Renesas R5F21345CNFP#30

Overview

R5F21345CNFP#30 from Renesas is a 16-bit R8C CPU core MCU with 24 KB program flash, 2 KB RAM, and 4 KB data flash (1 KB × 4 blocks) supporting background operation (BGO). It delivers 50 ns minimum instruction execution at 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 - deployed in consumer audio and office equipment control subsystems.

For engineers reviewing the R5F21345CNFP#30 datasheet, R5F21345CNFP#30 pinout, R5F21345CNFP#30 application, or R5F21345CNFP#30 equivalent, key selection considerations include its 48-pin LQFP package, -20°C to +85°C operating range (N version), on-chip voltage detection (3 levels), low-power wait/stop modes (down to 2.0 µA), and integrated LIN physical layer support via UART0 and timer RA.

Technical Context

The R5F21345CNFP#30 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 program ROM at 0A000h–0FFFFh, data flash at 03000h–03FFFh, and RAM at 00400h–00BFFh.

Peripheral integration includes UART0/1/2 (with I²C mode on UART2), synchronous serial unit (SSU), hardware LIN (using UART0 + timer RA), 12-channel ADC with sample-and-hold and sweep mode, two independent 8-bit DACs, four programmable timer modules (RA–RD) plus real-time clock (RE), and DTC for autonomous data transfers - all managed via dedicated SFRs mapped to 0000h–002FFh and 02C00h–02FFFh.

Key Specifications

Pinout & Package

Package: 48-pin LQFP (PLQP0048KB-A), 7 mm × 7 mm, 0.5 mm pitch, 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 R5F21344CNFP, the R5F21345CNFP#30 offers 8 KB more program flash and 0.5 KB more RAM for enhanced feature sets, while R5F21345CDFP provides identical functionality with extended temperature qualification - making R5F21345CNFP#30 optimal for cost-sensitive consumer applications within standard industrial temperature limits.

Availability

R5F21345CNFP#30 is available at Aetrix Electronics and suitable for audio equipment control, office device UI management, and consumer appliance motor subsystems requiring stable component supply across multi-year production cycles.

Supply support for R5F21345CNFP#30 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/34C Group, including R5F21345CNFP#30, was designed for cost-effective, low-power embedded control in consumer electronics - emphasizing integrated analog peripherals, LIN connectivity, and robust EMI/EMS performance.

FAQ

What is the maximum operating frequency and corresponding supply voltage range for the R5F21345CNFP#30?

The R5F21345CNFP#30 supports a maximum operating frequency of 20 MHz at V_CC = 2.7–5.5 V, and 5 MHz at V_CC = 1.8–5.5 V. Minimum instruction execution time is 50 ns under the 20 MHz condition. This dual-frequency capability allows designers to balance performance and power consumption based on application requirements - for example, running at 20 MHz during active UI interaction and scaling down to 5 MHz during idle sensing phases.

Does the R5F21345CNFP#30 support in-system programming and debug interfaces?

Yes, the R5F21345CNFP#30 includes on-chip debug functionality and supports in-system programming via its on-board flash rewrite capability. It uses the single-wire debug interface compatible with Renesas E8/E8a emulators. The device also features ROM code protection and ID code check to prevent unauthorized firmware access - enabling secure development, field updates, and IP protection throughout the product lifecycle.

How many analog-to-digital converter channels does the R5F21345CNFP#30 integrate, and what is their resolution?

The R5F21345CNFP#30 integrates a 10-bit resolution analog-to-digital converter with 12 input channels (AN0–AN11). It includes sample-and-hold circuitry and supports sweep mode for automatic sequential conversion - allowing precise measurement of multiple sensor inputs (e.g., thermistors, potentiometers, current shunts) without CPU intervention, reducing firmware overhead in real-time control loops.

What peripheral resources enable LIN bus communication on the R5F21345CNFP#30?

The R5F21345CNFP#30 implements hardware LIN 2.1 compliance using UART0 combined with timer RA for baud rate generation and synchronization. This integrated LIN module eliminates the need for an external LIN transceiver in basic node applications such as automotive door modules or HVAC actuators - significantly reducing BOM count and PCB area while maintaining protocol compliance and error handling per LIN specification.

Is the R5F21345CNFP#30 pin-compatible with other members of the R8C/34C Group, such as R5F21346CNFP?

Yes, the R5F21345CNFP#30 is pin-compatible with all 48-pin LQFP variants in the R8C/34C Group, including R5F21344CNFP and R5F21346CNFP. They share identical PLQP0048KB-A packaging, I/O pin assignments, and peripheral signal mapping - enabling drop-in replacement during design iteration or production ramp, provided software accommodates differences in program ROM size (24 KB vs. 16 KB or 32 KB) and RAM capacity.