Renesas R5F21368CDFP#30

Overview

R5F21368CDFP#30 from Renesas is a 16-bit R8C CPU core microcontroller with 64 KB program ROM, 6 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 59 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–RG) for motor control and real-time sequencing. It targets embedded control in industrial appliances and audio systems.

For engineers reviewing the R5F21368CDFP#30 datasheet, R5F21368CDFP#30 pinout, R5F21368CDFP#30 application, or R5F21368CDFP#30 equivalent, key selection criteria include its −40°C to +85°C D-version temperature rating, 64-pin LQFP (PLQP0064KB-A) package, integrated LIN hardware module, BGO-capable data flash, and multi-mode clock system with high-speed on-chip oscillator and 32 kHz XCIN support.

Technical Context

The R5F21368CDFP#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 at 03000h–03FFFh.

Peripheral integration includes Timer RD (16-bit × 2, 6-pin PWM, complementary & reset-synchronous modes), Timer RG (phase counting for 2-phase encoders), and UART2 with hardware LIN protocol support using Timer RA and UART0 - all configured via dedicated SFRs and interrupt vectors (69 total, 7 priority levels).

Key Specifications

Pinout & Package

Package: 64-pin LQFP (PLQP0064KB-A), 10 mm × 10 mm, 0.5 mm pitch, exposed pad not specified. Pin functions are software-configurable per peripheral multiplexing (e.g., P0_0–P0_7 support analog input AN0–AN7 or DA0/DA1 outputs).

Key Features

Applications

Equivalent & Alternatives

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

Compared with R5F21368CNFP#30, the R5F21368CDFP#30 adds −40°C operational capability and retains full peripheral compatibility; versus R5F21367CDFP#30, it provides +16 KB ROM and +2 KB RAM for complex control algorithms or larger communication stacks without changing layout or firmware architecture.

Availability

R5F21368CDFP#30 is available at Aetrix Electronics and suitable for industrial motor control, sensor fusion systems, and consumer audio power management requiring stable component supply over extended product lifecycles.

Supply support for R5F21368CDFP#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 is a global semiconductor leader specializing in microcontrollers, analog, and power solutions for industrial, automotive, and IoT markets.

The R8C/36C Group is designed for cost-sensitive, high-reliability embedded control applications demanding integrated peripherals, low-power operation, and robust EMI/EMS performance in compact form factors.

FAQ

What is the maximum operating frequency of the R5F21368CDFP#30 and under what supply conditions?

The R5F21368CDFP#30 achieves a maximum operating frequency of 20 MHz when powered at VCC = 2.7–5.5 V using the XIN clock source. At lower supply voltages (1.8–5.5 V), the guaranteed maximum frequency reduces to 5 MHz. This dual-frequency specification allows flexible design trade-offs between performance and ultra-low-voltage operation in battery-backed systems.

Does the R5F21368CDFP#30 support hardware LIN communication, and how is it implemented?

Yes, the R5F21368CDFP#30 includes a dedicated hardware LIN module compliant with LIN 2.0/2.1 standards. It is implemented by combining UART0 with Timer RA to generate precise baud rates and handle LIN frame synchronization, checksum calculation, and slave node response timing - eliminating software protocol overhead and ensuring deterministic bus behavior.

How does the background operation (BGO) function work in the R5F21368CDFP#30 data flash?

The R5F21368CDFP#30 data flash supports background operation (BGO), allowing erase and program operations on its 1 KB × 4 blocks while the CPU simultaneously executes application code from program ROM. This is managed via dedicated SFRs and interrupt flags, enabling non-disruptive firmware updates, parameter storage, and logging without system halts or context switching delays.

What are the key low-power modes available on the R5F21368CDFP#30, and what are their typical current draws?

The R5F21368CDFP#30 offers three primary low-power modes: standard operating mode (7.0 mA @ 5.0 V, 20 MHz), wait mode (4.0 µA @ 3.0 V, 32 kHz XCIN active), and stop mode (2.0 µA @ 3.0 V, all clocks halted except reset circuit). These modes are selected via system clock control registers and support rapid wake-up via external interrupts or RTC alarms.

Can the R5F21368CDFP#30 drive 3-phase motor inverters directly, and which peripherals enable this?

Yes, the R5F21368CDFP#30 can directly drive 3-phase motor inverters using Timer RD's complementary PWM mode, which outputs six synchronized, dead-time-adjustable signals (TRDIOA0–TRDIOD1) with reset-synchronous and triangular/sawtooth modulation. Combined with its 10-bit ADC for current sensing and Timer RG for encoder position feedback, it forms a complete motor control subsystem without external gate drivers or timing ICs.