Renesas R5F104LEAFP#50

Overview

R5F104LEAFP#50 from Renesas is a 48-pin LQFP-packaged RL78/G14 16-bit microcontroller with 48 KB flash, 5.5 KB RAM, and 10-bit ADC (20-channel), operating from 1.6–5.5 V at -40°C to +85°C for industrial control, sensor nodes, and appliance HMI.

For engineers reviewing the R5F104LEAFP#50 datasheet, R5F104LEAFP#50 pinout, R5F104LEAFP#50 application, or R5F104LEAFP#50 equivalent, key selection criteria include ultra-low power operation (66 μA/MHz), integrated RTC + LVD, 4-channel UART/LIN support, and hardware DTC/ELC for deterministic peripheral event handling in resource-constrained embedded systems.

Technical Context

The R5F104LEAFP#50 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 includes multiply/divide/accumulate instructions. Its memory subsystem integrates 48 KB code flash (1 KB blocks), 4 KB data flash (1M rewrite cycles), and 5.5 KB on-chip RAM.

Peripherals include 8× 16-bit timers (TAU, RJ, RD, RG), 1× real-time clock with calendar/alarm, 1× watchdog timer, 20-channel 10-bit ADC with internal reference and temperature sensor, 2× 8-bit DAC outputs, and serial interfaces: up to 4× UART/LIN, 10× I²C, and 8× CSI (SPI-compatible). Event Link Controller (ELC) enables direct peripheral-to-peripheral signal routing without CPU intervention.

Key Specifications

Pinout & Package

Package: 48-pin LQFP (7 × 7 mm, 0.5 mm pitch), lead-free, RoHS-compliant.

Key Features

Applications

Equivalent & Alternatives

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

Compared with R5F104LEAFP#50, the R5F104LEAFB#50 offers identical electrical and functional behavior in an alternate 48-pin LFQFP package-ideal for thermal management-while R5F104LGAFP#50 provides scalable memory headroom (128 KB flash/12 KB RAM) without altering pinout or peripheral configuration.

Availability

R5F104LEAFP#50 is available at Aetrix Electronics and suitable for industrial control systems, smart appliance HMI, and battery-powered sensor nodes requiring stable component supply and long-term lifecycle support.

Supply support for R5F104LEAFP#50 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/G14 product line delivers true low-power 16-bit MCUs optimized for cost-sensitive, energy-efficient embedded applications requiring rich analog integration and deterministic real-time response.

FAQ

What is the maximum operating frequency and corresponding DMIPS rating for the R5F104LEAFP#50?

The R5F104LEAFP#50 operates at up to 32 MHz with a measured performance of 44 DMIPS. This value is derived from the RL78 CPU core's 3-stage pipeline architecture and instruction mix efficiency. The high-speed on-chip oscillator supports selectable frequencies from 1 to 64 MHz, with ±1.0% accuracy across 1.8–5.5 V and -20°C to +85°C. At 32 MHz, minimum instruction time is 0.03125 µs.

Does the R5F104LEAFP#50 support in-system programming and secure firmware updates?

Yes, the R5F104LEAFP#50 supports in-system programming via its on-chip debug interface using single-wire SWD. It includes flash shield window protection to prevent unauthorized read-out of code memory, block-level erase/write prohibition for security-critical sections, and boot swapping for safe firmware updates. Self-programming is enabled with background operation (BGO) on data flash, allowing uninterrupted application execution during rewrites.

How many analog input channels and what ADC resolution does the R5F104LEAFP#50 provide?

The R5F104LEAFP#50 integrates a 10-bit successive-approximation ADC with up to 20 analog input channels (ANI0–ANI19). It supports internal reference voltage (1.45 V) and includes an on-chip temperature sensor. Conversion is compatible with VDD = 1.6–5.5 V, enabling direct measurement across the full supply range without external references. Input channels are mapped to physical pins P20–P27, P120–P122, P146–P147, and P10–P17 depending on configuration.

What serial communication interfaces are available on the R5F104LEAFP#50 and how are they configured?

The R5F104LEAFP#50 provides 4 UART/LIN channels, up to 10 I²C/simplified I²C channels, and up to 8 CSI (SPI-compatible) channels. These are implemented via shared pin resources (e.g., P10–P17, P60–P62) and assigned through peripheral I/O redirection registers (PIOR0/1). UART supports LIN 2.2 compliance including sync byte detection and checksum generation; I²C supports standard/fast-mode; CSI supports master/slave modes with programmable clock polarity and phase.

What power-saving modes are supported by the R5F104LEAFP#50 and what is the lowest current consumption achievable?

The R5F104LEAFP#50 supports HALT, STOP, and SNOOZE modes. In STOP mode with only RTC and LVD active, it achieves 0.60 μA typical current consumption. HALT mode draws 66 μA/MHz, scaling linearly with active clock frequency. SNOOZE mode allows selected peripherals (e.g., ADC, UART) to operate while CPU remains halted, reducing dynamic power without full wake-up latency. All modes retain RAM content and register states.