Renesas R5F100MJGFA#X0

Overview

R5F100MJGFA#X0 from Renesas is a 80-pin LQFP-0.65mm MCU in the RL78/G13 family, featuring 256 KB flash, 8 KB data flash, 20 KB RAM, 32 MHz max CPU speed (41 DMIPS), and ultra-low-power operation (66 μA/MHz active, 0.57 μA RTC+LVD mode). It integrates 16-bit timers, 10-bit ADC (26 channels), UART/LIN, I²C, CSI, RTC with calendar, and operates from 1.6–5.5 V across –40°C to +105°C for industrial control and sensor node applications.

For engineers reviewing the R5F100MJGFA#X0 datasheet, R5F100MJGFA#X0 pinout, R5F100MJGFA#X0 application, or R5F100MJGFA#X0 equivalent, key selection criteria include industrial-grade temperature support (–40°C to +105°C), integrated data flash with background operation and 1M rewrite cycles, hardware LIN bus support, and low-power SNOOZE/STOP/HALT modes for battery-powered systems.

Technical Context

The R5F100MJGFA#X0 implements the RL78 CPU core - a CISC architecture with 3-stage pipeline, supporting instruction execution times from 0.03125 μs (32 MHz high-speed mode) to 30.5 μs (32.768 kHz subsystem clock). It includes a dedicated low-speed on-chip oscillator for watchdog and RTC, plus a high-accuracy ±1.0% on-chip 32 MHz oscillator usable across full VDD (1.8–5.5 V) and temperature (–20°C to +85°C).

Its memory subsystem comprises 256 KB code flash (1 KB block size, security lockable), 8 KB data flash with background operation (BGO) enabling concurrent program execution during rewrites, and 20 KB SRAM - including designated flash library RAM regions (e.g., FAF00H for xJ-series parts). DMA supports 4 channels with 2-clock transfers between SFR and RAM.

Key Specifications

Pinout & Package

Package: 80-pin LQFP (14 × 14 mm, 0.65-mm pitch), RoHS-compliant, moisture sensitivity level (MSL) 3.

Key Features

Applications

Equivalent & Alternatives

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

Compared with R5F100MJGFA#X0, R5F100MLGFA#X0 provides double flash and RAM for scalable firmware growth, while R5F101MJGFA#X0 removes data flash entirely - offering cost optimization where persistent parameter storage is unnecessary or offloaded.

Availability

R5F100MJGFA#X0 is available at Aetrix Electronics and suitable for industrial motor control, smart sensor nodes, home appliance control, and HMI panel designs requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for R5F100MJGFA#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, power, and SoC solutions for automotive, industrial, and IoT markets.

The RL78/G13 family targets cost-sensitive, ultra-low-power general-purpose embedded applications - balancing performance, integration, and energy efficiency for industrial controls, appliances, and sensor edge devices.

FAQ

What is the maximum operating frequency and corresponding DMIPS rating of the R5F100MJGFA#X0?

The R5F100MJGFA#X0 operates at up to 32 MHz with a measured performance of 41 DMIPS. This rating reflects its RL78 CPU core's 3-stage pipeline efficiency and is validated under standard conditions per Renesas documentation (R01DS0131EJ0380 Rev.3.80). The R5F100MJGFA#X0 achieves this performance while maintaining ultra-low active current consumption of 66 μA/MHz.

Does the R5F100MJGFA#X0 include an integrated LIN physical layer or require an external transceiver?

The R5F100MJGFA#X0 does not integrate a LIN physical layer (PHY); however, its UART peripheral supports LIN protocol features including break detection, sync field generation, and PID checksum calculation. An external LIN transceiver (e.g., TLE7259-3GE) is required for bus-level signaling, but the R5F100MJGFA#X0 handles all protocol-layer functions in firmware or hardware-assisted mode.

What is the purpose and location of the flash library RAM area used by the R5F100MJGFA#X0?

The R5F100MJGFA#X0 reserves on-chip RAM at address FAF00H for the Flash Self-Programming Library (FSL), which manages data flash writes and code flash reprogramming. This 256-byte region is mandatory for safe self-programming operations and must be excluded from application use. Its location is fixed for all xJ-series RL78/G13 parts, including the R5F100MJGFA#X0.

How many analog input channels does the R5F100MJGFA#X0 support, and what ADC resolution is available?

The R5F100MJGFA#X0 supports up to 26 analog input channels with 10-bit resolution (also configurable for 8-bit mode). It includes internal references (1.45 V) and a factory-calibrated temperature sensor accessible via ANI2. All channels operate across the full 1.6–5.5 V supply range, enabling direct sensing from diverse analog sources without external signal conditioning.

Is the R5F100MJGFA#X0 pin-compatible with other RL78/G13 variants in the same 80-pin LQFP package?

Yes - the R5F100MJGFA#X0 shares identical pinout and electrical characteristics with all other RL78/G13 80-pin LQFP-0.65mm variants (e.g., R5F100MFAFA#V0, R5F100MLAFA#X0), including function mapping for I/O, peripherals, and power pins. This allows drop-in replacement within the same memory/peripheral configuration group, provided software accounts for differences in flash size, data flash presence, and RAM allocation.