Renesas R5F2135CCNFP#50

Overview

R5F2135CCNFP#50 from Renesas Electronics is a 16-bit R8C CPU core MCU with 128 KB flash program ROM, 10 KB RAM, and 4 KB data flash (1 KB × 4 blocks) supporting background operation (BGO). It operates at up to 20 MHz (V_CC = 2.7–5.5 V), integrates dual 8-bit timers (RA/RB), dual 16-bit timers (RC/RD), real-time clock (RE), 10-bit × 12-channel ADC, dual 8-bit DACs, LIN hardware module, and I²C/UART/SSU serial interfaces. It targets embedded control in consumer audio equipment.

For engineers reviewing the R5F2135CCNFP#50 datasheet, R5F2135CCNFP#50 pinout, R5F2135CCNFP#50 application, or R5F2135CCNFP#50 equivalent, key selection criteria include its 52-pin LQFP package, -20°C to +85°C temperature grade (N version), on-chip debug support, BGO-enabled data flash for firmware updates during runtime, and integrated LIN transceiver logic requiring external transceiver.

Technical Context

The R5F2135CCNFP#50 implements the R8C CPU core with 89 fundamental instructions, 16×16→32-bit multiplier, and multiply-accumulate capability. Its memory map spans 1 Mbyte (00000h–FFFFFh), with fixed interrupt vector table at 0FFDCh–0FFFFh and data flash at 03000h–03FFFh.

Peripheral integration includes Timer RD with complementary PWM mode for three-phase motor control, UART2 with I²C-bus mode and multiprocessor communication, and a hardware LIN module using Timer RA and UART0. Clock sources comprise XIN/XOUT (up to 20 MHz), XCIN/XCOUT (32 kHz), high-speed on-chip oscillator (adjustable), and low-speed on-chip oscillator.

Key Specifications

Pinout & Package

Package: 52-pin LQFP (PLQP0052JA-A), 10 mm × 10 mm body, 0.65 mm pin pitch.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar 16-bit MCU applications.

Compared with R5F2135CCDFP, the R5F2135CCNFP#50 offers identical functionality at a commercial temperature grade, reducing cost where extended thermal range is unnecessary; versus R5F21358CNFP, it provides 64 KB more flash and 4 KB more RAM for complex control algorithms and larger data buffers-justified when firmware growth or future feature expansion is anticipated.

Availability

R5F2135CCNFP#50 is available at Aetrix Electronics and suitable for audio equipment, home appliance motor control, and office device power management requiring stable component supply across multi-year production cycles.

Supply support for R5F2135CCNFP#50 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 markets.

The R8C/35C Group, including R5F2135CCNFP#50, was designed for cost-effective, low-power embedded control in consumer electronics-emphasizing integrated analog peripherals, motor control timers, and communication interfaces to minimize external component count.

FAQ

What is the maximum operating frequency of the R5F2135CCNFP#50 and under what supply conditions?

The R5F2135CCNFP#50 achieves a maximum operating frequency of 20 MHz when supplied with V_CC = 2.7–5.5 V. At lower supply voltages (1.8–5.5 V), the guaranteed maximum frequency drops to 5 MHz. This dual-frequency specification allows designers to optimize performance versus power consumption based on system-level voltage regulation architecture.

Does the R5F2135CCNFP#50 include hardware support for LIN communication, and what external components are required?

Yes, the R5F2135CCNFP#50 integrates a dedicated hardware LIN module combining UART0 and Timer RA to handle LIN 2.x protocol framing and timing. However, it requires an external LIN transceiver (e.g., TLE6250 or MC33661) to drive the physical bus line, as the MCU itself does not include the differential driver/receiver circuitry.

How many analog-to-digital converter channels does the R5F2135CCNFP#50 support, and what is their resolution?

The R5F2135CCNFP#50 features a single 10-bit successive-approximation ADC with 12 input channels (AN0–AN11). It supports sample-and-hold operation and automatic channel sweep mode, enabling simultaneous sampling of multiple sensor inputs such as thermistors, potentiometers, and current-sense amplifiers in real-time control loops.

What is the purpose of the background operation (BGO) function in the R5F2135CCNFP#50's data flash, and how is it implemented?

The background operation (BGO) function in the R5F2135CCNFP#50 allows flash programming or erasure of data flash blocks (1 KB × 4) while the CPU continues executing application code from program ROM. It is implemented via dedicated flash control registers (FMRDYIC, FRAx) and interrupt flags, enabling safe over-the-air firmware updates or parameter reconfiguration without system interruption.

What package type and pin count does the R5F2135CCNFP#50 use, and is it compatible with standard PCB assembly processes?

The R5F2135CCNFP#50 uses a 52-pin LQFP package (PLQP0052JA-A) with 0.65 mm pin pitch and 10 mm × 10 mm body size. It is fully compatible with standard surface-mount assembly processes, including reflow soldering per J-STD-020, and supports automated optical inspection (AOI) and in-circuit testing (ICT) using industry-standard test fixtures.