Renesas R5F21356CDFP#X6

Overview

R5F21356CDFP#X6 from Renesas Electronics is a 16-bit R8C CPU core MCU with 32 KB flash program ROM, 2.5 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 47 CMOS I/O ports with pull-up select, and integrates UART0/1/2, I²C, LIN, 10-bit × 12-channel ADC, dual 8-bit DAC, and six timer modules including complementary PWM-capable Timer RD for motor control in consumer appliance power stages.

For engineers reviewing the R5F21356CDFP#X6 datasheet, R5F21356CDFP#X6 pinout, R5F21356CDFP#X6 application, or R5F21356CDFP#X6 equivalent, key selection criteria include its -40°C to +85°C industrial temperature rating (D version), 52-pin LQFP package with 0.65 mm pitch, integrated voltage detection (VDD = 1.8–5.5 V), low-power wait/stop modes (down to 2.0 µA), and hardware LIN module using Timer RA and UART0.

Technical Context

The R5F21356CDFP#X6 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.

It supports four clock sources: XIN/XOUT (up to 20 MHz), XCIN/XCOUT (32 kHz), high-speed on-chip oscillator (adjustable), and low-speed on-chip oscillator. Clock division (1/2/4/8/16) and oscillation stop detection are built-in, enabling robust timing control across operating modes including standard, wait, and stop.

Key Specifications

Pinout & Package

Package: 52-pin LQFP (PLQP0052JA-A), 10 mm × 10 mm body, 0.65 mm lead pitch, exposed pad not specified.

Key Features

Applications

Equivalent & Alternatives

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

Compared with R5F21356CNFP, the R5F21356CDFP#X6 adds industrial temperature tolerance without changing pinout or software compatibility; compared with R5F21357CDFP, it trades ROM/RAM capacity for lower cost and smaller footprint in resource-constrained designs.

Availability

R5F21356CDFP#X6 is available at Aetrix Electronics and suitable for home appliance motor control, industrial sensor nodes, audio equipment power management, and office equipment keypad interfaces requiring stable component supply and long-term production continuity.

Supply support for R5F21356CDFP#X6 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 delivering microcontrollers, analog, power, and SoC solutions for automotive, industrial, and IoT markets.

The R8C/35C Group, including R5F21356CDFP#X6, was designed for cost-sensitive, low-power embedded control in consumer and industrial equipment where integration of motor control, communication, and analog functions reduces system complexity.

FAQ

What is the maximum operating frequency and supply voltage range for the R5F21356CDFP#X6?

The R5F21356CDFP#X6 operates at up to 20 MHz when supplied with 2.7–5.5 V, and supports reduced-frequency operation down to 5 MHz at 1.8 V. This dual-voltage capability allows flexible power design across battery-powered and line-powered applications while maintaining full peripheral functionality across the entire 1.8–5.5 V range.

Does the R5F21356CDFP#X6 support in-system programming and background operation?

Yes, the R5F21356CDFP#X6 supports background operation (BGO) on its 4 KB data flash (1 KB × 4 blocks), allowing program execution from main ROM while erasing or writing data flash. This enables safe firmware updates and parameter storage without halting real-time control tasks - a critical feature for uninterrupted operation in motor control and sensor applications.

What peripheral interfaces are integrated into the R5F21356CDFP#X6?

The R5F21356CDFP#X6 integrates UART0/1/2 (with I²C mode on UART2), synchronous serial I/O (SSU), hardware LIN module (using UART0 and Timer RA), 10-bit × 12-channel ADC with sample-and-hold, dual 8-bit DAC outputs (DA0/DA1), two comparator B inputs, and six timer modules (RA–RE, RD × 2) with complementary PWM and three-phase waveform generation capability.

How does the R5F21356CDFP#X6 handle low-power operation?

The R5F21356CDFP#X6 offers three low-power modes: standard (6.5 mA @ 5 V, 20 MHz), wait (3.5 µA @ 3 V, 32 kHz), and stop (2.0 µA @ 3 V). In stop mode, the CPU and most peripherals halt while retaining RAM content and waking on any enabled interrupt - making it ideal for battery-backed standby in consumer electronics and industrial sensors.

Is the R5F21356CDFP#X6 pin-compatible with other members of the R8C/35C Group?

Yes, all R8C/35C Group MCUs in the PLQP0052JA-A (52-pin LQFP) package - including R5F21354CDFP through R5F2135CCDFP - share identical pinouts and electrical characteristics. Firmware and PCB layouts designed for one part can be reused across the family, with differentiation limited to memory size, temperature grade, and minor SFR initialization differences.