Renesas R5F100MHAFB#X0

Overview

R5F100MHAFB#X0 from Renesas is an RL78/G13 80-pin, 128 KB flash, 12 KB RAM, ultra-low-power 16-bit MCU with integrated RTC, 10-bit ADC (26 channels), and multiple serial interfaces (UART, I²C, CSI) for industrial control and sensor node applications operating from 1.6 V to 5.5 V.

For engineers reviewing the R5F100MHAFB#X0 datasheet, R5F100MHAFB#X0 pinout, R5F100MHAFB#X0 application, or R5F100MHAFB#X0 equivalent, key selection criteria include its LFQFP-80 (0.5 mm pitch) package, -40°C to +105°C industrial temperature grade (G), 0.57 μA STOP mode current, and on-chip data flash (8 KB) supporting background rewriting.

Technical Context

The R5F100MHAFB#X0 implements the RL78 CPU core with a 3-stage pipeline, supporting instruction execution times from 0.03125 μs (32 MHz HS mode) to 30.5 μs (32.768 kHz subsystem clock). It integrates a 12-bit interval timer, calendar-mode real-time clock with alarm and correction, and a watchdog timer driven by a dedicated low-speed on-chip oscillator.

Power management includes HALT, STOP, and SNOOZE modes, with voltage detector (LVD) interrupt/reset selectable across 14 levels and on-chip POR. The DMA controller supports 4 channels with 2-clock transfers between SFR and RAM, enabling efficient peripheral-to-memory data movement without CPU intervention.

Key Specifications

Pinout & Package

Package: 80-pin LFQFP (12 × 12 mm, 0.50-mm pitch), RoHS-compliant, moisture sensitivity level 3.

Key Features

Applications

Equivalent & Alternatives

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

Compared with R5F100MHAFB#X0, the #V0 variant offers identical electrical and functional performance in tray packaging for low-volume builds, while R5F101MHAFB#X0 removes data flash to reduce cost-making it viable only where background data logging or secure parameter storage is unnecessary.

Availability

R5F100MHAFB#X0 is available at Aetrix Electronics and suitable for industrial automation, smart metering, and building control systems requiring stable component supply across extended product lifecycles.

Supply support for R5F100MHAFB#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 enterprise applications.

The RL78/G13 family targets cost-sensitive, ultra-low-power general-purpose embedded systems - emphasizing energy efficiency, integration density, and toolchain maturity for rapid development of industrial and consumer devices.

FAQ

What is the maximum operating frequency and corresponding DMIPS rating of the R5F100MHAFB#X0?

The R5F100MHAFB#X0 achieves a maximum operating frequency of 32 MHz using the high-speed on-chip oscillator, delivering 41 DMIPS of processing performance. Its RL78 CPU core features a 3-stage pipeline and supports variable instruction execution times - from 0.03125 μs at full speed to 30.5 μs in ultra-low-speed subsystem clock mode - enabling dynamic power/performance scaling in the R5F100MHAFB#X0.

Does the R5F100MHAFB#X0 support background data flash rewriting while executing application code?

Yes, the R5F100MHAFB#X0 supports Background Operation (BGO) for its 8 KB data flash memory. This allows the R5F100MHAFB#X0 to execute instructions from program memory concurrently with data flash erase/write operations - eliminating CPU stalls during firmware parameter updates or event logging. BGO is hardware-enabled and requires no special linker configuration in the R5F100MHAFB#X0 toolchain.

What is the pin-compatible replacement option if data flash functionality is not required for my design using R5F100MHAFB#X0?

The R5F101MHAFB#X0 is the direct functionally equivalent variant without data flash memory. It shares identical pinout, package (LFQFP-80), core, peripherals, and temperature rating (-40°C to +105°C) with the R5F100MHAFB#X0, differing only in the omission of the 8 KB data flash block. This makes the R5F101MHAFB#X0 a drop-in alternative when nonvolatile parameter storage or field firmware updates are unnecessary in your R5F100MHAFB#X0-based design.

How does the R5F100MHAFB#X0 achieve ultra-low power consumption in STOP mode?

The R5F100MHAFB#X0 achieves 0.57 μA STOP mode current by powering down the CPU, flash, RAM, and most peripherals while retaining operation of the real-time clock (RTC), low-voltage detector (LVD), and associated wakeup logic. This state is entered via software command and exited by RTC alarm, LVD event, or external interrupt - enabling the R5F100MHAFB#X0 to maintain accurate timekeeping and system supervision with minimal energy draw over years of battery operation.

What debug interface does the R5F100MHAFB#X0 provide, and how is it accessed?

The R5F100MHAFB#X0 provides an on-chip debug interface accessible via the TOOLRxD pin (P11) and dedicated debug pins (RES, RESET, etc.), supporting full-featured debugging including breakpoints, watchpoints, and flash programming through Renesas E2 studio and CS+ IDEs. No external JTAG adapter is required - the R5F100MHAFB#X0 debug circuitry is integrated and activated automatically when connected to a compatible debugger, enabling seamless firmware development and validation directly on the R5F100MHAFB#X0 target hardware.