Renesas R5F12048MNA#20

Overview

R5F12048MNA#20 from Renesas Electronics is a 16-pin HWQFN-packaged RL78/G15 16-bit microcontroller with 8 KB code flash, 1 KB data flash, and 1 KB RAM, operating from 2.4 to 5.5 V across −40°C to +125°C industrial temperature range. It integrates an 8-channel 16-bit timer array, 11-channel 8/10-bit ADC, dual comparators, UART, two simplified SPI (CSI) channels, two simplified I²C channels, and on-chip debug - targeting embedded control in motor drives, sensor nodes, and industrial HMI.

For engineers reviewing the R5F12048MNA#20 datasheet, R5F12048MNA#20 pinout, R5F12048MNA#20 application, or R5F12048MNA#20 equivalent, key selection criteria include its 16-pin HWQFN (3 × 3 mm, 0.5-mm pitch) package, M-grade −40°C to +125°C operation, 8 KB flash with self-programming, dual comparator support, and multiplexed analog inputs (ANI0–ANI6) with internal reference voltage.

Technical Context

The R5F12048MNA#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 clock system supports X1/X2 crystal input (1–12 MHz), EXCLK external clock (1–16 MHz), and selectable high-speed on-chip oscillator (1/2/4/8/16 MHz) with ±1.0% accuracy over −20°C to +85°C.

Peripheral integration includes TAU0 timer array (8 channels), SAU0 serial array unit (2 channels supporting CSI/I²C/UART), 12-bit interval timer, watchdog timer, BCD correction circuit, and programmable clock/buzzer output (PCLBUZ0). All I/O pins support N-ch open-drain configuration with on-chip pull-up resistors and external interrupt capability (INTP0–INTP7).

Key Specifications

Pinout & Package

Package: 16-pin HWQFN (3 × 3 mm, 0.5-mm pitch) with exposed die pad requiring PCB thermal pad connection (no electrical connection). Pin count and function mapping match RL78/G15 16-pin HWQFN variant per datasheet Figure 1-1 and Table 1-4.

Key Features

Applications

Equivalent & Alternatives

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

Compared with R5F12047MNA#20 and R5F12048GNA#20, the R5F12048MNA#20 uniquely combines extended temperature operation (+125°C), larger 8 KB flash for feature-rich firmware, and identical 16-pin HWQFN footprint - making it optimal for thermally demanding, upgradable industrial control designs.

Availability

R5F12048MNA#20 is available at Aetrix Electronics and suitable for industrial motor control, smart power outlets, condition-monitoring sensor nodes, and embedded HMI requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for R5F12048MNA#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, thermally demanding embedded control applications - emphasizing integrated analog, robust timing, and simplified development.

FAQ

What is the maximum operating frequency of the R5F12048MNA#20?

The R5F12048MNA#20 supports a maximum system clock frequency of 16 MHz using the high-speed on-chip oscillator. This yields a minimum instruction execution time of 0.0625 μs. External crystal (X1/X2) or EXCLK input can also run up to 12 MHz or 16 MHz respectively, subject to oscillator stability and PCB layout.

Does the R5F12048MNA#20 support in-system programming via its on-chip debug interface?

Yes, the R5F12048MNA#20 includes an on-chip debug function that supports flash programming and real-time debugging via the TOOL0, TOOLRxD, and TOOLTxD pins. It enables full read/write/erase access to code and data flash without requiring external programmers - though Renesas cautions against using this function in mass-produced end products due to flash endurance limits.

How many analog input channels does the R5F12048MNA#20 provide, and what resolution is supported?

The R5F12048MNA#20 provides 11 analog input channels (ANI0 through ANI10) with selectable 8-bit or 10-bit resolution. The ADC operates across the full VDD range (2.4–5.5 V) and includes an internal reference voltage of 0.815 V (TYP.), enabling accurate measurements without external reference components.

What is the purpose of the PIOR register in the R5F12048MNA#20, and how does it affect pin functionality?

The Peripheral I/O Redirection (PIOR) register in the R5F12048MNA#20 allows dynamic remapping of serial, timer, and interrupt functions to alternate pins - for example, assigning SCL00 to P02 instead of P03. This enhances design flexibility by enabling PCB layout reuse across firmware variants and simplifying routing in space-constrained HWQFN layouts.

Can the R5F12048MNA#20 operate reliably at +125°C ambient temperature?

Yes, the R5F12048MNA#20 is rated for continuous operation from −40°C to +125°C (M-grade industrial qualification). Its electrical specifications - including flash endurance, ADC accuracy, and oscillator stability - are guaranteed across this full range, making it suitable for under-hood automotive modules and high-temperature industrial motor controllers.