Renesas R5F2135ACNFP#V0

Overview

R5F2135ACNFP#V0 from Renesas is a 16-bit R8C CPU core MCU with 96 KB flash program ROM, 8 KB data flash (4 × 1 KB blocks), and 8 KB RAM, operating at up to 20 MHz (V_CC = 2.7–5.5 V). It integrates UART0/1/2, I²C, SSU, LIN hardware module, 10-bit × 12-channel ADC, dual 8-bit DACs, and six timer units (RA–RE + RD dual 16-bit) for motor control and real-time clock functions in consumer appliance control systems.

For engineers reviewing the R5F2135ACNFP#V0 datasheet, R5F2135ACNFP#V0 pinout, R5F2135ACNFP#V0 application, or R5F2135ACNFP#V0 equivalent, key selection criteria include its 52-pin LQFP package, -20°C to +85°C N-version temperature grade, background operation (BGO) for data flash, low-power wait/stop modes (down to 2.0 µA), and integrated LIN transceiver support via UART0 + Timer RA.

Technical Context

The R5F2135ACNFP#V0 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 three UART channels (UART2 supports I²C mode), one SSU shared with I²C bus, hardware LIN using UART0 and Timer RA, and Timer RD supporting complementary PWM for three-phase motor drive with 6-pin output and triangular/sawtooth wave modulation.

Key Specifications

Pinout & Package

52-pin LQFP package (PLQP0052JA-A), 10 mm × 10 mm body, 0.65 mm lead pitch, exposed pad not specified. Pin functions include 47 CMOS I/O ports (with selectable pull-up), 1 input-only port (P4_2), and dedicated peripheral pins for UART, LIN, timers, ADC, DAC, and clock generation.

Key Features

Applications

Equivalent & Alternatives

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

Compared with R5F2135ACDFP, the R5F2135ACNFP#V0 offers identical functionality at lower cost and qualification for commercial temperature range; versus R5F21358CNFP, it provides 32 KB more flash and 2 KB more RAM for complex UI or connectivity stacks without changing PCB layout.

Availability

R5F2135ACNFP#V0 is available at Aetrix Electronics and suitable for home appliance control, audio equipment interface, office equipment motor drive, and consumer device real-time clock applications requiring stable component supply and long-term production continuity.

Supply support for R5F2135ACNFP#V0 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, power, and SoC solutions for automotive, industrial, and consumer markets.

The R8C/35C Group, including R5F2135ACNFP#V0, was designed for cost-effective, low-power embedded control in consumer electronics-emphasizing integrated peripherals (LIN, ADC, DAC, timers), flash flexibility (BGO), and robust EMI/EMS performance.

FAQ

What is the maximum operating frequency of the R5F2135ACNFP#V0 and under what voltage conditions?

The R5F2135ACNFP#V0 operates at a maximum frequency of 20 MHz when supplied with V_CC = 2.7–5.5 V and using the XIN clock source. At lower voltages (1.8–5.5 V), the maximum frequency reduces to 5 MHz. The high-speed on-chip oscillator supports adjustable frequencies and enables clock source redundancy without external components.

Does the R5F2135ACNFP#V0 support in-system programming of its data flash memory?

Yes, the R5F2135ACNFP#V0 supports background operation (BGO) for data flash, allowing erase and write operations to execute concurrently with CPU program execution. This enables safe firmware updates and parameter storage without interrupting real-time application tasks.

How many UART interfaces does the R5F2135ACNFP#V0 integrate, and what additional protocols do they support?

The R5F2135ACNFP#V0 integrates three UART modules: UART0 and UART1 operate in standard UART or clock-synchronous serial I/O mode, while UART2 adds I²C-bus mode and multiprocessor communication capability. UART2's dual-mode operation allows flexible peripheral interfacing without requiring dedicated I²C hardware.

What is the purpose of the TREO pin on the R5F2135ACNFP#V0, and which timer drives it?

The TREO pin (Pin 51) is the output for Timer RE, an 8-bit real-time clock module. It delivers a divided clock signal (e.g., 1 Hz, 60 Hz) derived from the 32 kHz XCIN crystal, enabling accurate timekeeping for calendar functions, alarm triggers, or periodic wake-up events in low-power modes.

Can the R5F2135ACNFP#V0 generate complementary PWM waveforms for three-phase motor control?

Yes, Timer RD in the R5F2135ACNFP#V0 supports complementary PWM mode with six output pins (TRDIOA0–TRDIOC1), synchronous reset, and triangular/sawtooth wave modulation. This enables direct driving of three-phase inverter bridges with dead-time control and fault protection integration.