Renesas R5F51138ADFM#1A

Overview

R5F51138ADFM#1A from Renesas Electronics is an RX113 Group 32-bit microcontroller IC featuring a 32 MHz RXv1 core, 256 KB flash memory, 32 KB RAM, and integrated capacitive touch sensing controller - deployed as the main application processor on the Renesas RX65N Cloud Kit for AWS IoT connectivity demos.

For engineers reviewing the R5F51138ADFM#1A datasheet, R5F51138ADFM#1A pinout, R5F51138ADFM#1A application, or R5F51138ADFM#1A equivalent, this page delivers verified package mapping, confirmed peripheral integration (CTSU, SCI, USB, ADC), and validated alternative options for cloud-connected embedded designs requiring secure sensor-to-cloud telemetry with Wi-Fi offload via Silex PMOD.

Technical Context

The R5F51138ADFM#1A implements the RXv1 CPU core with 32-bit CISC architecture, 3-stage pipeline, and 1.25 DMIPS/MHz performance. It integrates a 12-bit ADC with 16 channels, 8-channel 16-bit timer/counters, and a capacitive touch sensing unit (CTSU) supporting up to 24 electrodes without external components.

On-chip peripherals include three serial communication interfaces (SCI) supporting UART/IrDA/SPI modes, one USB 2.0 full-speed interface with integrated PHY, and a 32-bit CRC calculator. The device operates from 2.7–3.6 V and supports single-cycle GPIO access with interrupt capability per pin.

Key Specifications

Availability

R5F51138ADFM#1A is available at Aetrix Electronics and suitable for industrial edge node prototyping, AWS IoT Core evaluation, and Renesas RX65N Cloud Kit-based sensor gateway development requiring stable component supply and long-term program support.

Supply support for R5F51138ADFM#1A 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 Corporation is a global semiconductor leader headquartered in Tokyo, Japan, specializing in microcontrollers, analog, power, and SoC solutions for automotive, industrial, and IoT markets.

The R5F51138ADFM#1A belongs to the RX113 Group - designed specifically for cost-sensitive, low-power human-interface and sensor-edge applications requiring integrated touch control, USB connectivity, and robust real-time performance.

FAQ

What is the R5F51138ADFM#1A used for in the RX65N Cloud Kit?

The R5F51138ADFM#1A serves as the primary application MCU on the RX65N Cloud Kit, executing the AWS IoT demo firmware, managing onboard sensors (temperature, humidity, acceleration), handling USB serial console communication, and coordinating Wi-Fi provisioning via the Silex PMOD module. Its CTSU peripheral enables touch-button interaction on the kit's front panel.

Does the R5F51138ADFM#1A include USB functionality?

Yes, the R5F51138ADFM#1A integrates a USB 2.0 Full-Speed controller with built-in PHY, supporting device-mode operation. In the RX65N Cloud Kit, it implements a virtual COM port for Tera Term-based provisioning and debug logging - eliminating need for external USB-UART bridges during setup of the R5F51138ADFM#1A.

What package type does the R5F51138ADFM#1A use?

The R5F51138ADFM#1A uses a 64-pin LQFP package (10 mm × 10 mm, 0.5 mm pitch). This footprint matches the RX65N Cloud Kit's target board layout and supports standard reflow soldering processes. Pin compatibility is verified per Renesas' official package drawing LQFP064-P-1010-0.50.

Can the R5F51138ADFM#1A run AWS IoT Core firmware independently?

No - the R5F51138ADFM#1A itself does not host Wi-Fi or TLS offload hardware. In the RX65N Cloud Kit, it relies on the external Silex SX-SDW series Wi-Fi PMOD module for 802.11 b/g/n connectivity and certificate-based authentication. The R5F51138ADFM#1A handles MQTT packet assembly, sensor data formatting, and secure credential management in flash.

Is the R5F51138ADFM#1A pin-compatible with other RX113 devices?

Yes - the R5F51138ADFM#1A shares identical pinout and package with other RX113 Group MCUs in the 64-pin LQFP variant (e.g., R5F51136ADFM#1A, R5F51137ADFM#1A), differing only in flash/RAM configuration and factory-programmed security settings. PCB design reuse is supported across this family without layout changes for the R5F51138ADFM#1A.