Renesas R5F101EHDNA#U0

Overview

R5F101EHDNA#U0 from Renesas is a 40-pin HWQFN-packaged RL78/G13 16-bit microcontroller with 64 KB flash, 4 KB data flash, 2 KB RAM, 10-bit ADC (26 channels), and real-time clock - designed for ultra-low-power industrial sensor nodes and battery-powered control systems operating from 1.6 V to 5.5 V.

For engineers reviewing the R5F101EHDNA#U0 datasheet, R5F101EHDNA#U0 pinout, R5F101EHDNA#U0 application, or R5F101EHDNA#U0 equivalent, key selection criteria include its 0.57 μA STOP-mode current, 66 μA/MHz active power, integrated LVD with 14-level detection, hardware DMA (2-channel), and support for LIN-bus UART communication in compact 6 × 6 mm footprint.

Technical Context

The R5F101EHDNA#U0 implements the RL78 CPU core with 3-stage pipeline, supporting instruction execution times from 0.03125 μs (@32 MHz) to 30.5 μs (@32.768 kHz), and features an on-chip high-accuracy ±1.0% oscillator (1–32 MHz selectable). It integrates a 12-bit interval timer, watchdog timer, and calendar-based RTC with alarm and clock correction.

Its peripheral set includes up to 26-channel 10-bit ADC with internal 1.45 V reference and temperature sensor, 8× 16-bit timers, 3× I²C/Simplified I²C interfaces, 2× UART/LIN channels, and 2× CSI (SPI-compatible) serial interfaces - all configurable via dedicated SFRs without external components.

Key Specifications

Pinout & Package

Package: 40-pin HWQFN (6 × 6 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 16-bit microcontroller applications.

Compared with R5F100EHDNA#U0, the R5F101EHDNA#U0 trades RAM capacity for lower cost and optimized BOM in resource-constrained designs; versus RL78/G14, it offers proven industrial reliability in smaller form factor at lower power, without DAC or extended peripherals.

Availability

R5F101EHDNA#U0 is available at Aetrix Electronics and suitable for smart utility metering, industrial sensor nodes, home appliance control, and building automation panels requiring stable component supply across multi-year production cycles.

Supply support for R5F101EHDNA#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 product line delivers ultra-low-power 16-bit MCUs targeting cost-sensitive industrial and consumer applications where battery life, code density, and peripheral integration are critical.

FAQ

What is the maximum operating frequency of the R5F101EHDNA#U0?

The R5F101EHDNA#U0 supports up to 32 MHz operation using the on-chip high-speed oscillator, with minimum instruction execution time of 0.03125 μs. External clock input (EXCLK) accepts up to 20 MHz, and the subsystem clock runs at 32.768 kHz for RTC and ultra-low-power modes. All timing specifications are validated across −40°C to +85°C.

Does the R5F101EHDNA#U0 include a hardware multiplier/divider?

Yes, the R5F101EHDNA#U0 integrates a hardware multiplier and divider unit supporting 16 × 16 → 32-bit (signed/unsigned), 32 ÷ 32 → 32-bit (unsigned), and 16 × 16 + 32 → 32-bit (signed/unsigned) operations. This accelerates math-intensive tasks like PID control, sensor linearization, and FFT preprocessing without CPU overhead.

Can the R5F101EHDNA#U0 operate from a 1.8 V supply?

Yes, the R5F101EHDNA#U0 operates across 1.6 V to 5.5 V, fully functional at 1.8 V. At this voltage, maximum frequency is reduced to 16 MHz per datasheet limits, and ADC accuracy remains specified with internal 1.45 V reference. I/O pins support direct interfacing with 1.8 V logic without level shifters.

Is there a built-in temperature sensor in the R5F101EHDNA#U0?

Yes, the R5F101EHDNA#U0 includes an on-chip temperature sensor accessible via the 10-bit ADC (channel ANI22). It is factory-calibrated and usable in HS (high-speed main) mode only. Typical accuracy is ±3°C over −40°C to +85°C, enabling ambient temperature monitoring in thermostats and motor controllers.

What debug interface does the R5F101EHDNA#U0 support?

The R5F101EHDNA#U0 supports on-chip debugging via the single-wire debug (SWD)-compatible interface using pins P11 (TOOLRxD) and P12 (TOOLTxD). It enables full breakpoint, watchpoint, and memory access capabilities through Renesas E2 emulator or compatible JTAG/SWD tools - no external debug header required.