Renesas R5F12047ASP#30

Overview

R5F12047ASP#30 from Renesas Electronics is a 16-pin, 4 KB code flash, 1 KB RAM RL78/G15 8-bit microcontroller with 7-channel 8/10-bit A/D converter, 8-channel 16-bit timer array, and integrated UART, simplified I²C (2 channels), and simplified SPI (2 channels). It operates from 2.4 V to 5.5 V and supports industrial temperature range (−40°C to +105°C) for embedded control in sensor interfaces and appliance subsystems.

For engineers reviewing the R5F12047ASP#30 datasheet, R5F12047ASP#30 pinout, R5F12047ASP#30 application, or R5F12047ASP#30 equivalent, this page delivers verified functional scope, package-confirmed I/O mapping, real-world timing and analog performance metrics, and validated alternative options for cost, supply, or thermal design trade-offs.

Technical Context

The R5F12047ASP#30 implements the RL78 CPU core with CISC architecture and 3-stage pipeline, enabling minimum instruction execution time of 0.0625 μs at 16 MHz using the high-speed on-chip oscillator. Its memory subsystem includes 4 KB code flash (1 KB block size), 1 KB data flash (512 B block, 1M rewrite cycles), and 1 KB on-chip RAM - all accessible under single-supply operation.

Peripherals are tightly integrated via the TAU0 timer array (8 channels), SAU0 serial array (2 channels supporting CSI/UART/I²C), dual comparators (1 active), and 7-channel A/D converter with internal 0.815 V reference. Power management includes HALT/STOP modes, selectable SPOR (4 reset voltage levels), and low-power 15 kHz on-chip oscillator for watchdog operation.

Key Specifications

Pinout & Package

Package: 16-pin SSOP (4.4 × 5.0 mm, 0.65-mm pitch), RoHS-compliant, surface-mount.

Key Features

Applications

Equivalent & Alternatives

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

Compared with R5F12047ASP#30, the R5F12048ASP#30 offers double flash capacity in identical packaging for seamless firmware scalability, while the R5F12047GNA#00 delivers identical functionality in a smaller, thermally superior QFN package-enabling higher-density layouts without altering peripheral configuration or timing behavior.

Availability

R5F12047ASP#30 is available at Aetrix Electronics and suitable for home appliance control, industrial sensor nodes, smart meter subsystems, and medical diagnostic instruments requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for R5F12047ASP#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 IoT markets.

The RL78/G15 product line delivers ultra-low-power 8-bit MCUs optimized for cost-sensitive, battery-operated, and thermally demanding embedded applications - emphasizing integrated analog, flexible clocking, and robust industrial qualification.

FAQ

What is the maximum operating frequency of the R5F12047ASP#30?

The R5F12047ASP#30 supports a maximum high-speed on-chip oscillator frequency of 16 MHz, delivering a minimum instruction execution time of 0.0625 μs. It also accepts external crystal (1–12 MHz) or clock input (1–16 MHz) via X1/X2 or EXCLK pins. The oscillator accuracy is ±1.0% over −20°C to +85°C for G-grade devices, making R5F12047ASP#30 suitable for timing-critical control loops without external crystal dependency.

Does the R5F12047ASP#30 support in-system programming?

Yes, the R5F12047ASP#30 supports self-programming of both code and data flash memory via its on-chip debug interface, without requiring a boot swap function. Programming is performed under full VDD (2.4–5.5 V) with erase-before-write operation. However, background operation (BGO) is not supported - code execution halts during data flash writes. This behavior is inherent to R5F12047ASP#30's flash controller architecture and must be accounted for in firmware design.

How many analog input channels does the R5F12047ASP#30 provide?

The R5F12047ASP#30 integrates a 7-channel 8/10-bit A/D converter, supporting analog inputs ANI0 through ANI6. Each channel accepts 0–VDD input range and can use either the internal 0.815 V reference or external reference voltage. The A/D module operates across the full supply range (2.4–5.5 V) and temperature grade (−40°C to +105°C), ensuring consistent R5F12047ASP#30 performance in variable environmental conditions.

Can the R5F12047ASP#30 operate in STOP mode with the watchdog timer active?

Yes, the R5F12047ASP#30 maintains watchdog timer operation during STOP mode using the dedicated 15 kHz low-speed on-chip oscillator. This allows reliable system recovery from software hangs while consuming minimal current (<1 μA typical). The watchdog timeout period is programmable, and its clock source remains independent of main system clocks - a key reliability feature confirmed in R5F12047ASP#30's electrical specifications and user manual.

What communication interfaces are available on the R5F12047ASP#30?

The R5F12047ASP#30 provides one UART channel, two simplified I²C (IICA) channels, and two simplified SPI (CSI) channels via its SAU0 serial array unit. All interfaces share multiplexed pins (e.g., P01/P02/P06/P07) and support simultaneous operation. Notably, R5F12047ASP#30 does not include full I²C bus master arbitration or multi-master support - it implements simplified I²C compliant with standard protocol framing but limited to single-master configurations.