Renesas R5F51305AGFN#10

Overview

R5F51305AGFN#10 from Renesas is a 32-bit RX CPU-based microcontroller operating at up to 32 MHz (50 DMIPS), featuring 128 KB flash, 16 KB SRAM, 8 KB data flash, 12-bit A/D converter (17 channels), two 8-bit D/A outputs, capacitive touch sensing (36 channels), RTC, and IEC60730 compliance - deployed in industrial HMI and consumer appliance control systems.

For engineers reviewing the R5F51305AGFN#10 datasheet, R5F51305AGFN#10 pinout, R5F51305AGFN#10 application, or R5F51305AGFN#10 equivalent, key selection criteria include its 80-pin LFQFP package, –40°C to +105°C temperature grade, 1.8–5.5 V single-supply operation, software standby current of 0.37 µA, and integrated event link controller (ELC) for low-power peripheral coordination without CPU wake-up.

Technical Context

The R5F51305AGFN#10 implements the RXv1 core with CISC Harvard architecture, 5-stage pipeline, and variable-length instructions enabling ultra-compact code. It integrates a dedicated on-chip high-speed oscillator (32 MHz ±1%) and PLL for system clock generation, with independent clock domains for ICLK (CPU), PCLKB (peripherals), and FCLK (FlashIF), all configurable up to 32 MHz.

Its low-power architecture includes three modes - sleep, deep sleep, and software standby - with 4.8 µs wake-up time and LPT running on sub-clock during standby. The ELC enables direct inter-module triggering (e.g., timer → A/D start), while DTC supports chain transfers across four interrupt sources without CPU intervention.

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 R5F51305AGFN#10 provides extended temperature resilience without memory or peripheral trade-offs; versus R5F51306BGFP#30, it delivers optimal cost/size balance for thermally demanding but functionally focused touch-control applications.

Availability

R5F51305AGFN#10 is available at Aetrix Electronics and suitable for industrial HMI, home appliance control panels, and smart thermostat nodes requiring stable component supply, extended temperature operation, and IEC60730-certifiable firmware execution.

Supply support for R5F51305AGFN#10 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 industrial, automotive, and IoT markets.

The RX130 Group targets cost-sensitive, safety-aware embedded applications requiring robust touch interfaces, low-power operation, and functional safety support - designed specifically for appliances, building controls, and portable medical devices.

FAQ

What is the maximum operating frequency and associated performance of the R5F51305AGFN#10?

The R5F51305AGFN#10 operates at a maximum frequency of 32 MHz, delivering 50 DMIPS performance. Its RXv1 CPU core achieves this with a 5-stage pipeline, zero-wait-state flash access, and single-cycle instruction execution for many basic operations. This frequency is sustained across the full 1.8–5.5 V supply range, with voltage-dependent scaling: 8 MHz at 1.8–2.4 V, 16 MHz at 2.4–2.7 V, and 32 MHz above 2.7 V. The R5F51305AGFN#10 maintains this performance while supporting simultaneous peripheral operation including A/D conversion, touch sensing, and serial communications.

Does the R5F51305AGFN#10 support IEC60730 Class B compliance, and which built-in features enable it?

Yes, the R5F51305AGFN#10 includes hardware-assisted IEC60730 Class B compliance features. These include self-diagnostic routines for the A/D converter (including analog input disconnection detection), clock frequency accuracy measurement circuit (CAC), independent watchdog timer (IWDT), and RAM test assistance using the data operation circuit (DOC). It also provides dedicated error-checking logic for the RTC and supports CRC calculation for data integrity verification. These features are documented in the R01DS0273EJ0300 datasheet and reduce external component count and firmware development effort for safety-critical applications. The R5F51305AGFN#10 implements these diagnostics without requiring external supervision.

What are the capacitive touch sensing capabilities of the R5F51305AGFN#10, and how many keys can it support?

The R5F51305AGFN#10 integrates a dedicated Capacitive Touch Sensing Unit (CTSUa) supporting up to 36 physical sense pins (TS0–TS35). In self-capacitance mode, each pin serves one key, enabling up to 36 independent touch buttons. In mutual-capacitance matrix mode, it supports configurations up to 36 rows × 9 columns (324 keys) using shared scan lines. The unit includes hardware acceleration for noise cancellation, automatic baseline adjustment, and threshold calibration - all executed without CPU intervention. This capability is fully functional in the R5F51305AGFN#10's 80-pin LFQFP package, matching the specification for the RX130 Group's 80-pin variants.

What low-power modes does the R5F51305AGFN#10 support, and what is its lowest achievable current draw?

The R5F51305AGFN#10 supports three low-power modes: Sleep, Deep Sleep, and Software Standby. In Software Standby mode - the deepest state - it draws just 0.37 µA while retaining SRAM content and enabling wake-up via LPT timeout, external interrupt, or RTC alarm. Recovery time from this mode is 4.8 µs. The Low Power Timer (LPT) continues operating using the sub-clock or IWDT-dedicated oscillator, allowing periodic wake-up without full CPU activation. This ultra-low current is measured at VCC = 3.3 V and TA = 25°C, and remains valid across the full –40°C to +105°C operating range of the R5F51305AGFN#10.

Which communication interfaces are available on the R5F51305AGFN#10, and how many channels does each support?

The R5F51305AGFN#10 provides seven serial communication channels: six SCIg (SCI0, SCI1, SCI5, SCI6, SCI8, SCI9) and one SCIh (SCI12), plus one I²C bus interface (RIICa) and one Serial Peripheral Interface (RSPIa). The SCI modules support asynchronous, clock-synchronous, smart card, and LIN protocols; RIICa operates up to 400 kbps in master/slave mode; RSPIa achieves up to 16 Mbps with 128-bit buffers. Notably, the R5F51305AGFN#10 omits the Remote Control Signal Receiver (REMC) present in 100-pin variants, consistent with its 80-pin package configuration per Table 1.2 of the datasheet.