Renesas R5F2L35CMNFP#31

Overview

R5F2L35CMNFP#31 from Renesas Electronics is a 16-bit R8C CPU core MCU with 128 KB flash program memory, 10 KB RAM, and 4 KB data flash (4 × 1 KB blocks) supporting background operation (BGO). It delivers 50 ns minimum instruction execution at 20 MHz (VCC = 2.7–5.5 V), integrates a 16×16→32-bit hardware multiplier, and targets LCD-based consumer appliances requiring low EMI/EMS and integrated analog peripherals.

For engineers reviewing the R5F2L35CMNFP#31 datasheet, R5F2L35CMNFP#31 pinout, R5F2L35CMNFP#31 application, or R5F2L35CMNFP#31 equivalent, key selection criteria include its 52-pin LQFP package, 41 programmable I/O ports (5 high-current drive), 12-channel 10-bit ADC with sweep mode, dual 8-bit DACs, and LCD controller supporting up to 4 common / 24 segment outputs with 1/2 or 1/3 bias.

Technical Context

The R5F2L35CMNFP#31 implements the R8C CPU core with 89 fundamental instructions and single-chip 1 Mbyte address space. Its clock system includes XIN (up to 20 MHz), XCIN (32 kHz), high-speed on-chip oscillator (frequency-adjustable), and low-speed on-chip oscillator - all selectable via software-controlled frequency divider (1/1, 1/2, 1/4, 1/8, 1/16).

Peripheral integration includes Timer RA/RB (8-bit), Timer RC/RD (16-bit with PWM and capture/compare), Timer RE (real-time clock), LIN module (using Timer RA + UART0), UART0/UART1/UART2 (with I²C mode), SSU/I²C shared interface, DTC (1 channel, 38 activation sources), and voltage detection circuit with power-on reset and dual-level voltage monitoring.

Key Specifications

Pinout & Package

Package: 52-pin LQFP (PLQP0052JA-A, 0.65 mm pitch), RoHS-compliant, surface-mount compatible with standard reflow profiles.

Key Features

Applications

Equivalent & Alternatives

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

Compared with R5F2L358MNFP, the R5F2L35CMNFP#31 provides 64 KB more flash for feature-rich firmware and bootloader space; compared with R5F2L36CMNFP, it trades I/O and ADC scalability for compact 52-pin footprint and lower system cost in space-constrained panels.

Availability

R5F2L35CMNFP#31 is available at Aetrix Electronics and suitable for refrigerator control panels, printer status displays, audio front panels, smart thermostat interfaces, and other consumer electronics requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.

Supply support for R5F2L35CMNFP#31 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 devices for automotive, industrial, and IoT applications.

The R8C/L35M Group is designed for cost-sensitive, LCD-equipped consumer appliances requiring integrated analog peripherals, low EMI, and ultra-low standby power - emphasizing reliability and ease of certification.

FAQ

What is the maximum operating frequency and corresponding supply voltage range for the R5F2L35CMNFP#31?

The R5F2L35CMNFP#31 supports up to 20 MHz operation at VCC = 2.7–5.5 V, delivering a minimum instruction execution time of 50 ns. At reduced clock speeds (e.g., 5 MHz), it operates down to 1.8 V, enabling flexible power supply design across 3.3 V and 5 V systems. This dual-voltage capability ensures compatibility with legacy and modern power architectures.

Does the R5F2L35CMNFP#31 support in-system programming and data retention during firmware updates?

Yes, the R5F2L35CMNFP#31 supports on-board flash rewrite and background operation (BGO), allowing program memory or data flash to be reprogrammed while the main application continues running. Data flash endurance is rated at 10,000 erase/write cycles, ensuring reliable parameter storage across product lifetime in applications like calibration data logging.

How many analog-to-digital converter channels does the R5F2L35CMNFP#31 provide, and what resolution do they offer?

The R5F2L35CMNFP#31 integrates a 10-bit successive-approximation ADC with 12 input channels (AN0–AN11), including sample-and-hold and hardware sweep mode. All channels are accessible via P0 and P13 pins, enabling simultaneous sampling of multiple sensors - such as temperature, voltage, and potentiometer inputs - without external multiplexer circuitry.

Can the R5F2L35CMNFP#31 drive an LCD display directly, and what are its LCD interface limitations?

Yes, the R5F2L35CMNFP#31 includes a dedicated LCD controller supporting up to 4 common and 24 segment outputs with static, 1/2, or 1/3 bias configurations. It lacks VL3 and SEG52–SEG55 pins, so 1/4 bias and 1/8 duty cycle are not supported - limiting use to basic numeric or icon displays rather than high-segment graphical panels.

What low-power modes are available on the R5F2L35CMNFP#31, and what is the lowest achievable current consumption?

The R5F2L35CMNFP#31 offers wait, stop, and power-off modes. In power-off mode with Timer RE enabled, typical current draw is 1.4 µA at VCC = 3.0 V; with Timer RE disabled, it drops to 0.02 µA. These modes are controlled via software registers and support fast wake-up (< 10 µs from wait mode), making the device ideal for battery-powered or energy-harvesting consumer interfaces.