Renesas R5F21357CDFP#30

Overview

R5F21357CDFP#30 from Renesas Electronics is a 16-bit R8C CPU core MCU with 48 KB flash program ROM, 4 KB data flash (BGO-capable), and 4 KB RAM, operating at up to 20 MHz (VCC = 2.7–5.5 V) for embedded control in consumer audio and office equipment. It integrates UART0/1/2, I²C, LIN, 12-channel 10-bit ADC, dual 8-bit DAC, and six timer modules including complementary PWM for motor drive.

For engineers reviewing the R5F21357CDFP#30 datasheet, R5F21357CDFP#30 pinout, R5F21357CDFP#30 application, or R5F21357CDFP#30 equivalent, key selection criteria include its -40°C to +85°C D-version temperature rating, 52-pin LQFP package, background operation data flash, real-time clock (Timer RE), and hardware LIN support via UART0 and Timer RA.

Technical Context

The R5F21357CDFP#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, with fixed interrupt vector table at 0FFDCh–0FFFFh and data flash blocks A–D mapped at 03000h–03FFFh.

Peripheral integration includes three UART channels (UART0/1/2), one I²C bus (shared with SSU), hardware LIN module (using UART0 and Timer RA), and four independent timer units (RA–RD) plus Timer RE for real-time clock functions-enabling precise timing, waveform generation, and motor control without external components.

Key Specifications

Pinout & Package

Package: 52-pin LQFP (PLQP0052JA-A), 10 mm × 10 mm body, 0.65 mm pitch, 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 R5F21357CNFP#30, the R5F21357CDFP#30 adds guaranteed operation down to -40°C - critical for outdoor or unheated industrial enclosures - while R5F21358CDFP#30 trades pin compatibility for +16 KB ROM and +2 KB RAM to accommodate complex connectivity stacks.

Availability

R5F21357CDFP#30 is available at Aetrix Electronics and suitable for audio equipment control, office equipment motor drive, consumer appliance UI, and industrial sensor node applications requiring stable component supply and long-term lifecycle support.

Supply support for R5F21357CDFP#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, and power solutions for automotive, industrial, and IoT markets.

The R8C/35C Group, including R5F21357CDFP#30, was designed for cost-sensitive, high-integration embedded control in consumer electronics - emphasizing low EMI, mixed-signal capability, and robust real-time performance.

FAQ

What is the maximum operating frequency of the R5F21357CDFP#30?

The R5F21357CDFP#30 operates at up to 20 MHz when supplied with VCC = 2.7–5.5 V and using an external 20 MHz crystal on XIN/XOUT. At lower supply voltages (1.8–5.5 V), the maximum frequency reduces to 5 MHz to maintain timing margins and stability.

Does the R5F21357CDFP#30 support in-circuit debugging?

Yes, the R5F21357CDFP#30 includes on-chip debug functionality accessible via dedicated debug pins and compatible with Renesas E8/E8a emulators. This allows full breakpoint, watchpoint, and register inspection capabilities without requiring external debug hardware beyond the emulator interface.

How many analog input channels does the R5F21357CDFP#30 have?

The R5F21357CDFP#30 features 12 analog input channels (AN0 through AN11), all 10-bit resolution, with sample-and-hold and hardware sweep mode. These are distributed across ports P0 (AN0–AN7), P1 (AN8–AN11), and support simultaneous sampling in specific configurations per the hardware manual.

What is the purpose of the data flash memory in the R5F21357CDFP#30?

The R5F21357CDFP#30 includes 4 KB of data flash (1 KB × 4 blocks) with background operation (BGO) support. This allows non-volatile storage of calibration data, device configuration, or runtime parameters that must persist across power cycles - and can be rewritten while the main application continues executing.

Can the R5F21357CDFP#30 generate complementary PWM waveforms?

Yes, Timer RD in the R5F21357CDFP#30 supports complementary PWM mode, producing synchronized three-phase waveforms on six output pins (TRDIOA0–TRDIOD1) with programmable dead-time insertion - essential for driving BLDC or stepper motor inverters safely and efficiently.