Renesas R5F104EDGNA#U0

Overview

R5F104EDGNA#U0 from Renesas is a 40-pin HWQFN-packaged 16-bit RL78/G14 microcontroller with 32 KB flash, 4 KB data flash, and 4 KB RAM, operating from 1.6–5.5 V at -40 to +105°C (industrial G-grade), delivering 44 DMIPS at 32 MHz for low-power embedded control in HVAC, motor drives, and industrial sensors.

For engineers reviewing the R5F104EDGNA#U0 datasheet, R5F104EDGNA#U0 pinout, R5F104EDGNA#U0 application, or R5F104EDGNA#U0 equivalent, key selection criteria include its 66 μA/MHz active current, RTC+LVD ultra-low-power STOP mode (0.60 μA), 10-bit 20-channel ADC, dual UART/LIN support, and hardware DTC/ELC for deterministic real-time peripheral coordination.

Technical Context

The R5F104EDGNA#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), and includes multiply/divide/accumulate instructions within a 1 MB address space. It integrates a configurable high-accuracy ±1.0% on-chip oscillator (1–64 MHz selectable).

Its peripheral set includes Timer Array Unit (TAU) with up to 8 channels, 12-bit interval timer, calendar-capable RTC with alarm/correction, watchdog timer, and event-driven architecture via Event Link Controller (ELC) linking 19–26 event sources to peripherals without CPU intervention.

Key Specifications

Pinout & Package

Package: 40-pin HWQFN (6 × 6 mm, 0.5 mm pitch) with exposed die pad recommended to be connected to VSS for thermal and electrical stability.

Key Features

Applications

Equivalent & Alternatives

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

Compared with R5F104EDGNA#U0, R5F104EGGNA#U0 provides 4× more flash and RAM for feature-rich firmware while maintaining identical footprint and power profile; R5F104LEGLA#U0 trades compact 40-pin packaging for scalable memory and I/O - critical for next-generation industrial gateways.

Availability

R5F104EDGNA#U0 is available at Aetrix Electronics and suitable for smart thermostats, industrial motor drives, and energy meters requiring stable component supply across extended product lifecycles.

Supply support for R5F104EDGNA#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 industrial, automotive, and IoT markets.

The RL78/G14 product line delivers true low-power performance (66 μA/MHz, 0.60 μA STOP) with rich analog/motor control peripherals, targeting cost-sensitive industrial and consumer embedded systems requiring long battery life and functional safety readiness.

FAQ

What is the maximum operating temperature specification for the R5F104EDGNA#U0?

The R5F104EDGNA#U0 is rated for industrial-grade operation from −40°C to +105°C, as indicated by the 'G' suffix in the part number. This extended temperature range ensures reliable performance in demanding environments such as motor control enclosures, outdoor metering units, and factory automation equipment where ambient heat buildup occurs.

Does the R5F104EDGNA#U0 support hardware-based real-time debugging?

Yes, the R5F104EDGNA#U0 supports hardware real-time debugging via dedicated pins P50 (TOOLRxD) and P51 (TOOLTxD), which provide asynchronous serial trace output and debug command input. These pins operate independently of application UARTs, enabling non-intrusive visibility into program flow, variable inspection, and breakpoint execution without affecting timing-critical tasks.

How many analog input channels does the R5F104EDGNA#U0 support, and what is their resolution?

The R5F104EDGNA#U0 supports up to 20 analog input channels with 10-bit resolution, as confirmed in the RL78/G14 datasheet section 1.1 Features. The ADC operates across the full 1.6–5.5 V supply range and includes an internal 1.45 V reference and integrated temperature sensor - eliminating external components for basic thermal monitoring and sensor interfacing.

Can the R5F104EDGNA#U0 execute code while rewriting data flash memory?

Yes, the R5F104EDGNA#U0 supports Background Operation (BGO) for data flash memory, allowing instruction execution from program memory during data flash erase/write cycles. This capability enables seamless firmware parameter updates or logging operations without halting real-time control tasks - critical for uninterrupted operation in industrial PLCs and smart sensors.

What oscillator options are available on the R5F104EDGNA#U0 for system clock generation?

The R5F104EDGNA#U0 integrates a high-accuracy on-chip oscillator tunable from 1 MHz to 64 MHz with ±1.0% tolerance across −20°C to +85°C and 1.8–5.5 V supply. It also supports external crystal (X1/X2) at 32.768 kHz for RTC or 1–20 MHz for main clock, plus external clock input (EXCLK) - providing flexible, low-BOM clocking for diverse timing requirements.