Renesas R5F12047ANA#20

Overview

R5F12047ANA#20 from Renesas Electronics is a 16-pin HWQFN-packaged RL78/G15 16-bit microcontroller with 4 KB code flash, 1 KB RAM, and 1 KB data flash. It operates from 2.4 V to 5.5 V, supports HALT/STOP low-power modes, and integrates an 8/10-bit 7-channel ADC, dual comparators, 8-channel 16-bit timer array, UART, two simplified I²C (IIC00/IIC01), two CSI (SPI-compatible) interfaces, and on-chip debug - targeting compact industrial sensor nodes and battery-powered control modules.

For engineers reviewing the R5F12047ANA#20 datasheet, R5F12047ANA#20 pinout, R5F12047ANA#20 application, or R5F12047ANA#20 equivalent, key selection criteria include its 16-pin HWQFN (3 × 3 mm, 0.5-mm pitch) footprint, −40°C to +125°C M-grade operation, 4 KB flash capacity, dual comparator support, and multiplexed analog input capability across ANI0–ANI6 pins.

Technical Context

The R5F12047ANA#20 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 map spans 1 MB address space with four banks of 8-bit general-purpose registers.

System clocking combines selectable high-speed on-chip oscillator (1–16 MHz, ±1.0% accuracy at TA = −20 to +85°C), low-speed 15 kHz on-chip oscillator for watchdog, and optional external crystal (X1/X2, 1–12 MHz) or EXCLK input. Power management includes SPOR with four reset voltage thresholds and HALT/STOP modes for ultra-low-power operation.

Key Specifications

Pinout & Package

Package: 16-pin HWQFN (3 × 3 mm, 0.5-mm pitch) with exposed thermal pad requiring PCB solder connection to non-electrical copper area.

Key Features

Applications

Equivalent & Alternatives

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

Compared with R5F12047ANA#20, R5F12048ANA#20 offers double code flash capacity for complex firmware, while R5F12047GNA#20 reduces thermal qualification cost for applications operating below +105°C - both retain identical pinout, peripheral set, and software compatibility.

Availability

R5F12047ANA#20 is available at Aetrix Electronics and suitable for industrial sensor nodes, smart thermostat controllers, and programmable logic relays requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for R5F12047ANA#20 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/G15 product line delivers ultra-low-power 16-bit MCUs optimized for cost-sensitive, space-constrained industrial and consumer control applications - emphasizing energy efficiency, integrated analog, and robust operation from −40°C to +125°C.

FAQ

What is the maximum operating frequency and instruction execution time of the R5F12047ANA#20?

The R5F12047ANA#20 supports a maximum high-speed on-chip oscillator frequency of 16 MHz, delivering a minimum instruction execution time of 0.0625 μs under those conditions. This timing assumes the RL78 CPU core's 3-stage pipeline is fully utilized and no wait states are inserted. The actual execution time may vary depending on memory access patterns and peripheral configurations used in the R5F12047ANA#20 application.

Does the R5F12047ANA#20 support external crystal oscillation, and what are the valid frequency ranges?

Yes, the R5F12047ANA#20 supports external crystal or ceramic resonator operation via X1 and X2 pins, with a valid frequency range of 1 MHz to 12 MHz at VDD = 2.4 V to 5.5 V. The device also accepts external clock input (EXCLK) from 1 MHz to 16 MHz. Crystal startup requires monitoring the oscillation stabilization time counter (OSTC) register to ensure reliable CPU initialization before switching from the on-chip oscillator - a critical step confirmed in the R5F12047ANA#20 datasheet.

How many analog input channels does the R5F12047ANA#20 support, and what resolution options are available?

The R5F12047ANA#20 integrates an 8/10-bit successive approximation A/D converter with 7 analog input channels (ANI0 through ANI6). Resolution is selectable per conversion, and the internal reference voltage is fixed at 0.815 V (typical). External reference voltage can be applied via IVREF0/IVREF1 pins. All 7 channels are accessible on the 16-pin HWQFN package, and their mapping to physical pins (e.g., P00, P02–P07) is defined in the R5F12047ANA#20 pin configuration tables.

Can the R5F12047ANA#20 operate in extended temperature environments, and what grade does #20 indicate?

Yes, the R5F12047ANA#20 is an M-grade industrial part qualified for operation from −40°C to +125°C. The "M" in the part number denotes this extended temperature rating, and the "#20" packaging specification indicates tray packaging for HWQFN devices. This makes the R5F12047ANA#20 suitable for under-hood automotive subsystems, motor drives, and other high-temperature industrial deployments where reliability beyond standard commercial or G-grade limits is required.

What debug interface does the R5F12047ANA#20 provide, and are external tools required?

The R5F12047ANA#20 includes a fully integrated on-chip debug circuit accessible via the TOOL0, TOOLRxD, and TOOLTxD pins - eliminating the need for external JTAG emulators. This debug interface supports breakpoints, real-time trace, and flash programming during development. However, Renesas explicitly cautions against using the on-chip debug function in mass-produced end products due to potential flash wear-out; production firmware should be verified and deployed without active debug usage in the final R5F12047ANA#20 implementation.