Renesas R5F51135ADFP#3A

Overview

R5F51135ADFP#3A from Renesas is a 32-bit RX CPU-based microcontroller operating at up to 32 MHz (50 DMIPS), featuring 128 KB on-chip flash, 32 KB SRAM, and 8 KB data flash. It integrates USB 2.0 full-speed host/function/OTG, 17-channel 12-bit A/D converter, 2-channel 12-bit D/A converter, LCD controller (40×4 SEG/COM), capacitive touch sensing (12 channels), RTC, and low-power software standby mode (0.44 µA). It targets embedded human-interface applications such as smart home control panels and industrial HMI displays.

For engineers reviewing the R5F51135ADFP#3A datasheet, R5F51135ADFP#3A pinout, R5F51135ADFP#3A application, or R5F51135ADFP#3A equivalent, key selection considerations include its 100-pin LFQFP package, −40 to +85°C temperature grade, integrated CTSU for touch buttons/sliders, USB OTG capability with BC support, and dual 12-bit DAC outputs for analog feedback generation.

Technical Context

The R5F51135ADFP#3A implements the RXv1 CPU core with Harvard architecture, five-stage pipeline, and variable-length instructions-enabling ultra-compact code and single-cycle 32×32-bit multiply. Its clock system includes high-speed on-chip oscillator (32 MHz ±1%), PLL, sub-clock (32.768 kHz), and USB-dedicated PLL (6/8 MHz), all managed via independent ICLK/PCLK/FCLK domains.

Peripheral coordination is handled by the Event Link Controller (ELC), enabling direct module-to-module triggering without CPU intervention-even during sleep modes-while the Data Transfer Controller (DTC) supports four transfer modes with interrupt-source-specific configuration and chain transfer capability.

Key Specifications

Pinout & Package

Package: PLQP0100KB-A - 100-pin Low-Profile Quad Flat Package (LFQFP), 14 mm × 14 mm, 0.5 mm pitch, exposed pad, RoHS-compliant (Sn only).

Key Features

Applications

Equivalent & Alternatives

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

Compared with R5F51135ADFP#3A, the R5F51136ADFP#3A offers scalable memory headroom while maintaining full peripheral compatibility, whereas the R5F51135ADFM#3A trades I/O count and integrated peripherals for compactness-making it suitable only where CTSU, LCD, and USB OTG are unnecessary.

Availability

R5F51135ADFP#3A is available at Aetrix Electronics and suitable for smart home control panels, industrial HMI displays, medical patient monitor UIs, and USB-powered sensor hubs requiring stable component supply across production lifecycles.

Supply support for R5F51135ADFP#3A 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, and power management solutions for industrial, automotive, and IoT applications.

The RX113 Group-including R5F51135ADFP#3A-is designed for cost-sensitive, low-power embedded UI applications requiring integrated touch, display, USB connectivity, and real-time control capabilities.

FAQ

What is the maximum operating frequency and voltage range for the R5F51135ADFP#3A?

The R5F51135ADFP#3A operates at up to 32 MHz when powered at 2.7–3.6 V, 16 MHz at 2.4–2.7 V, and 8 MHz at 1.8–2.4 V. It supports single-supply operation from 1.8 V to 3.6 V with no external level shifters required for its 5-V-tolerant GPIOs. The high-speed on-chip oscillator delivers 32 MHz ±1% accuracy over −40 to +85°C, eliminating need for external crystal in many timing-critical UI applications.

Does the R5F51135ADFP#3A support USB On-The-Go and Battery Charging detection?

Yes, the R5F51135ADFP#3A integrates a full USB 2.0 host/function/OTG module compliant with BC 1.2 specification. It detects proprietary charging ports (e.g., Apple, Samsung) via USB0_ID, USB0_VBUS, and USB0_EXICEN signals-enabling automatic charger identification and optimal current draw without external BC ICs. This functionality is fully supported in the R5F51135ADFP#3A's 100-pin LFQFP package.

How many capacitive touch channels does the R5F51135ADFP#3A support, and what methods are available?

The R5F51135ADFP#3A supports 12 capacitive touch sensing channels (TS0–TS11) via its integrated CTSU. It implements both self-capacitance (for button/slider detection) and mutual capacitance (for multi-touch and proximity) methods, with an on-chip noise canceller that suppresses 50/60 Hz interference and burst noise-enabling reliable operation in electrically noisy industrial environments without external filtering components.

What LCD configurations are supported by the R5F51135ADFP#3A's built-in controller/driver?

The R5F51135ADFP#3A's LCD controller supports two segment/common configurations: 40 segment × 4 common or 36 segment × 8 common. It includes an on-chip voltage boost circuit capable of generating up to 5 V from a 3.3 V supply, enabling direct drive of standard 5 V LCD panels. Contrast is adjustable via software, and blinking functions are hardware-supported-reducing CPU load during dynamic display updates.

Is the R5F51135ADFP#3A pin-compatible with other members of the RX113 Group?

The R5F51135ADFP#3A shares the same PLQP0100KB-A 100-pin LFQFP package and pinout with other RX113 Group devices in the 100-pin variant (e.g., R5F51136ADFP#3A, R5F51137ADFP#3A, R5F51138ADFP#3A), enabling drop-in memory upgrades. All share identical peripheral pin mappings-including USB0_DP/DM, CTSU TS pins, LCD SEG/COM outputs, and A/D inputs-allowing hardware reuse across firmware variants with differing flash/RAM capacities.