Renesas R5F21368SNFP#V0

Overview

R5F21368SNFP#V0 from Renesas is a 16-bit R8C CPU core microcontroller with 64 KB flash 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 (2.7–5.5 V) or 5 MHz (1.8–5.5 V), integrates 12-channel 10-bit A/D converter, electrostatic capacitive touch sensor control unit (28 channels), and hardware LIN module. It targets embedded control in consumer appliances requiring low EMI/EMS and integrated analog sensing.

For engineers reviewing the R5F21368SNFP#V0 datasheet, R5F21368SNFP#V0 pinout, R5F21368SNFP#V0 application, or R5F21368SNFP#V0 equivalent, key selection criteria include its 64-pin LQFP package, on-chip touch sensing capability, dual UART + I²C + SSU serial interfaces, 14-bit watchdog timer with selectable oscillator, and voltage detection circuit with three configurable thresholds.

Technical Context

The R5F21368SNFP#V0 implements the R8C CPU core with 89 fundamental instructions, 1 Mbyte address space, and 16×16→32-bit multiplier with MAC support. Its memory map allocates program ROM across 08000h–17FFFh and data flash at 07000h–07FFFh, enabling segmented code execution and non-volatile parameter storage with BGO.

Peripheral integration includes Timer RJ_0 (16-bit periodic/pulse output), Timer RB2_0 (PWM/one-shot), Timer RC_0 (4-register capture/compare with 3-pin PWM), and Timer RE2 (8-bit RTC/compare match), all coordinated via Event Link Controller (30 sources × 10 operations) for autonomous peripheral chaining without CPU intervention.

Key Specifications

Pinout & Package

Package: 64-pin LQFP (PLQP0064KB-A), 0.5 mm pitch, 10 × 10 mm body, N-version (−20°C to +85°C).

Key Features

Applications

Equivalent & Alternatives

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

Compared with R5F21368SNFP#V0, the R5F2136ASNFP#V0 provides headroom for feature-rich firmware without altering hardware, while the R5F21368SDFP#V0 delivers guaranteed operation across harsher thermal conditions-both maintain full pin and peripheral compatibility.

Availability

R5F21368SNFP#V0 is available at Aetrix Electronics and suitable for home appliance control panels, office equipment power supervisors, audio remote interfaces, and consumer IoT sensor hubs requiring stable component supply and long-term production support.

Supply support for R5F21368SNFP#V0 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/36T-A Group is designed for cost-sensitive, low-power embedded control applications requiring integrated analog sensing, touch UI, and communication interfaces-targeting consumer electronics and white goods.

FAQ

What is the maximum operating frequency and voltage range for the R5F21368SNFP#V0?

The R5F21368SNFP#V0 supports 20 MHz operation at 2.7–5.5 V supply and 5 MHz operation down to 1.8 V. This dual-frequency capability enables high-performance mode during active UI interaction and ultra-low-power sleep at reduced voltage, making it ideal for battery-backed or energy-harvesting designs where dynamic voltage scaling is required. The R5F21368SNFP#V0's voltage detection circuit monitors these rails to prevent corruption during brown-out events.

Does the R5F21368SNFP#V0 support capacitive touch sensing, and how many channels are available?

Yes, the R5F21368SNFP#V0 integrates a dedicated Touch Sensor Control Unit (TSCU) supporting up to 28 electrostatic capacitive touch detection channels. It uses four system channels (CHxA0, CHxA1, CHxB, CHxC) to drive electrode networks and supports both self- and mutual-capacitance measurement. This eliminates external touch controller ICs in applications like appliance control panels, and the R5F21368SNFP#V0's TSCU is fully configurable via SFRs without requiring external components.

What serial communication interfaces does the R5F21368SNFP#V0 include?

The R5F21368SNFP#V0 includes UART0 (two independent channels), UART2 (one channel supporting clock-synchronous/asynchronous modes and I²C-bus), SSU_0 (synchronous serial interface, shared with I²C_0), and a hardware LIN module (HW-LIN_0) that reuses UART0_0, UART0_1, or UART2 resources. This combination enables concurrent communication with displays, sensors, and automotive sub-nodes-critical for the R5F21368SNFP#V0's role in multi-interface consumer systems.

What is the purpose of the Background Operation (BGO) function in the R5F21368SNFP#V0's data flash?

The Background Operation (BGO) function allows the R5F21368SNFP#V0 to execute application code from program ROM while simultaneously erasing or programming its 4 KB data flash (1 KB × 4 blocks). This enables real-time parameter logging, over-the-air firmware patching, and calibration data updates without halting system operation-essential for maintaining responsiveness in UI-driven appliances where the R5F21368SNFP#V0 serves as the primary controller.

How does the R5F21368SNFP#V0 manage low-power operation, and what are the typical current draws?

The R5F21368SNFP#V0 offers multiple low-power modes: wait mode draws 4.0 µA at 3.0 V with 32 kHz XCIN clock, and stop mode draws 2.2 µA at 3.0 V. These are enabled via software-controlled clock gating and peripheral disable. The R5F21368SNFP#V0 also features a low-speed on-chip oscillator dedicated to the watchdog timer, allowing reliable timeout supervision even in deepest sleep states-key for battery longevity in remote controls and sensor nodes using the R5F21368SNFP#V0.