Renesas R5F100EHDNA#U0

Overview

R5F100EHDNA#U0 from Renesas is a 40-pin HWQFN-packaged 16-bit RL78/G13 microcontroller with 64 KB flash, 4 KB data flash, 4 KB RAM, 10-bit ADC (26 channels), and real-time clock - designed for battery-powered industrial sensors and low-power metering systems operating from 1.6 V to 5.5 V.

For engineers reviewing the R5F100EHDNA#U0 datasheet, R5F100EHDNA#U0 pinout, R5F100EHDNA#U0 application, or R5F100EHDNA#U0 equivalent, key selection criteria include ultra-low power consumption (66 μA/MHz active, 0.57 μA RTC+LVD mode), integrated data flash rewrite capability, and support for LIN-bus UART communication in compact 6 × 6 mm HWQFN.

Technical Context

The R5F100EHDNA#U0 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 integrates a high-accuracy ±1.0% on-chip oscillator and supports HALT/STOP/SNOOZE low-power modes.

Its peripheral set includes up to 16× 16-bit timers, 3× I²C interfaces, 4× UART/LIN channels, 2–4 DMA channels, and background operation (BGO) for concurrent code execution during data flash rewriting - enabling deterministic real-time response in resource-constrained embedded control.

Key Specifications

Pinout & Package

Package: 40-pin HWQFN (6 × 6 mm, 0.5 mm pitch), moisture sensitivity level (MSL) 3, lead-free and RoHS compliant.

Key Features

Applications

Equivalent & Alternatives

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

Compared with R5F100EHDNA#U0, R5F100EGDNA#U0 provides scalable memory for future firmware growth without PCB change, while R5F101EHDNA#U0 removes data flash to lower cost where external nonvolatile storage suffices - both retain identical pinout, timing, and peripheral compatibility.

Availability

R5F100EHDNA#U0 is available at Aetrix Electronics and suitable for smart metering, industrial sensor nodes, and home appliance control requiring stable component supply across extended product lifecycles.

Supply support for R5F100EHDNA#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 delivering 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 - emphasizing energy efficiency, integrated peripherals, and simplified development for battery-powered and industrial control systems.

FAQ

What is the maximum operating frequency and corresponding power consumption of the R5F100EHDNA#U0?

The R5F100EHDNA#U0 operates up to 32 MHz using its high-accuracy on-chip oscillator (±1.0% over −20°C to +85°C). At this frequency, active current is 66 μA/MHz - resulting in approximately 2.1 mA total at 32 MHz with all peripherals disabled. In STOP mode with only RTC and LVD active, it draws just 0.57 μA, enabling multi-year battery operation in metering applications.

Does the R5F100EHDNA#U0 support LIN bus communication, and which UART channel implements it?

Yes, the R5F100EHDNA#U0 supports LIN 2.2 protocol via its UART channels. Specifically, UART0 (mapped to P11 for RxD0 and P10 for TxD0/SCK00) is configured for LIN operation with built-in break detection, sync field handling, and checksum generation - enabling direct integration into automotive body electronics and industrial control networks without external transceivers.

How is data flash managed during runtime on the R5F100EHDNA#U0, and what is the guaranteed endurance?

The R5F100EHDNA#U0 provides 4 KB of data flash with guaranteed 1,000,000 write/erase cycles (typical). It supports background operation (BGO), allowing full CPU execution from program flash while data flash is being rewritten. The flash library reserves RAM starting at address FEF00H for self-programming operations - critical for implementing robust firmware update and parameter logging routines in the R5F100EHDNA#U0.

What packaging and thermal specifications apply to the R5F100EHDNA#U0?

The R5F100EHDNA#U0 uses a 40-pin HWQFN package measuring 6 × 6 mm with 0.5 mm pitch, rated for industrial temperature range (−40°C to +85°C). Its thermal resistance (θ_JA) is 40°C/W, and it complies with JEDEC MSL Level 3 moisture sensitivity - requiring bake before reflow if exposed beyond floor life. The package supports standard PCB assembly processes including reflow and AOI inspection.

Can the R5F100EHDNA#U0 operate from a 1.8 V supply, and what peripherals remain functional at that voltage?

Yes, the R5F100EHDNA#U0 supports operation from 1.6 V to 5.5 V. At 1.8 V, the RL78 core, 64 KB flash, 4 KB data flash, 4 KB RAM, 10-bit ADC (with internal 1.45 V reference), RTC, and all I/O ports (including N-ch open-drain outputs) remain fully functional. However, the high-speed on-chip oscillator is limited to ≤8 MHz below 2.7 V - so 1.8 V operation requires either lower-frequency clocking or an external crystal for 32 MHz performance.