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Renesas R5F10278GNA#25
- Part No.:
- R5F10278GNA#25
- Manufacturer:
- Renesas
- Category:
- Microcontrollers
- Package:
- 24-WFQFN Exposed Pad
- Datasheet:
-
R5F10278GNA#25.pdf
- Description:
- IC MCU 16BIT 8KB FLASH 24HWQFN
- Quantity:
- Payment:
- Shipping:
Inventory:1,515
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Product details
Overview
R5F10278GNA#25 from Renesas Electronics is a 24-pin HWQFN-packaged RL78/G12 16-bit microcontroller designed for industrial embedded control at extended temperature (–40°C to +105°C). It integrates 8 KB code flash, 2 KB data flash, 512 B RAM, 10-bit A/D converter (11 channels), 2-channel DMA, and dual serial interfaces (2× CSI, 2× I²C, 1× UART) - enabling low-power sensor node and motor control applications with on-the-fly data logging.
For engineers reviewing the R5F10278GNA#25 datasheet, R5F10278GNA#25 pinout, R5F10278GNA#25 application, or R5F10278GNA#25 equivalent, key selection considerations include its G-grade industrial temperature rating, integrated data flash for firmware parameter storage, 24-pin HWQFN (4 × 4 mm, 0.5-mm pitch) footprint, and support for background data flash rewriting during program execution.
Technical Context
The R5F10278GNA#25 implements the RL78 CPU core with 3-stage pipeline CISC architecture, delivering 31 DMIPS at 24 MHz while consuming only 63 μA/MHz in active mode. Its memory subsystem includes 8 KB code flash (1 KB block size), 2 KB data flash with 1M-cycle endurance and background operation (BGO), and 512 B RAM - all operating across 1.8–5.5 V supply.
Peripherals are optimized for deterministic real-time control: dual 16-bit timer arrays (TAU0, 4 channels), watchdog timer, 12-bit interval timer, high-accuracy ±1.0% high-speed on-chip oscillator (1–24 MHz selectable), and safety features including CRC calculation unit, RAM guard, and SFR guard - all confirmed for R5F102-series devices per datasheet Section 1.3.3.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Core | RL78 16-bit CISC with 3-stage pipeline, 31 DMIPS @ 24 MHz |
| Flash Memory | 8 KB code flash (1 KB erase blocks) + 2 KB data flash with BGO and 1M rewrite cycles |
| RAM | 512 B on-chip RAM, supporting DMA transfers between SFR and RAM in 2 clocks |
| Operating Voltage | 1.8 V to 5.5 V single supply - enables direct interface with 1.8/2.5/3.3 V peripherals |
| Temperature Range | –40°C to +105°C (G-grade industrial), validated for continuous operation in harsh environments |
| A/D Converter | 10-bit resolution, 11 input channels, internal 1.45 V reference, and integrated temperature sensor |
| Serial Interfaces | 2× Simplified SPI (CSI), 2× Simplified I²C, 1× UART - all configurable via PIOR register |
| Power Modes | HALT, STOP, and SNOOZE modes - achieving ultra-low standby current below 0.52 μA (typ.) |
Pinout & Package
Package: 24-pin HWQFN (4 × 4 mm, 0.5-mm pitch), exposed die pad (to be connected to VSS), compliant with PWQN0024KF-A and PWQN0024KH-A mechanical specifications.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| P00–P03 | Port 0 I/O | 4 general-purpose CMOS I/O pins; P02/P01 support alternate CSI/SCL/SDA functions |
| P10–P14 | Port 1 I/O | 5 I/O pins with analog input (ANI16–ANI20), UART0, CSI00, IIC00, and interrupt capability |
| P20–P23 | Analog Input / Reference | ANI0–ANI3 with AVREFP/AVREFM - enables ratiometric A/D measurement and sensor biasing |
| P40–P42 | Port 4 I/O | P40 = TOOL0 debug I/O; P41/P42 = ANI22/ANI21 with CSI01/IIC01 alternate functions |
| P60/P61 | I²C Interface | SCLA0/SDAA0 - N-ch open-drain I/O with 6 V tolerance, supports standard/fast-mode I²C |
| P121/P122 | Crystal Oscillator | X1/X2 inputs for external crystal (1–20 MHz); also usable as TI03/TI02 interrupt inputs |
| P125 | Reset & Debug | SI01/RESET - active-low reset with internal pull-up; supports on-chip debug via TOOL interface |
| VDD/VSS | Power & Ground | Single 1.8–5.5 V supply; VSS connects to exposed die pad for thermal and noise performance |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low power consumption | 63 μA/MHz active current; sub-μA HALT/STOP modes enable battery-powered longevity |
| Data flash with BGO | 2 KB data flash supports concurrent program execution and nonvolatile parameter updates |
| G-grade industrial reliability | –40°C to +105°C operation with ±1.0% oscillator accuracy over full range - no derating required |
| Integrated safety mechanisms | CRC unit, RAM guard, and SFR guard provide hardware-level fault detection for functional safety designs |
| Flexible peripheral routing | Peripheral I/O Redirection Register (PIOR) enables dynamic remapping of UART/CSI/I²C to multiple pins |
| Dual high-precision timers | TAU0 with 4 independent 16-bit channels supports PWM generation, input capture, and interval timing |
Applications
| Industrial Motor Control | Smart Sensor Node |
|---|---|
Use Scenario: Brushless DC motor commutation in HVAC blowers with closed-loop speed regulation and thermal monitoring. IC Role / Device Role / Timing Role: Main controller executing FOC algorithm, reading hall sensors/ADC, generating 3-phase PWM, and managing CAN/UART diagnostics. Use Value: Integrated 10-bit ADC (11 ch), TAU0 PWM outputs, and data flash for calibration storage eliminate external components and reduce BOM cost. |
Use Scenario: Battery-powered environmental sensor hub collecting temperature, humidity, and CO₂ via I²C peripherals. IC Role / Device Role / Timing Role: Low-power host MCU managing sensor polling, data aggregation, and wireless module wake-up via UART/CSI. Use Value: SNOOZE mode + BGO data flash allows background logging while preserving 10-year battery life at 1-minute sampling intervals. |
| Programmable Power Supply | Industrial HMI Panel |
Use Scenario: Digitally controlled bench power supply with voltage/current regulation, front-panel keypad, and USB-CDC interface. IC Role / Device Role / Timing Role: System controller handling DAC feedback loops, key return scanning (KR0–KR9), buzzer output, and USB bridge communication. Use Value: On-chip key interrupt, programmable clock/buzzer output (PCLBUZ0), and 24-pin compact footprint simplify front-end design. |
Use Scenario: Touch-enabled operator interface for PLC-controlled packaging machinery with status LEDs and alarm indicators. IC Role / Device Role / Timing Role: Real-time UI processor driving LED drivers, reading tactile buttons, and communicating with main controller via UART. Use Value: 26 GPIOs (including N-ch open-drain), 12-bit interval timer for LED dimming, and G-grade temp rating ensure robustness in factory-floor vibration/heat. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar 16-bit microcontroller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| R5F1027AGNA#25 | 16 KB code flash, same 8 KB data flash, identical package and peripheral set | Higher code density for complex control algorithms or bootloader + application partitioning | Select when firmware exceeds 8 KB or requires future feature expansion without PCB change |
| R5F10378GNA#25 | No data flash; reduced oscillator accuracy (±5.0%); no DMA, CRC, RAM/SFR guard | Cost-sensitive applications where parameter storage and functional safety are not required | Choose only if data flash and safety features are unnecessary - not drop-in compatible due to missing peripherals |
Compared with R5F10278GNA#25, R5F1027AGNA#25 offers headroom for larger firmware but shares identical timing, power, and interface behavior; R5F10378GNA#25 sacrifices data retention and safety features to reduce cost, requiring software redesign for flash management and error handling.
Availability
R5F10278GNA#25 is available at Aetrix Electronics and suitable for industrial motor control, smart sensor nodes, programmable power supplies, and HMI panels requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for R5F10278GNA#25 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, and power solutions for automotive, industrial, and IoT markets.
The RL78/G12 product line delivers true low-power 16-bit MCUs targeting cost-sensitive industrial and consumer applications requiring extended temperature operation, integrated data storage, and functional safety features - all within compact 20–30 pin packages.
FAQ
What is the maximum operating frequency and instruction throughput of the R5F10278GNA#25?
The R5F10278GNA#25 achieves a maximum system clock of 24 MHz using its high-speed on-chip oscillator, delivering 31 DMIPS of processing performance. Its RL78 CPU core executes instructions in as little as 0.04167 μs at 24 MHz, with minimum instruction time adjustable down to 1 μs for ultra-low-power operation at 1 MHz - confirmed in Section 1.1 of the R01DS0193EJ0250 datasheet.
Does the R5F10278GNA#25 support background data flash rewriting while executing code from main flash?
Yes, the R5F10278GNA#25 supports Background Operation (BGO) for its 2 KB data flash memory. This allows the CPU to execute instructions from code flash while simultaneously erasing or programming data flash sectors - essential for real-time parameter updates without interrupting control loops, as specified in Section 1.1 and Chapter 3 of the RL78/G12 User's Manual.
What are the key differences between R5F10278GNA#25 and R5F10378GNA#25?
The R5F10278GNA#25 includes 2 KB data flash, 2-channel DMA, CRC unit, RAM guard, and SFR guard - features absent in R5F10378GNA#25. Additionally, its high-speed on-chip oscillator has ±1.0% accuracy over –40°C to +105°C, versus ±5.0% for the R5F10378GNA#25. These differences make R5F10278GNA#25 suitable for safety-critical or data-logging applications where R5F10378GNA#25 is not functionally equivalent.
Which serial interfaces are available on the R5F10278GNA#25 and how are they mapped to pins?
The R5F10278GNA#25 provides 2× Simplified SPI (CSI), 2× Simplified I²C, and 1× UART. CSI00 and CSI01 are routed to P10–P12 and P41–P42 respectively; IIC00 and IIC01 appear on P60/P61 and P41/P42; UART0 uses P11/P12. All mappings are configurable via the Peripheral I/O Redirection Register (PIOR), as detailed in Sections 1.4.2 and 1.7 of the datasheet.
What is the purpose of the REGC pin, and is it present on the R5F10278GNA#25?
The REGC pin is used to stabilize the internal voltage regulator and is required only on 30-pin RL78/G12 devices (e.g., R5F102AAx). It is not present on the 24-pin R5F10278GNA#25 - confirmed by absence in the 24-pin pin configuration diagram (Page 8) and block diagram (Page 12) of R01DS0193EJ0250. No external capacitor is needed for this variant.
R5F10278GNA#25 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Renesas
- Package/Case:
- 24-WFQFN Exposed Pad
- Series:
- RL78/G12
- Packaging:
- Tray
- Product Status:
- Last Time Buy
- Programmable:
- Not Verified
- Core Processor:
- RL78
- Core Size:
- 16-Bit
- Speed:
- 24MHz
- Connectivity:
- CSI, I2C, UART/USART
- Peripherals:
- DMA, LVD, POR, PWM, WDT
- Number of I/O:
- 18
- Program Memory Size:
- 8KB (8K x 8)
- Program Memory Type:
- FLASH
- EEPROM Size:
- 2K x 8
- RAM Size:
- 768 x 8
- Voltage - Supply (Vcc/Vdd):
- 1.8V ~ 5.5V
- Data Converters:
- A/D 11x8/10b
- Oscillator Type:
- Internal
- Operating Temperature:
- -40°C ~ 105°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
R5F10278GNA#25 FAQ
1.How can I place an order for R5F10278GNA#25 through Aetrix?
Please submit a Request for Quotation (RFQ) for R5F10278GNA#25 on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for R5F10278GNA#25 reliable?
The price and inventory of R5F10278GNA#25 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for R5F10278GNA#25 is usually 5 days.
3.What payment methods are accepted for R5F10278GNA#25?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for R5F10278GNA#25 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for R5F10278GNA#25?
R5F10278GNA#25 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your R5F10278GNA#25 order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for R5F10278GNA#25?
For technical support, including R5F10278GNA#25 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your R5F10278GNA#25 requirements.
6.How does Aetrix verify that R5F10278GNA#25 is sourced from the original manufacturer or authorized distributors?
All R5F10278GNA#25 products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that R5F10278GNA#25 meets industry standards.
7.What is the process for return or replacement of R5F10278GNA#25?
All R5F10278GNA#25 units undergo pre-shipment inspection (PSI). If there is an issue with R5F10278GNA#25, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The R5F10278GNA#25 part is unused and in its original packaging.
Return procedure for R5F10278GNA#25:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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