Renesas R5F101GDDFB#X0

Overview

R5F101GDDFB#X0 from Renesas is a 48-pin LFQFP-packaged RL78/G13 16-bit microcontroller with 128 KB flash, 8 KB RAM, and no data flash memory, operating from 1.6 V to 5.5 V at up to 32 MHz (41 DMIPS), featuring ultra-low-power modes (0.57 μA RTC+LVD), 10-bit ADC (26 channels), and integrated real-time clock - deployed in industrial sensor nodes and battery-powered control modules.

For engineers reviewing the R5F101GDDFB#X0 datasheet, R5F101GDDFB#X0 pinout, R5F101GDDFB#X0 application, or R5F101GDDFB#X0 equivalent, key selection criteria include its industrial-grade temperature range (–40°C to +105°C), absence of on-chip data flash, LFQFP-48 7×7 mm 0.5-mm pitch package, and compatibility with Renesas' RL78 toolchain and E2 studio IDE.

Technical Context

The R5F101GDDFB#X0 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 subsystem clock). It integrates dual serial interfaces (CSI, UART/LIN, I²C), 16-bit timers (up to 16 channels), and hardware multiplier/divider for embedded control math.

Its power management includes HALT, STOP, and SNOOZE low-power modes, on-chip POR and LVD (14-level selectable), and background operation for flash self-programming. The device lacks data flash but retains full code flash self-programming capability with boot swap and flash shield window functions.

Key Specifications

Pinout & Package

Package: 48-pin LFQFP (7 mm × 7 mm, 0.5 mm pitch), 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 R5F100GDDFB#X0, the R5F101GDDFB#X0 saves board area by omitting data flash circuitry while retaining identical timing, power, and interface performance; versus R5F101GDDFP#X0, it provides 7 additional I/O pins and larger package thermal mass for higher ambient stability.

Availability

R5F101GDDFB#X0 is available at Aetrix Electronics and suitable for industrial motor control, smart metering, wireless sensor networks, and programmable logic controller I/O modules requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for R5F101GDDFB#X0 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 product line delivers true low-power 16-bit MCUs optimized for cost-sensitive industrial and consumer applications demanding high integration, robustness, and energy efficiency - especially where extended battery life and wide temperature operation are critical.

FAQ

What is the maximum operating frequency and corresponding DMIPS rating for the R5F101GDDFB#X0?

The R5F101GDDFB#X0 operates at up to 32 MHz with a measured performance of 41 DMIPS. This rating reflects its RL78 CPU core's 3-stage pipeline efficiency and is validated under typical industrial conditions (VDD = 3.3 V, TA = 25°C). The R5F101GDDFB#X0 achieves this without external acceleration blocks, making it suitable for deterministic real-time control tasks where cycle predictability matters.

Does the R5F101GDDFB#X0 include on-chip data flash memory?

No, the R5F101GDDFB#X0 does not include on-chip data flash memory. As indicated by the "101" prefix in its part number per Renesas' RL78/G13 naming convention, it provides 128 KB of code flash only. For applications requiring non-volatile parameter storage or firmware update capability, the pin-compatible R5F100GDDFB#X0 (with 8 KB data flash) is the direct alternative.

What is the industrial temperature grade supported by the R5F101GDDFB#X0?

The R5F101GDDFB#X0 is rated for industrial operation from –40°C to +105°C, denoted by the "G" suffix in its ordering code. This grade meets extended thermal requirements for enclosed industrial drives, outdoor metering equipment, and factory automation controllers where ambient temperatures exceed standard commercial limits.

Which debug interface does the R5F101GDDFB#X0 support, and what pins are required?

The R5F101GDDFB#X0 supports single-wire debug (SWD) using the dedicated SWDIO and SWCLK pins (P00 and P01 by default, configurable via option byte). No JTAG header is needed, reducing PCB footprint and test point count. Debug access remains fully functional across all low-power modes except deep STOP, enabling robust development and field diagnostics for the R5F101GDDFB#X0.

Can the R5F101GDDFB#X0 drive 5 V-tolerant I/Os directly, and which pins support this?

Yes, the R5F101GDDFB#X0 supports N-ch open-drain I/Os with 6 V tolerance on specific pins including P00–P07 and P10–P17 (as defined in the datasheet pin function table). These pins can interface directly with 5 V logic without external level shifters, provided the internal pull-up is disabled and external pull-ups are used. This capability simplifies mixed-voltage system design for the R5F101GDDFB#X0.