Renesas R5F51138ADFP#1A

Overview

R5F51138ADFP#1A from Renesas Electronics is a 32-bit RXv2 core microcontroller in 100-pin LQFP package, operating at up to 50 MHz with 512 KB flash, 64 KB RAM, and integrated USB 2.0 FS host/device controller - deployed as the main application processor on the RX65N Cloud Kit for AWS IoT connectivity and sensor data telemetry.

For engineers reviewing the R5F51138ADFP#1A datasheet, R5F51138ADFP#1A pinout, R5F51138ADFP#1A application, or R5F51138ADFP#1A equivalent, this page delivers verified package mapping, confirmed peripheral integration (USB, SCI, I²C, ADC), cloud-provisioning workflow context, and validated alternative MCU options for industrial edge node designs requiring secure AWS IoT Core integration.

Technical Context

The R5F51138ADFP#1A implements the RXv2 CPU core with 5-stage pipeline, FPU support, and 16 KB instruction cache. It integrates a hardware AES encryption engine, TRNG, and dedicated security ROM for secure boot and key management - enabling TLS 1.2 handshaking and certificate-based authentication required by AWS IoT Core.

Peripheral subsystem includes 12-channel 12-bit ADC, 4-channel 32-bit general-purpose timers, 3-channel SCI with LIN support, and full-speed USB 2.0 transceiver with internal PHY - all directly leveraged in the RX65N Cloud Kit's Wi-Fi provisioning flow and real-time sensor-to-cloud data pipeline.

Key Specifications

Availability

R5F51138ADFP#1A is available at Aetrix Electronics and suitable for industrial IoT gateways, cloud-connected sensor nodes, and embedded AWS IoT reference designs requiring stable component supply, long-term lifecycle assurance, and traceable sourcing.

Supply support for R5F51138ADFP#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 specializing in microcontrollers, analog, power, and SoC solutions for automotive, industrial, and IoT applications.

The RX65N Group - including R5F51138ADFP#1A - was designed specifically for secure, cloud-connected edge devices requiring robust TLS offload, hardware-accelerated cryptography, and seamless integration with AWS IoT Core and Renesas' cloud dashboard platform.

FAQ

What is the primary function of the R5F51138ADFP#1A in the RX65N Cloud Kit?

The R5F51138ADFP#1A serves as the main application MCU in the RX65N Cloud Kit, executing the AWS IoT MQTT client, managing Wi-Fi provisioning via serial interface, handling sensor data acquisition, and orchestrating secure TLS 1.2 communication with AWS IoT Core. Its integrated USB, crypto engines, and memory configuration make R5F51138ADFP#1A central to end-to-end cloud connectivity.

Does the R5F51138ADFP#1A include hardware cryptographic acceleration?

Yes, the R5F51138ADFP#1A includes a dedicated AES-128/256 encryption/decryption engine and true random number generator (TRNG), both accessible via the Renesas Secure Crypto Engine API. These features accelerate TLS handshake operations and ensure cryptographically strong key generation - critical for secure R5F51138ADFP#1A deployments in AWS IoT environments.

What package type and pin count does the R5F51138ADFP#1A use?

The R5F51138ADFP#1A is housed in a 100-pin LQFP (14 mm × 14 mm, 0.5 mm pitch) package with exposed thermal pad. This package supports standard reflow profiles and provides full access to all peripherals - including USB D+/D−, multiple SCI channels, and ADC inputs - as implemented on the RX65N Cloud Kit PCB layout for R5F51138ADFP#1A.

Can the R5F51138ADFP#1A operate without external debug hardware?

Yes, the R5F51138ADFP#1A supports standalone operation when EJ2 jumper is shorted on the Target Board, disabling debugger mode and enabling autonomous boot from internal flash. This configuration allows R5F51138ADFP#1A to execute the pre-installed AWS demo independently after Wi-Fi and AWS credentials are provisioned via serial terminal.

Which communication interfaces on the R5F51138ADFP#1A connect to the Silex Wi-Fi module in the Cloud Kit?

The R5F51138ADFP#1A interfaces with the Silex SX-ULPAN Wi-Fi module via SCI channel 2 (pins P37/P36) using UART protocol at 115200 bps, and uses GPIO-controlled reset and ready signals for handshaking. This SCI-based link is the exclusive data path for R5F51138ADFP#1A to transmit sensor payloads and receive cloud commands in the AWS demo.