Renesas R5F100LGDFB#X0

Overview

R5F100LGDFB#X0 from Renesas is a 64-pin LFQFP-packaged RL78/G13 16-bit MCU with 128 KB flash, 8 KB data flash, 12 KB RAM, 32 MHz max CPU speed, and ultra-low-power operation (66 μA/MHz active, 0.57 μA RTC+LVD). It integrates 16-bit timers, 10-bit ADC (26 channels), UART/SPI/I²C interfaces, RTC, and DMA for industrial control and sensor node applications.

For engineers reviewing the R5F100LGDFB#X0 datasheet, R5F100LGDFB#X0 pinout, R5F100LGDFB#X0 application, or R5F100LGDFB#X0 equivalent, key selection criteria include its -40°C to +105°C industrial temperature grade (G), 0.5-mm pitch LFQFP-64 package, integrated data flash with 1M rewrite cycles, real-time clock with calendar/alarm, and support for SNOOZE mode for low-power sensor wake-up.

Technical Context

The R5F100LGDFB#X0 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 dual-clock domains: high-speed on-chip oscillator (±1.0% accuracy, 1–32 MHz selectable) and dedicated low-speed oscillator for watchdog/RTC.

Its peripheral set includes up to 16× 16-bit timers, 1× 12-bit interval timer, 1× real-time clock with calendar and clock correction, 1× watchdog timer, and 3× I²C/Simplified I²C channels - all configurable via register-based control without external components.

Key Specifications

Pinout & Package

Package: LFQFP-64, 10 mm × 10 mm, 0.5 mm pitch, exposed pad (PLQP0064KF-A).

Key Features

Applications

Equivalent & Alternatives

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

Compared with R5F100LGDFB#X0, R5F101LGDFB#X0 reduces nonvolatile storage capability but lowers cost and power in fixed-function designs, while R5F100LHDFB#X0 scales memory resources for evolving firmware requirements - both retain identical industrial temperature rating, LFQFP-64 footprint, and peripheral compatibility.

Availability

R5F100LGDFB#X0 is available at Aetrix Electronics and suitable for industrial automation, smart metering, and appliance control applications requiring stable component supply across long product lifecycles.

Supply support for R5F100LGDFB#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 delivering microcontrollers, analog, power, and SoC solutions for automotive, industrial, and IoT markets.

The RL78/G13 family is engineered for ultra-low-power general-purpose embedded control, targeting cost-sensitive industrial and consumer devices where energy efficiency, integration, and qualification for extended temperature operation are critical.

FAQ

What is the maximum operating frequency and corresponding performance of the R5F100LGDFB#X0?

The R5F100LGDFB#X0 operates at up to 32 MHz, delivering 41 DMIPS of processing performance. Its RL78 CPU core achieves this with a 3-stage pipeline and minimum instruction execution time of 0.03125 μs under high-speed on-chip oscillator conditions. This performance level supports real-time control loops, communication protocol stacks, and sensor fusion algorithms without external acceleration. The R5F100LGDFB#X0 maintains full peripheral functionality across its entire 1.6–5.5 V and -40°C to +105°C operating range.

Does the R5F100LGDFB#X0 include an integrated real-time clock with calendar function?

Yes, the R5F100LGDFB#X0 includes a dedicated real-time clock (RTC) peripheral with full calendar support (year/month/day/hour/minute/second), alarm interrupt capability, and hardware clock correction. It operates independently in STOP mode using the 32.768 kHz subsystem clock, consuming only 0.57 μA total system current. The RTC retains timekeeping accuracy across voltage dips and thermal drift via programmable correction registers, eliminating the need for external RTC ICs or manual recalibration in applications like energy meters and building controllers.

What are the data flash endurance and programming voltage requirements for the R5F100LGDFB#X0?

The R5F100LGDFB#X0 provides 8 KB of on-chip data flash rated for 1,000,000 write/erase cycles (typical) and supports background operation (BGO), allowing program execution from code flash while rewriting data flash. Programming is supported across the full VDD range of 1.8 V to 5.5 V, enabling reliable field updates even under brown-out conditions. The flash library reserves specific RAM regions (e.g., F7F00H for R5F100xL variants) for self-programming operations, and the R5F100LGDFB#X0 implements flash shield window and block protection to prevent unauthorized access or corruption.

How does the R5F100LGDFB#X0 support low-power operation in battery-powered applications?

The R5F100LGDFB#X0 supports three ultra-low-power modes: HALT (0.94 μA), STOP (0.57 μA with RTC and LVD active), and SNOOZE (fast wake-up from low-power peripheral activity). Its 66 μA/MHz active current and sub-μA retention modes enable multi-year battery life in sensor nodes and portable equipment. The SNOOZE mode allows UART, ADC, or timer interrupts to wake the core without exiting low-power state - critical for duty-cycled wireless transceivers or periodic environmental sampling. All power modes are software-configurable without external components, and the R5F100LGDFB#X0 maintains full register context across transitions.

Is the R5F100LGDFB#X0 pin-compatible with other RL78/G13 variants in the same package?

Yes, the R5F100LGDFB#X0 is pin-compatible with all other RL78/G13 MCUs in the 64-pin LFQFP-0.5mm package (e.g., R5F100LHDFB#X0, R5F101LGDFB#X0), sharing identical pin functions, electrical characteristics, and mechanical footprint (PLQP0064KF-A). This enables drop-in replacement for memory or feature scaling - for example, upgrading to 192 KB flash or downgrading to no data flash - without PCB redesign. However, firmware must be validated for memory map and peripheral enable differences, as the R5F100LGDFB#X0's 128 KB flash and 8 KB data flash allocation is fixed per variant.