Renesas R5F21345MNFP#50

Overview

R5F21345MNFP#50 from Renesas Electronics is a 16-bit R8C CPU core MCU with 24 KB flash program ROM, 2 KB RAM, and 4 KB data flash (1 KB × 4 blocks) supporting background operation (BGO). It operates at up to 20 MHz (VCC = 2.7–5.5 V), features 43 CMOS I/O ports with pull-up select, and integrates UART0/1/2, I²C, LIN, 10-bit × 12-channel ADC, dual 8-bit DACs, and six timer modules (RA–RE + RD dual-channel) - deployed in consumer audio equipment and office automation control systems.

For engineers reviewing the R5F21345MNFP#50 datasheet, R5F21345MNFP#50 pinout, R5F21345MNFP#50 application, or R5F21345MNFP#50 equivalent, key selection criteria include its N-version temperature range (−20°C to +85°C), 48-pin LQFP package (PLQP0048KB-A), on-chip high-speed/low-speed oscillators, voltage detection circuitry, and hardware LIN module timing compliance with ISO 9141-2.

Technical Context

The R5F21345MNFP#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 DTC (1 channel, 33 activation sources), real-time clock (Timer RE), four independent timer units (RA–RD) with PWM, input capture, and complementary output modes, plus dual UARTs with multiprocessor support and UART2 operating in I²C-bus mode.

Key Specifications

Pinout & Package

Package: 48-pin LQFP (PLQP0048KB-A), 0.5 mm pitch, 7 mm × 7 mm body, N-version (−20°C to +85°C).

Key Features

Applications

Equivalent & Alternatives

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

Compared with R5F21344MNFP, R5F21345MNFP#50 provides 8 KB more program storage and 0.5 KB additional RAM for enhanced feature sets; compared with R5F21345MDFP, it trades extended temperature rating for cost efficiency in commercial indoor environments.

Availability

R5F21345MNFP#50 is available at Aetrix Electronics and suitable for audio equipment control, office automation motor sequencing, consumer appliance UI panels, and industrial HVAC sensor nodes requiring stable component supply and long-term production continuity.

Supply support for R5F21345MNFP#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 is a global semiconductor leader specializing in microcontrollers, analog, power, and SoC solutions for automotive, industrial, and IoT markets.

The R8C/34M Group, including R5F21345MNFP#50, was designed for cost-sensitive, low-power embedded control in consumer electronics - emphasizing EMI/EMS robustness, integrated analog peripherals, and hardware-assisted communication protocols like LIN and I²C.

FAQ

What is the maximum operating frequency and supply voltage range for the R5F21345MNFP#50?

The R5F21345MNFP#50 supports a maximum operating frequency of 20 MHz at VCC = 2.7–5.5 V, and 5 MHz at VCC = 1.8–5.5 V. Its minimum supply voltage is 1.8 V, enabling compatibility with single-cell Li-ion or 3×AA battery systems when paired with appropriate regulators. The R5F21345MNFP#50 achieves this performance while maintaining EMI/EMS compliance across its full voltage range.

Does the R5F21345MNFP#50 support background operation (BGO) for data flash writes?

Yes, the R5F21345MNFP#50 includes 4 KB of data flash (1 KB × 4 blocks) with full background operation (BGO) support, allowing program execution to continue uninterrupted during flash erase or write cycles. This capability is essential for field firmware updates and runtime parameter storage in applications such as audio equipment calibration or HVAC sensor node configuration - all implemented directly within the R5F21345MNFP#50 without external memory.

How many hardware PWM channels does the R5F21345MNFP#50 provide, and which timers support them?

The R5F21345MNFP#50 delivers up to 11 hardware PWM outputs: Timer RB offers 1-channel programmable waveform generation; Timer RC supports 3-pin PWM output; Timer RD provides 6-pin complementary PWM (including reset-synchronous and triangular modulation modes). These are physically mapped to dedicated pins (e.g., TRBO, TRCIOx, TRDIOx) and require no CPU intervention once configured - making the R5F21345MNFP#50 suitable for precision motor and lighting control.

Is the R5F21345MNFP#50 pin-compatible with other members of the R8C/34M Group?

Yes, all R8C/34M Group MCUs - including R5F21344MNFP, R5F21345MNFP#50, and R5F21346MNFP - share identical 48-pin LQFP packaging (PLQP0048KB-A) and pin assignments. Memory size differences (16/24/32 KB ROM) and temperature grade (N/D) do not affect pinout or peripheral signal mapping, enabling scalable design reuse across product tiers while retaining the same PCB layout for the R5F21345MNFP#50.

What communication interfaces with hardware protocol acceleration does the R5F21345MNFP#50 integrate?

The R5F21345MNFP#50 integrates UART0/1/2 with multiprocessor mode, I²C-bus support (via UART2 or SSU), and a dedicated hardware LIN module compliant with ISO 9141-2. The LIN function uses Timer RA and UART0 resources internally - eliminating need for external LIN transceivers in automotive sub-nodes or appliance interconnects. All interfaces are register-configurable and support interrupt-driven operation, reducing CPU load in the R5F21345MNFP#50.