Renesas R5F1057AGNA#20

Overview

R5F1057AGNA#20 from Renesas is a 24-pin HWQFN-packaged 16-bit RL78/G11 microcontroller designed for ultra-low-power industrial embedded control. It integrates 16 KB flash, 2 KB data flash, 1.5 KB RAM, 11-channel 10-bit ADC, dual comparators, 2-channel 8-bit DAC, and supports 24 MHz operation with 33 DMIPS performance at 58.3 μA/MHz active current - ideal for battery-powered sensor nodes and motor control interfaces.

For engineers reviewing the R5F1057AGNA#20 datasheet, R5F1057AGNA#20 pinout, R5F1057AGNA#20 application, or R5F1057AGNA#20 equivalent, key selection criteria include its industrial-grade −40°C to +105°C temperature range, 24-pin HWQFN (4 × 4 mm, 0.50-mm pitch) package with exposed die pad, integrated event link controller (ELC) for low-latency peripheral triggering, and hardware DTC supporting 24 transfer sources without CPU intervention.

Technical Context

The R5F1057AGNA#20 implements the RL78 CISC CPU core with 3-stage pipeline, supporting instruction execution times from 0.04167 μs (24 MHz high-speed on-chip oscillator) to 66.6 μs (15 kHz low-speed mode). Its clock system includes selectable high-speed (up to 24 MHz), middle-speed (4/2/1 MHz), and low-speed (15 kHz) on-chip oscillators with ±1.0% accuracy over VDD = 1.8–5.5 V and TA = −20 to +85°C.

Peripheral integration centers on deterministic real-time response: the Event Link Controller (ELC) routes 18 event signals directly to peripherals (e.g., ADC start on timer match), while the Data Transfer Controller (DTC) handles up to 24 activation sources in normal, repeat, and block modes - enabling autonomous background data movement between ADC results, UART buffers, and RAM without CPU wake-up.

Key Specifications

Pinout & Package

Package: 24-pin HWQFN (4.0 × 4.0 mm, 0.50-mm pitch) with exposed die pad (recommended to connect to VSS). Pin count and function mapping confirmed per R01DS0282EJ0260 Rev.2.60 Figure 1.3.4 (Top View).

Key Features

Applications

Equivalent & Alternatives

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

Compared with R5F1058AGLA#U0 and R5F1056AGSM#10, the R5F1057AGNA#20 uniquely balances 24-pin HWQFN compactness, full 21 GPIO count, complete 4-channel CSI/I²C set, and industrial temperature rating - making it optimal for mid-complexity embedded controllers where layout area and peripheral headroom are both critical.

Availability

R5F1057AGNA#20 is available at Aetrix Electronics and suitable for industrial sensor nodes, smart HVAC actuators, programmable power monitors, and industrial keypad interfaces requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for R5F1057AGNA#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 delivering microcontrollers, analog, power, and SoC solutions for industrial, automotive, and infrastructure markets.

The RL78/G11 product line delivers true low-power 16-bit MCUs targeting cost-sensitive industrial control applications - emphasizing ultra-low active/sleep currents, integrated analog peripherals, and hardware accelerators (ELC/DTC) to minimize software overhead.

FAQ

What is the maximum operating frequency and corresponding DMIPS performance of the R5F1057AGNA#20?

The R5F1057AGNA#20 operates at up to 24 MHz using its high-speed on-chip oscillator, delivering 33 DMIPS performance. This is measured under standard conditions (VDD = 2.7–5.5 V, TA = −20 to +85°C) and reflects actual instruction throughput - not theoretical peak. The R5F1057AGNA#20 maintains this performance while consuming only 58.3 μA per MHz, making it suitable for compute-constrained yet power-sensitive applications.

Does the R5F1057AGNA#20 support hardware-based autonomous peripheral operation without CPU intervention?

Yes, the R5F1057AGNA#20 includes two dedicated hardware engines for autonomous operation: the Event Link Controller (ELC) routes 18 event sources directly to peripherals (e.g., starting ADC conversion on timer match), and the Data Transfer Controller (DTC) handles up to 24 transfer sources in normal, repeat, or block modes. Both operate independently of the CPU, allowing the R5F1057AGNA#20 to perform real-time data movement and peripheral coordination during HALT or STOP modes.

What analog features does the R5F1057AGNA#20 integrate for sensor interface applications?

The R5F1057AGNA#20 integrates an 11-channel 10-bit ADC with internal 1.45 V reference and temperature sensor, two 8-bit DACs (outputting 0–VDD), two comparators with window mode, and one programmable gain amplifier (PGA). These features enable direct connection of resistive sensors (thermistors, strain gauges), analog transducers, and precision voltage references - all without external signal conditioning components. The R5F1057AGNA#20's analog subsystem is fully functional across its −40°C to +105°C industrial temperature range.

Is the R5F1057AGNA#20 pin-compatible with other RL78/G11 variants such as the R5F1054AGNA or R5F1056AGSM?

No, the R5F1057AGNA#20 is not pin-compatible with R5F1054AGNA (16-pin HWQFN) or R5F1056AGSM (20-pin TSSOP). It uses a unique 24-pin HWQFN (4 × 4 mm, 0.50-mm pitch) package with 21 GPIO, whereas R5F1054AGNA has 13 GPIO in 16-pin format and R5F1056AGSM offers 17 GPIO in 20-pin format. Pin functions, counts, and physical layout differ significantly - PCB redesign is required when migrating to or from the R5F1057AGNA#20.

What development and debug capabilities are supported by the R5F1057AGNA#20?

The R5F1057AGNA#20 includes an on-chip debug interface compatible with Renesas E2 Emulator Lite and E2 studio IDE. It supports full break/watchpoint debugging, flash programming, and memory inspection. However, Renesas explicitly cautions against using the debug function in mass-produced devices due to potential flash endurance impact - the R5F1057AGNA#20's debug circuit is intended solely for development and evaluation, not field operation.