Renesas R5F51303ADFN#30

Overview

R5F51303ADFN#30 from Renesas is a 32-bit RX CPU-based microcontroller with 64 KB flash, 10 KB SRAM, and 8 KB data flash, operating at up to 32 MHz (50 DMIPS), supporting capacitive touch sensing (36 channels), 12-bit A/D conversion (17 channels), dual 8-bit D/A outputs, RTC, and IEC60730-compliant safety features for industrial control panels and consumer appliance HMI systems.

For engineers reviewing the R5F51303ADFN#30 datasheet, R5F51303ADFN#30 pinout, R5F51303ADFN#30 application, or R5F51303ADFN#30 equivalent, key selection criteria include its 80-pin LFQFP package (PLQP0080KB-B), 1.8–5.5 V single-supply operation, software standby current of 0.37 µA, 4.8 µs wake-up time, and integrated CTSU/ELC/DTC for low-power touch-enabled embedded designs.

Technical Context

The R5F51303ADFN#30 implements the 32-bit RXv1 CPU core with Harvard architecture, 5-stage pipeline, and variable-length instructions-enabling 50 DMIPS at 32 MHz with 64-bit accumulator support for 32×32 multiply operations in one cycle. It integrates ELC for event-driven peripheral coordination without CPU intervention and DTC for autonomous data transfers triggered by 115 interrupt sources.

Its clock system includes high-speed on-chip oscillator (32 MHz ±1%), sub-clock (32.768 kHz), PLL (4–8 MHz input), and CAC for real-time clock accuracy monitoring. Power management supports three low-power modes, including software standby with LPT running on sub-clock and IWDT-dedicated 15 kHz oscillator.

Key Specifications

Pinout & Package

Package: 80-pin LFQFP (PLQP0080KB-B), 12 × 12 mm, 0.5 mm pitch, exposed pad not specified.

Key Features

Applications

Equivalent & Alternatives

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

Compared with R5F51305ADFN#30, the R5F51303ADFN#30 trades flash/SRAM capacity for lower BOM cost in fixed-function appliances; compared with R5F51303ADFL#30, it delivers 30 additional GPIOs and full peripheral availability-including all 7 SCI channels and 17 A/D inputs-within the same 80-pin footprint.

Availability

R5F51303ADFN#30 is available at Aetrix Electronics and suitable for home appliance control panels, industrial sensor nodes, and smart thermostat interfaces requiring stable component supply, long-lifecycle support, and IEC60730-certifiable firmware execution.

Supply support for R5F51303ADFN#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, power, and SoC solutions for automotive, industrial, and IoT markets.

The RX130 Group targets cost-sensitive, low-power embedded applications requiring rich analog integration, capacitive touch, and functional safety-designed specifically for appliance HMIs, sensor edge nodes, and medical device interfaces.

FAQ

What is the maximum operating frequency and associated performance of the R5F51303ADFN#30?

The R5F51303ADFN#30 operates at a maximum frequency of 32 MHz, delivering 50 DMIPS of processing performance. Its 32-bit RXv1 CPU core supports single-cycle 32×32 multiply operations and a 64-bit accumulator. Performance scales with supply voltage: 8 MHz at 1.8–2.4 V, 16 MHz at 2.4–2.7 V, and full 32 MHz above 2.7 V. This makes R5F51303ADFN#30 suitable for real-time control tasks in appliance and industrial applications.

Does the R5F51303ADFN#30 support IEC60730 functional safety compliance?

Yes, the R5F51303ADFN#30 includes hardware-assisted IEC60730 compliance features: self-diagnostic A/D converter, clock frequency accuracy measurement circuit (CAC), independent watchdog timer (IWDT) with dedicated oscillator, RAM test assistance via DOC, and analog input disconnection detection. These features reduce software validation effort for Class B safety-critical applications such as home appliance controllers. The R5F51303ADFN#30 is designed to meet the requirements of IEC60730-1 Annex H.

What are the memory resources available on the R5F51303ADFN#30?

The R5F51303ADFN#30 integrates 64 KB of on-chip flash memory (with no wait states at 32 MHz), 10 KB of SRAM (also zero-wait-state), and 8 KB of data flash rated for 1,000,000 program/erase cycles. The data flash supports background operation (BGO), allowing concurrent code execution and firmware updates. All memory is accessible under the 4-Gbyte linear address space of the RX CPU. This memory configuration is optimized for compact, deterministic real-time applications using R5F51303ADFN#30.

How many capacitive touch channels does the R5F51303ADFN#30 support, and what configurations are available?

The R5F51303ADFN#30 integrates a dedicated Capacitive Touch Sensing Unit (CTSUa) supporting up to 36 self-capacitance keys (one pin per key) or up to 324 mutual-capacitance keys (using 36 pins in matrix configuration). It provides hardware-accelerated scanning, noise cancellation, and automatic calibration. The CTSU operates independently of the CPU via ELC triggers, enabling low-power touch wake-up. This capability is fully enabled in the 80-pin PLQP0080KB-B package used by R5F51303ADFN#30.

What low-power modes and wake-up capabilities does the R5F51303ADFN#30 offer?

The R5F51303ADFN#30 supports three low-power modes: Sleep, Deep Sleep, and Software Standby. In Software Standby mode, current consumption drops to 0.37 µA while the Low Power Timer (LPT) and IWDT remain active. Wake-up occurs in 4.8 µs from standby via external interrupt, LPT match, or RTC alarm. The LPT can run on sub-clock (32.768 kHz) or IWDTCLK (15 kHz), enabling precise, ultra-low-power timing-critical for battery-operated R5F51303ADFN#30 deployments.