16-bit timers (array unit, RD, RJ), watchdog timer, and real-time clock (RTC).

Multiple communication interfaces, including CSI (SPI), UART (including LIN bus support), dedicated LIN module, simplified and standard I²C, and CAN (RS-CAN Lite) interfaces.

Rich I/O capability: up to 92 configurable pins, depending on package.

Advanced safety functions: CRC calculation, clock monitor, SFR guard, and more.

On-chip debugging and ROM protection functions.

Operating voltage range from 2.7 V to 5.5 V.

Wide temperature support: −40°C to +105°C (grade L), with high-temperature grades available.

Compliance with general automotive quality requirements; field upgrades and robust design in mind.

Intended Uses for R5F10BMFCLFB#55

The R5F10BMFCLFB#55 microcontroller is well-suited to a variety of demanding embedded control and networking tasks. In engineering terms, it is widely deployed within:

Automotive body and motor systems (motor control, door control, lighting control).

General electrical applications within vehicles requiring robust CAN/LIN networking.

Motorcycle engine control units.

Industrial and consumer domains, where reliable real-time control and communication are needed.

Available Models and Package Options for R5F10BMFCLFB#55

Renesas offers the RL78/F13 family in an extensive lineup, covering a range of memory sizes, interface combinations, and package options. The R5F10BMFCLFB#55 stands out as an 80-pin, 96 KB flash variant that integrates both CAN and LIN communications. Its package, an 80-LFQFP (12 × 12 mm), balances pin count and PCB real estate, facilitating both high-feature designs and compact layouts.

The RL78/F13 product group includes subsets with/without CAN and/or LIN, with pin counts from 20 to 80. The R5F10BMFCLFB#55’s selection is tuned for versatile applications where a medium-to-large pin count and robust communications are required.

Highlighted Functional Blocks in R5F10BMFCLFB#55

The block diagram for R5F10BMFCLFB#55 reveals a rich set of functional resources engineered for embedded control:

Central processing unit with 16-bit RL78 core, offering both high performance and low power through adjustable oscillator speeds and clocking options.

Memory subsystem: includes code flash (with mirrored areas for efficient code readout), internal RAM for stack/data/program uses, and data flash for non-volatile storage.

Multiple on-chip oscillators: High-speed (1–32 MHz, and up to 64 MHz for timer RD), low-speed, plus PLL multiplication for flexible clock domain setup.

Timer systems: 16-bit timer array units (multiple channels), timer RD (supports waveform and PWM generation), timer RJ, as well as RTC and dedicated watchdog functionality.

Communication resources: CSI (SPI), multiple UARTs (with LIN support), dedicated LIN and CAN modules, standard and simplified I²C interfaces; providing industrial/automotive-standard communications.

Analog peripherals: 8/10-bit ADC with flexible multiplexing, monitor and detection circuits, on-chip voltage detector/LVD, power-on reset.

Interrupt mechanisms: multiple high-priority/external interrupts, key interrupt support.

Event link controller (ELC), Data Transfer Controller (DTC) for efficient peripheral-to-peripheral or memory transfers.

Safety and diagnosis: on-chip CRC, SFR guards, stack monitoring, clock failure detection, and more.

On-chip debug block for development and field-support features.

Pin Layout and Pin Descriptions for R5F10BMFCLFB#55

The 80-pin configuration of R5F10BMFCLFB#55 is highly flexible, with well-defined alternate functions underpinning robust board-level designs. Key assignments include:

Multiple general-purpose I/O ports, each supporting alternative functions such as interrupts, timer/capture, communications, and analog interface.

Dedicated pins for power (VDD, EVDD0, EVDD1) and ground (VSS, EVSS0, EVSS1). Notably, specific pins supply dedicated port groups, enhancing noise immunity and power distribution.

Special purpose pins (RESET, REGC for on-chip voltage regulator stabilization, TOOL0 for debugging/programming interfaces, external clock/resonator connections).

Multiplexed analog and digital functions: Most port pins can be assigned via peripheral I/O redirection registers (PIOR), enabling streamlined PCB layouts and resource sharing.

Support for robust external connection, with guidelines for unused pin termination and the handling of reserved and configuration pins.

Suggested Pin Arrangements and Handling Instructions for R5F10BMFCLFB#55

To ensure optimal reliability, system designers are advised to observe the following recommendations:

All unused I/O pins should be tied off according to the guidance provided (typically pulled up/down or set as outputs to avoid floating inputs/EMI).

ESD precautions are critical: devices should be handled in static-controlled environments, with anti-static packing and grounded workstations.

Power supply and ground line decoupling: Bypass capacitors (about 0.1 μF) are recommended at each supply pin group, placed close to the device to suppress noise.

Special caution for power-on reset and supply sequencing—correct handling ensures deterministic startup and reliable operation.

Do not access reserved or undefined address ranges in either regular or extended register spaces, to avoid unpredictable operation.

Follow recommendations regarding external reset pin use, and ensure REGC is stabilized with a low-ESR capacitor (0.47 to 1 μF) to VSS.

When switching between RL78/F13 devices, verify electrical and memory configuration compatibility, as changes in the group or part number can affect valid operation margins.

Processor Core Design and Memory Mapping of R5F10BMFCLFB#55

At its core, the R5F10BMFCLFB#55 employs the RL78 16-bit architecture with an extensive set of addressing modes and register banks:

Memory space: 1 MB total, encompassing code flash (96 KB for this device), RAM (varies by group/package, here supporting 4–20 KB), and data flash.

Vector table: Addresses 00000H–0007FH, supporting fast interrupt and reset response.

Support for mirrored code flash areas, maximized for fast data reads and security options such as boot swap and shield windows.

Four general-purpose register banks, each with 8 × 8-bit registers, selectable for context switching and interrupt latency reduction.

Comprehensive stack and program status management registers for robust, deterministic control in real-time environments.

The device delivers advanced data transfer capabilities, with both normal and high-speed DTC channels for efficient, low-latency system response.

Register Layout and Special Function Registers in R5F10BMFCLFB#55

The device organizes peripheral, control, and status functions through a dedicated space of special function registers (SFRs):

SFRs (allocated at FFF00H–FFFFFH) include all core and peripheral control/status registers, manipulated with both bit and byte addressing.

Extended SFRs (F0000H–F07FFH) increase the peripheral register set, supporting advanced functions such as CAN configuration, test, and event linking.

All SFR and extended SFR access should respect valid address boundaries defined for this device; improper access may cause undefined behavior.

Register reset values and functionality are tightly controlled; device reset initializes all control, stack, and program state registers for deterministic startup.

Developers can utilize the C-coding model with #pragma sfr declarations, and flexible register/bit access (e.g., sfr.bit or sfr for 1/8/16-bit manipulations), supporting both high-level and low-level hardware programming paradigms.

Alternative or Replacement Devices for R5F10BMFCLFB#55

While the R5F10BMFCLFB#55 is tailored for a feature-rich, mid-to-upper-tier automotive and embedded application domain, migration within the RL78/F13 and RL78/F14 series is feasible, provided attention is given to pin count, memory size, and communication protocol support. For instance:

Within the RL78/F13 lineup, models with varying flash and RAM sizes (from 16 KB/1 KB up to 128 KB/20 KB), and with/without dedicated CAN or LIN, may provide functionally equivalent or downgraded/upgraded alternatives.

The RL78/F14 series offers advanced options (e.g., models with more flash/code RAM or additional analog outputs) for designs demanding further expansion or incremental feature enhancement.

Physical package compatibility (QFP, QFN, SSOP in various pin counts) supports drop-in replacement, provided supply and signal integrity are maintained.

When considering equivalent models, system and software designers must verify the availability and configuration of specific peripheral functions (e.g., A/D channels, timer resources, CAN/LIN hardware), as well as the mechanical layout and operating temperature requirements.

Conclusion

The Renesas R5F10BMFCLFB#55 RL78/F13 microcontroller represents a comprehensive solution for automotive and embedded system designs demanding efficient CPU performance, a wealth of communication options (including CAN and LIN), and strong safety and self-diagnosis features. Its mature hardware architecture, versatile package, and scalable feature set provide system engineers and procurement teams with an effective path to robust, long-lifecycle applications, especially where real-time reliability and flexible integration are essential. For engineers planning to design, migrate, or expand automotive or industrial control platforms, the R5F10BMFCLFB#55 stands as a reliable and cost-effective cornerstone, with migration paths throughout the RL78 family.