Renesas R5F21354CNFP#V2

Overview

R5F21354CNFP#V2 from Renesas Electronics is a 16-bit R8C CPU core microcontroller with 16 KB program flash, 1.5 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 (VCC = 2.7–5.5 V), integrates dual 8-bit timers (RA/RB), one 16-bit timer (RC), dual 16-bit timers (RD), real-time clock (RE), 10-bit × 12-channel ADC, dual 8-bit DACs, LIN hardware module, and UART/I²C/SSU serial interfaces. It targets cost-sensitive, low-power embedded control in consumer audio and appliance systems.

For engineers reviewing the R5F21354CNFP#V2 datasheet, R5F21354CNFP#V2 pinout, R5F21354CNFP#V2 application, or R5F21354CNFP#V2 equivalent, key selection considerations include its N-version temperature range (−20°C to +85°C), 52-pin LQFP package (PLQP0052JA-A), on-chip high-speed/low-speed oscillators, voltage detection circuitry, and integrated LIN physical layer support via UART0 and timer RA.

Technical Context

The R5F21354CNFP#V2 implements the R8C CPU core with 89 fundamental instructions, 16×16→32-bit hardware 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), watchdog timer (14-bit with selectable low-speed oscillator), comparator B (2 circuits), and LIN module using UART0 and timer RA for ISO 9141-2/KWP2000 compliance. Clock system supports XIN (up to 20 MHz), XCIN (32 kHz), and on-chip oscillators with programmable dividers (1/2/4/8/16).

Key Specifications

Pinout & Package

Package: 52-pin LQFP (PLQP0052JA-A), 10 mm × 10 mm body, 0.65 mm pitch, N-version (−20°C to +85°C operating ambient).

Key Features

Applications

Equivalent & Alternatives

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

Compared with R5F21354CNFP#V2, R5F21355CNFP offers expanded memory for complex connectivity stacks, while R5F21354CDFP provides guaranteed operation down to −40°C - both retain identical peripheral functionality and require no PCB layout changes.

Availability

R5F21354CNFP#V2 is available at Aetrix Electronics and suitable for audio equipment control, home appliance UI, office equipment motor control, and consumer audio DAC interface applications requiring stable component supply across long production lifecycles.

Supply support for R5F21354CNFP#V2 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 consumer markets.

The R8C/35C Group, including R5F21354CNFP#V2, was designed for cost-optimized, low-power embedded control in consumer electronics - emphasizing integrated analog peripherals, LIN support, and robust flash reliability for mass-market appliances and audio devices.

FAQ

What is the operating temperature range for R5F21354CNFP#V2?

The R5F21354CNFP#V2 is an N-version device rated for −20°C to +85°C operating ambient temperature. This range is validated per Renesas specification R01DS0006EJ0100 and suits indoor consumer electronics such as audio receivers and kitchen appliances. The D-version variant (R5F21354CDFP) extends lower to −40°C for industrial or automotive cabin applications.

Does R5F21354CNFP#V2 support in-system programming via standard interfaces?

Yes, R5F21354CNFP#V2 supports on-chip debug and in-system flash rewriting using the on-board debug interface. Programming is performed via the dedicated debug pins (not UART or SWD), and the background operation (BGO) function allows flash writes while application code continues executing - critical for field firmware updates without system interruption.

How many independent PWM outputs does R5F21354CNFP#V2 provide?

R5F21354CNFP#V2 provides up to 12 independent PWM outputs: Timer RC supports 3 pins in PWM mode; Timer RD supports 6 pins in standard PWM mode and an additional 3 pins in complementary PWM mode (totaling 6 active outputs in that configuration). All PWMs are configurable via dedicated registers (TRCMR, TRDCMR) and support dead-time insertion in complementary mode.

Can R5F21354CNFP#V2 operate without an external crystal?

Yes, R5F21354CNFP#V2 can operate using its internal high-speed on-chip oscillator (with frequency adjustment) or low-speed on-chip oscillator (32 kHz), eliminating the need for external crystals in cost-sensitive or space-constrained designs. External XIN/XOUT or XCIN/XCOUT connections remain optional for higher precision timing requirements.

What LIN protocol versions are supported by the hardware LIN module in R5F21354CNFP#V2?

The hardware LIN module in R5F21354CNFP#V2 implements ISO 9141-2 and KWP2000 physical layer compliance using UART0 and timer RA, as documented in Renesas datasheet R01DS0006EJ0100. It does not support LIN 2.x frame formatting or auto-baud detection in hardware - those layers must be implemented in firmware using the UART and timer resources.