Renesas R5F21356CNFP#30

Overview

R5F21356CNFP#30 from Renesas Electronics is a 16-bit R8C CPU core microcontroller 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), integrates dual 10-bit A/D converters (12 channels), dual 8-bit D/A outputs, LIN hardware module, and six timer units-including complementary PWM-capable Timer RD-for motor control in consumer appliance power stages.

For engineers reviewing the R5F21356CNFP#30 datasheet, R5F21356CNFP#30 pinout, R5F21356CNFP#30 application, or R5F21356CNFP#30 equivalent, key selection criteria include its 52-pin LQFP package, -20°C to +85°C temperature grade (N version), integrated voltage detection with three selectable levels, low-power wait/stop modes (down to 2.0 µA), and hardware LIN compliance using UART0 and Timer RA.

Technical Context

The R5F21356CNFP#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 (00000h–FFFFFh), with fixed interrupt vector table at 0FFDCh–0FFFFh and data flash at 03000h–03FFFh.

Peripheral integration includes UART0/1/2 (with I²C mode on UART2), SSU, LIN module, 14-bit watchdog timer, DTC with 33 activation sources, and four independent timer units (RA–RD) plus real-time clock Timer RE-enabling synchronized PWM generation, input capture, and event counting without CPU intervention.

Key Specifications

Pinout & Package

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

Key Features

Applications

Equivalent & Alternatives

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

Compared with R5F21355CNFP and R5F21357CNFP, the R5F21356CNFP#30 delivers optimal balance of code space (32 KB), data retention (2.5 KB RAM), and peripheral headroom for mid-tier consumer electronics - avoiding overdesign while preserving upgrade path to higher-density variants.

Availability

R5F21356CNFP#30 is available at Aetrix Electronics and suitable for home appliance motor control, office equipment scan engines, audio system power management, and consumer audio DSP interface applications requiring stable component supply across multi-year production cycles.

Supply support for R5F21356CNFP#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 automotive, industrial, and consumer markets.

The R8C/35C Group, including the R5F21356CNFP#30, was designed for cost-sensitive, high-reliability embedded control in white goods and audio systems - emphasizing EMI/EMS robustness, integrated analog peripherals, and ultra-low-power operation.

FAQ

What is the maximum operating frequency and supply voltage range for the R5F21356CNFP#30?

The R5F21356CNFP#30 operates at up to 20 MHz when supplied with 2.7–5.5 V, and supports reduced-frequency operation down to 5 MHz at 1.8–5.5 V. This dual-voltage/frequency capability allows flexible design trade-offs between performance and power consumption - for example, running at 10 MHz/3.0 V achieves typical current draw of 3.5 mA while maintaining full peripheral functionality.

Does the R5F21356CNFP#30 support hardware LIN communication, and how is it implemented?

Yes, the R5F21356CNFP#30 includes a dedicated hardware LIN module compliant with ISO 9141-2, implemented using UART0 for serial framing and Timer RA for precise baud rate generation and sync field timing. This eliminates software-based bit-banging, guarantees timing accuracy, and frees CPU resources for application logic - critical for reliable communication in appliance subsystems.

How many A/D and D/A channels does the R5F21356CNFP#30 integrate, and what are their resolutions?

The R5F21356CNFP#30 integrates a 10-bit A/D converter with 12 input channels (AN0–AN11) and two independent 8-bit D/A converters (DA0 and DA1). The A/D supports sample-and-hold and sweep mode for sequential conversion, while the D/A outputs provide programmable analog references or control signals - enabling closed-loop feedback in motor and power-supply applications without external DACs.

What low-power modes are available on the R5F21356CNFP#30, and what are their typical current draws?

The R5F21356CNFP#30 offers standard operating, wait, and stop modes. Typical current consumption is 6.5 mA (5.0 V, 20 MHz), 3.5 µA in wait mode (3.0 V, 32 kHz XCIN), and 2.0 µA in stop mode (3.0 V). These modes are controlled via system clock registers and enable rapid wake-up from external interrupts or RTC alarms - essential for battery-powered remote controls or sensor nodes.

Is the R5F21356CNFP#30 pin-compatible with other members of the R8C/35C Group, and what package does it use?

Yes, the R5F21356CNFP#30 uses the 52-pin LQFP package (PLQP0052JA-A) and shares identical pinout and peripheral mapping with all R8C/35C Group variants including R5F21354–R5F2135CCNFP/CDFP. This enables direct substitution within the family - for example, upgrading from R5F21355CNFP to R5F21356CNFP#30 requires no PCB changes, only firmware reflash and memory layout adjustment.