Renesas R5F1058AALA#U0

Overview

R5F1058AALA#U0 from Renesas Electronics is a 25-pin WFLGA-packaged 16-bit RL78/G11 microcontroller designed for ultra-low-power embedded control in consumer-grade applications (−40 to +85°C). It integrates 16 KB code flash, 2 KB data flash, 1.5 KB RAM, an 11-channel 10-bit ADC, dual comparators, 2-channel 8-bit DAC, and supports 24 MHz operation delivering 33 DMIPS. It targets battery-powered sensor nodes and smart home peripherals requiring HALT/STOP/SNOOZE power modes.

For engineers reviewing the R5F1058AALA#U0 datasheet, R5F1058AALA#U0 pinout, R5F1058AALA#U0 application, or R5F1058AALA#U0 equivalent, key selection criteria include its 25-pin WFLGA (3 × 3 mm, 0.50-mm pitch) footprint, 1.6–5.5 V supply range, on-chip LVD with 14-level programmability, and support for CSI (4 ch), UART (2 ch), and simplified I²C (4 ch) interfaces in space-constrained designs.

Technical Context

The R5F1058AALA#U0 implements the RL78 CPU core with CISC architecture and 3-stage pipeline, enabling minimum instruction execution time of 0.04167 μs at 24 MHz using the high-speed on-chip oscillator (±1.0% accuracy over VDD = 1.8–5.5 V, TA = −20 to +85°C). Its event link controller (ELC) supports 18 configurable event signals linked to peripheral functions, while the data transfer controller (DTC) provides normal, repeat, and block transfer modes activated by 24 interrupt sources.

Power management includes HALT, STOP, and SNOOZE modes with 58.3 μA/MHz active current and 0.64 μA retention current (LVD only). The analog subsystem comprises two comparators (high-speed/low-speed/window modes), one PGA, internal 1.45 V reference, and temperature sensor - all operating across the full 1.6–5.5 V supply range without external components.

Key Specifications

Pinout & Package

25-pin WFLGA (3 × 3 mm, 0.50-mm pitch) with exposed die pad electrically tied to VSS. Requires 0.47–1 μF capacitor between REGC and VSS. Pin functions are multiplexed via Peripheral I/O Redirection Registers (PIOR0–PIOR3); default configuration per datasheet Rev.2.60.

Key Features

Applications

Equivalent & Alternatives

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

Compared with R5F1057AANA#U0 and R5F1056AASM#10, the R5F1058AALA#U0 offers the highest pin density (25 pins in 3 × 3 mm), full EVDD isolation for analog noise immunity, and maximum analog channel count (11) - making it optimal for miniaturized, mixed-signal industrial IoT edge nodes where layout area and measurement fidelity are critical.

Availability

R5F1058AALA#U0 is available at Aetrix Electronics and suitable for smart thermostat sensor nodes, wireless door lock MCUs, portable medical glucometers, and industrial panel meter front-ends requiring stable component supply, long-lifecycle assurance, and RoHS-compliant packaging.

Supply support for R5F1058AALA#U0 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, power, and SoC solutions for automotive, industrial, and IoT markets.

The RL78/G11 product line delivers true low-power 16-bit control for cost-sensitive consumer and industrial applications, emphasizing ultra-low active/standby current, integrated analog peripherals, and simplified development with on-chip debug and self-programming flash.

FAQ

What is the package type and pin count of the R5F1058AALA#U0?

The R5F1058AALA#U0 uses a 25-pin WFLGA (Wafer-Level Chip-Scale Package) with 3 × 3 mm body size and 0.50-mm pitch. It includes an exposed die pad that must be connected to VSS. This package enables ultra-compact PCB layouts ideal for space-constrained consumer electronics and wearables where the R5F1058AALA#U0 serves as the primary system controller.

Does the R5F1058AALA#U0 support hardware debugging during development?

Yes, the R5F1058AALA#U0 includes an on-chip debug function compatible with Renesas E2 emulator and CS+ IDE. However, Renesas explicitly cautions against using this feature in mass-produced end products due to potential flash memory wear-out beyond guaranteed rewrite cycles. For production firmware updates, use the R5F1058AALA#U0's self-programming capability with boot swap instead of debug-based programming.

What are the key power-saving modes supported by the R5F1058AALA#U0?

The R5F1058AALA#U0 supports HALT, STOP, and SNOOZE modes. In STOP mode with only the low-voltage detector (LVD) active, it draws just 0.64 μA. Active-mode current is 58.3 μA/MHz. These modes are controlled via dedicated system registers and can be entered/exited using single instructions - enabling rapid wake-up for event-driven applications like the R5F1058AALA#U0-based smart sensor nodes.

Can the R5F1058AALA#U0 operate from a single 1.8 V supply?

Yes, the R5F1058AALA#U0 operates across 1.6 V to 5.5 V, including 1.8 V nominal supply. At 1.8 V, maximum clock frequency is limited to 8 MHz (per datasheet Rev.2.60 Section 2.2.1), supporting low-power operation in energy-harvesting or coin-cell applications. All peripherals - including ADC, comparators, and UART - remain fully functional within this voltage range, ensuring consistent behavior of the R5F1058AALA#U0 across diverse power architectures.

How many analog input channels does the R5F1058AALA#U0 support, and what is their resolution?

The R5F1058AALA#U0 integrates an 11-channel, 10-bit successive-approximation ADC with selectable 8/10-bit resolution. Input channels include ANI0–ANI3 (dedicated analog pins), ANI16–ANI22 (shared with port pins), and internal sources (temperature sensor, 1.45 V reference). Conversion is VDD-referenced and functional across the full 1.6–5.5 V supply range - a key capability distinguishing the R5F1058AALA#U0 from lower-channel RL78 variants.