Renesas R5F100GAANA#20

Overview

R5F100GAANA#20 from Renesas is a 48-pin HWQFN-packaged RL78/G13 16-bit microcontroller with 128 KB flash, 8 KB data flash, and 12 KB RAM, operating at 32 MHz (41 DMIPS), featuring ultra-low-power operation (66 μA/MHz active, 0.57 μA RTC+LVD mode), integrated 10-bit ADC (26 channels), RTC, and multiple serial interfaces - deployed in battery-powered industrial sensors and smart metering endpoints.

For engineers reviewing the R5F100GAANA#20 datasheet, R5F100GAANA#20 pinout, R5F100GAANA#20 application, or R5F100GAANA#20 equivalent, key selection criteria include its 48-pin HWQFN-0.5mm pitch package, industrial-grade temperature range (–40°C to +105°C), on-chip data flash rewrite endurance (1M cycles), real-time clock calendar function, and support for LIN-bus UART communication in low-voltage (1.6–5.5 V) systems.

Technical Context

The R5F100GAANA#20 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), and features a unified 1 MB address space with four register banks of eight 8-bit registers each.

It integrates dual power domains: main VDD (1.6–5.5 V) for full operation and dedicated low-speed oscillator for watchdog and RTC during STOP mode; includes hardware DMA (4 channels), 16×16/32÷32 multiplier/divider, and background data flash programming (BGO) enabling concurrent code execution and nonvolatile memory update.

Key Specifications

Pinout & Package

Package: 48-pin HWQFN (7 mm × 7 mm, 0.5 mm pitch), exposed thermal pad, RoHS-compliant, rated for –40°C to +105°C operation.

Key Features

Applications

Equivalent & Alternatives

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

Compared with R5F100GAANA#20, R5F100GJANA#20 offers scalable firmware headroom without layout change, while R5F101GAANA#20 reduces BOM cost by eliminating on-chip data flash - both maintain identical timing, power, and interface behavior for seamless migration.

Availability

R5F100GAANA#20 is available at Aetrix Electronics and suitable for smart metering, industrial sensor nodes, home appliance control panels, and automotive body electronics requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for R5F100GAANA#20 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 enterprise markets.

The RL78/G13 family delivers ultra-low-power 16-bit MCU performance for cost-sensitive, battery-operated, and thermally constrained applications - emphasizing energy efficiency, integrated analog, and functional safety readiness.

FAQ

What is the maximum operating frequency and corresponding DMIPS rating of the R5F100GAANA#20?

The R5F100GAANA#20 operates at up to 32 MHz with a measured performance of 41 DMIPS. This is achieved using the high-speed on-chip oscillator, which maintains ±1.0% accuracy across 1.8–5.5 V and –20°C to +85°C. The RL78 core's 3-stage pipeline and optimized instruction set deliver consistent throughput for real-time control tasks in the R5F100GAANA#20.

Does the R5F100GAANA#20 support LIN bus communication, and how is it implemented?

Yes, the R5F100GAANA#20 supports LIN bus communication through its UART peripherals, which include built-in LIN break detection, sync field processing, and checksum calculation. Two UART channels (e.g., UART0 and UART1) are LIN-capable, allowing the R5F100GAANA#20 to serve as either master or slave node in automotive body networks without external transceivers beyond standard LIN PHY.

What is the data flash endurance specification for the R5F100GAANA#20, and how is wear leveling managed?

The R5F100GAANA#20 provides 8 KB of data flash rated for 1,000,000 write/erase cycles (typical). Wear leveling is not handled automatically in hardware; instead, Renesas provides Flash Self-Programming Library (FSPL) APIs that enable firmware-level wear leveling, block management, and error recovery - essential for reliable parameter logging in the R5F100GAANA#20's data flash.

Can the R5F100GAANA#20 operate from a single 1.8 V supply, and what peripherals remain functional?

Yes, the R5F100GAANA#20 supports operation from 1.6 V to 5.5 V, so 1.8 V is fully within specification. At 1.8 V, all core functions, 10-bit ADC (with reduced input range), RTC, 16-bit timers, and UART/CSI/I²C interfaces remain operational. However, high-speed on-chip oscillator accuracy degrades slightly outside 2.7–5.5 V, and some I/O drive strength is reduced - verified per R01DS0131EJ0380 electrical characteristics tables for the R5F100GAANA#20.

What debug interface does the R5F100GAANA#20 use, and is JTAG supported?

The R5F100GAANA#20 uses Renesas' on-chip debug interface accessed via the FINE (Fast In-Circuit Emulator) protocol over a 2-pin cJTAG-compatible interface (pins P10 and P11). It does not support standard 4-wire JTAG; instead, it relies on the dedicated FINE debug circuitry, compatible with E2 emulator and CS+ IDE. This configuration enables minimal pin overhead and full breakpoint/watchpoint capability for the R5F100GAANA#20 during development.