Renesas R5F100GJGNA#U0

Overview

R5F100GJGNA#U0 from Renesas is a 48-pin HWQFN-packaged RL78/G13 16-bit microcontroller with 128 KB flash, 8 KB data flash, 12 KB RAM, and industrial-grade operation up to +105°C. It delivers 41 DMIPS at 32 MHz, consumes only 66 μA/MHz active and 0.57 μA in RTC+LVD mode, and integrates UART, I²C, SPI, 16-bit timers, 10-bit ADC (26 channels), and real-time clock - deployed in smart sensors and battery-powered industrial controls.

For engineers reviewing the R5F100GJGNA#U0 datasheet, R5F100GJGNA#U0 pinout, R5F100GJGNA#U0 application, or R5F100GJGNA#U0 equivalent, key selection criteria include its 48-pin HWQFN-0.5mm package, G-grade temperature range (−40°C to +105°C), integrated data flash with 1M rewrite cycles, low-power STOP/SNOOZE modes, and hardware multiplier/divider for deterministic control math.

Technical Context

The R5F100GJGNA#U0 implements the RL78 CPU core with 3-stage pipeline CISC architecture, supporting instruction execution times from 0.03125 μs (32 MHz high-speed mode) to 30.5 μs (32.768 kHz ultra-low-speed mode). Its memory subsystem includes 128 KB on-chip code flash (1 KB block size), 8 KB data flash with background operation (BGO), and 12 KB SRAM - all accessible within a 1 MB address space.

Peripherals are tightly coupled to low-power operation: the 10-bit ADC supports up to 26 analog inputs with internal 1.45 V reference and temperature sensor; the real-time clock provides calendar support (99 years), alarm, and clock correction; and the DMA controller supports 4-channel transfers with 2-clock latency between SFR and RAM - enabling efficient sensor data acquisition without CPU load.

Key Specifications

Pinout & Package

Package: 48-pin HWQFN (7 mm × 7 mm, 0.5 mm pitch), exposed thermal pad, RoHS-compliant, moisture sensitivity level 3.

Key Features

Applications

Equivalent & Alternatives

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

Compared with R5F100GJGNA#U0, R5F101GJGNA#U0 removes data flash to reduce cost and die size but retains full code flash and peripherals - making it viable for fixed-function control. R5F100GJGFB#V0 offers identical functionality in an LQFP package, easing PCB layout and soldering at the expense of thermal performance and board area.

Availability

R5F100GJGNA#U0 is available at Aetrix Electronics and suitable for smart metering, industrial sensor nodes, PLC I/O modules, and home appliance control systems requiring stable component supply across extended product lifecycles.

Supply support for R5F100GJGNA#U0 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 applications - balancing performance, integration, and energy efficiency for battery-operated and thermally constrained embedded systems.

FAQ

What is the maximum operating frequency and corresponding performance of the R5F100GJGNA#U0?

The R5F100GJGNA#U0 operates at up to 32 MHz, delivering 41 DMIPS of processing performance. This is achieved using the RL78 CPU core's 3-stage pipeline and high-speed on-chip oscillator with ±1.0% accuracy across VDD = 1.8–5.5 V and TA = −20°C to +85°C. The R5F100GJGNA#U0 maintains full peripheral functionality at this speed, including ADC sampling, UART transmission, and timer capture.

Does the R5F100GJGNA#U0 support in-system programming and secure firmware updates?

Yes, the R5F100GJGNA#U0 supports full in-system programming via its on-chip debug interface and includes flash shield window and boot swap functions. These features allow secure field updates by protecting designated flash regions and enabling atomic firmware replacement - critical for maintaining integrity in deployed R5F100GJGNA#U0-based devices like smart meters and industrial controllers.

How does the data flash memory in the R5F100GJGNA#U0 differ from standard code flash?

The R5F100GJGNA#U0 includes 8 KB of dedicated data flash memory optimized for frequent writes: it supports background operation (BGO), enabling code execution during erase/write cycles, and guarantees 1,000,000 write cycles at VDD = 1.8–5.5 V. Unlike code flash, data flash is organized for byte-aligned access and used for parameter storage, calibration data, and event logs - all managed by the R5F100GJGNA#U0's flash library.

What low-power modes are available on the R5F100GJGNA#U0, and what is the lowest achievable current draw?

The R5F100GJGNA#U0 offers HALT, STOP, and SNOOZE modes. In STOP mode with only RTC and LVD active, it draws just 0.57 μA - verified at VDD = 1.8–5.5 V and TA = −40°C to +105°C. This makes the R5F100GJGNA#U0 suitable for decade-long battery operation in remote sensors and utility meters where periodic wake-up is required.

Can the R5F100GJGNA#U0 interface directly with 1.8 V or 2.5 V peripherals?

Yes, the R5F100GJGNA#U0 supports different-potential interfaces: its I/O ports can be configured for 1.8 V, 2.5 V, or 3.0 V logic levels without external level shifters. This is enabled by independent VDD/VSS domains and configurable input buffers - allowing direct connection to low-voltage sensors, displays, or communication ICs while maintaining full 128 KB flash and 12 KB RAM operation at 32 MHz.