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Renesas R5F10278ANA#65
- Part No.:
- R5F10278ANA#65
- Manufacturer:
- Renesas
- Category:
- Microcontrollers
- Package:
- 24-WFQFN Exposed Pad
- Datasheet:
-
R5F10278ANA#65.pdf
- Description:
- 16-BIT GENERAL MCU RL78/G12 8K 2
- Quantity:
- Payment:
- Shipping:
Inventory:3,285
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Product details
Overview
R5F10278ANA#65 from Renesas Electronics is a 24-pin HWQFN-packaged 16-bit RL78/G12 microcontroller with 8 KB code flash, 2 KB data flash, and 512 B RAM, operating at 1.8–5.5 V and delivering 31 DMIPS at 24 MHz for low-power embedded control in consumer-grade applications (–40°C to +85°C). It integrates an 11-channel 10-bit ADC, dual CSI/I²C serial interfaces, UART, 4-channel 16-bit TAU timer, DMA controller, and on-chip debug.
For engineers reviewing the R5F10278ANA#65 datasheet, R5F10278ANA#65 pinout, R5F10278ANA#65 application, or R5F10278ANA#65 equivalent, this page delivers verified technical context, package-validated pin functions, real-world use-value analysis for home appliances and sensor nodes, and two confirmed alternative parts with documented functional and application-level differences.
Technical Context
The R5F10278ANA#65 implements the RL78 CPU core with CISC architecture and 3-stage pipeline, supporting minimum instruction execution time of 0.04167 µs at 24 MHz using the high-accuracy ±1.0% on-chip oscillator (–20°C to +85°C). Its memory subsystem includes 8 KB code flash (1 KB block size), 2 KB data flash with background operation (BGO) and 1M rewrite cycles, and 512 B RAM.
Peripheral integration includes dual CSI channels (SPI-compatible), dual simplified I²C channels, one UART channel, four 16-bit timer channels with PWM capability, 12-bit interval timer, watchdog timer, CRC engine, RAM/SFR guard, and key interrupt support - all enabled under HALT/STOP/SNOOZE low-power modes achieving 63 µA/MHz active current.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Core Architecture | RL78 16-bit CISC CPU with 3-stage pipeline and 1 MB address space |
| Operating Voltage | 1.8 V to 5.5 V - enables direct interface with 1.8/2.5/3.3 V logic and battery-powered operation |
| Flash Memory | 8 KB code flash + 2 KB data flash - supports secure self-programming and BGO for firmware updates without halting execution |
| ADC | 10-bit resolution, 11 input channels, internal 1.45 V reference - suitable for precision analog sensing in cost-sensitive systems |
| Timers | 4-channel 16-bit TAU timer with PWM output capability - provides flexible timing, motor control, and signal generation |
| Low-Power Modes | HALT, STOP, SNOOZE - achieves 63 µA/MHz active current and sub-µA standby, extending battery life in portable devices |
| Serial Interfaces | 2 × CSI (SPI-compatible), 2 × simplified I²C, 1 × UART - enables concurrent communication with sensors, displays, and host controllers |
Pinout & Package
Package: HWQFN-24 (4 mm × 4 mm, 0.5 mm pitch) with exposed die pad recommended to be connected to VSS.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| P00–P03 | Port 0 I/O (KR6–KR9) | Key return inputs or general-purpose CMOS I/O; P00–P03 support N-ch open-drain (VDD-tolerant) mode |
| P10–P14 | Port 1 I/O (ANI16–ANI20, SCK00/SCL00, SI00/RxD0, SO00/TxD0, TO00/INTP2, TO01/INTP3) | Primary serial and analog interface bank - configurable for UART, CSI, I²C, or ADC input |
| P20–P23 | Port 2 I/O (ANI0–ANI3, AVREFP/AVREFM) | Analog front-end: dedicated AVREFP/AVREFM pins enable ratiometric ADC measurements with external sensors |
| P40–P42 | Port 4 I/O (TOOL0, ANI21/ANI22, SCK01/SCL01, SO01/SDA01, SI01/RESET) | Secondary serial interface + tool interface + reset - SI01 doubles as hardware reset with internal pull-up |
| P60/P61 | I²C bus interface (SCLA0/SDAA0) | Dedicated 6 V-tolerant I²C pins - support mixed-voltage system interfacing without level shifters |
| P121/P122 | Crystal oscillator inputs (X1/X2/EXCLK) | Supports external crystal (1–20 MHz) or clock source for precise timing-critical applications |
| P125 | Reset input (SI01/RESET) | Active-low reset with internal pull-up - compatible with standard push-button or supervisor IC reset signals |
| VDD/VSS | Power supply and ground | Single-supply operation; exposed pad must be soldered to VSS plane for thermal and EMI performance |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low power consumption | 63 µA/MHz active current with HALT/STOP/SNOOZE modes - extends battery life in wireless sensor nodes and remote controls |
| Data flash with BGO | 2 KB data flash supports background rewriting while executing code - enables seamless over-the-air parameter updates |
| On-chip safety functions | CRC engine, RAM guard, and SFR guard - detect memory corruption and prevent unintended register writes in safety-aware designs |
| Flexible serial connectivity | Dual CSI + dual simplified I²C + UART - allows simultaneous connection to SPI sensors, I²C EEPROMs, and host MCUs without external bridges |
| High-accuracy on-chip oscillator | ±1.0% accuracy (–20°C to +85°C) - eliminates need for external crystal in cost-sensitive applications like home appliance UIs |
Applications
| Home Appliance Control | Wireless Sensor Node |
|---|---|
|
Use Scenario: Microcontroller in smart thermostat housing managing temperature sensing, display, button inputs, and HVAC relay control. IC Role / Device Role / Timing Role: Main system controller executing closed-loop PID algorithms, driving buzzer/clock outputs, and handling I²C communication with environmental sensors. Use Value: Integrated 11-channel ADC and programmable clock/buzzer output eliminate external components; 8 KB flash accommodates OTA update stack and application logic. |
Use Scenario: Battery-powered node collecting ambient light, humidity, and motion data for BLE gateway transmission. IC Role / Device Role / Timing Role: Low-power sensor aggregator using SNOOZE mode between readings, with BGO-enabled data logging to on-chip data flash. Use Value: 63 µA/MHz active current and sub-µA STOP mode extend coin-cell life beyond 2 years; dual CSI/I²C interfaces connect diverse sensors without level shifters. |
| Industrial HMI Panel | Consumer IoT Gateway |
|
Use Scenario: Front-panel controller in industrial pump monitor displaying status LEDs, reading rotary encoder inputs, and communicating via UART with main PLC. IC Role / Device Role / Timing Role: Dedicated HMI processor handling key interrupts, PWM-driven LED dimming, and UART protocol translation. Use Value: Key interrupt support (6-key matrix) and 4-channel TAU timer with PWM reduce firmware overhead; 2 KB data flash stores calibration offsets and user preferences. |
Use Scenario: Central hub in smart home system aggregating Zigbee/Z-Wave sub-devices and bridging to Wi-Fi via UART-connected module. IC Role / Device Role / Timing Role: Protocol bridge and local decision engine performing rule-based automation (e.g., lighting schedules) without cloud dependency. Use Value: Dual simplified I²C channels manage multiple sensor clusters; on-chip CRC and RAM guard ensure reliable operation during frequent firmware updates. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microcontroller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| R5F10279ANA#65 | 12 KB code flash, same 2 KB data flash, identical pinout and peripherals | Requires larger firmware image; suited for applications needing bootloader + application partitioning | Select when firmware size exceeds 8 KB but full peripheral set and low-power profile must be retained |
| R5F10378ANA#65 | No data flash; reduced serial interface count (1 CSI, 0 simplified I²C); no DMA or CRC/RAM/SFR guard | Lacks BGO and safety features; lower cost for basic control tasks without field updates or functional safety needs | Choose for cost-sensitive, static-firmware applications where data logging and memory protection are unnecessary |
Compared with R5F10278ANA#65, R5F10279ANA#65 offers headroom for complex firmware while maintaining identical low-power behavior and peripheral richness, whereas R5F10378ANA#65 sacrifices data flash, safety features, and interface flexibility to reduce bill-of-materials cost in non-updatable systems.
Availability
R5F10278ANA#65 is available at Aetrix Electronics and suitable for home appliance control, wireless sensor nodes, industrial HMI panels, and consumer IoT gateways requiring stable component supply across production lifecycles.
Supply support for R5F10278ANA#65 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/G12 product line delivers true low-power 16-bit MCU performance for cost-sensitive general-purpose applications, emphasizing energy efficiency, integrated analog, and robust peripheral sets for rapid system integration.
FAQ
What is the maximum operating frequency and corresponding DMIPS rating of the R5F10278ANA#65?
The R5F10278ANA#65 operates at up to 24 MHz using its high-accuracy on-chip oscillator and delivers 31 DMIPS of processing performance. This benchmark reflects actual integer compute throughput measured under RL78 core architecture constraints, enabling responsive real-time control in applications such as motor drivers and sensor fusion engines where deterministic timing matters.
Does the R5F10278ANA#65 support background data flash rewriting while executing application code?
Yes, the R5F10278ANA#65 supports background operation (BGO) for its 2 KB data flash memory. This allows the CPU to execute instructions from program memory while simultaneously rewriting data flash - essential for implementing non-disruptive firmware parameter updates, calibration storage, or event logging in deployed systems without service interruption.
What are the key low-power modes supported by the R5F10278ANA#65 and their typical current consumption?
The R5F10278ANA#65 supports HALT, STOP, and SNOOZE modes with active current as low as 63 µA/MHz. In STOP mode, current drops to sub-µA levels, and SNOOZE enables selective peripheral wake-up (e.g., UART receive or ADC trigger) while keeping CPU halted - making it ideal for battery-operated remote controls and environmental monitors requiring multi-year operation.
How many analog input channels and what ADC resolution does the R5F10278ANA#65 provide?
The R5F10278ANA#65 integrates an 11-channel, 10-bit successive-approximation ADC with internal 1.45 V reference voltage and dedicated AVREFP/AVREFM pins. This configuration supports ratiometric measurements with external sensors and delivers sufficient resolution for temperature monitoring, potentiometer reading, and basic battery voltage supervision in consumer and industrial edge devices.
Is the R5F10278ANA#65 pin-compatible with other RL78/G12 variants in the same 24-pin HWQFN package?
Yes, the R5F10278ANA#65 shares identical pinout and package (HWQFN-24, PWQN0024KF-A) with all R5F1027xANA#xx and R5F1037xANA#xx variants. This enables drop-in replacement within the same family - for example, upgrading to R5F10279ANA#65 for more flash or downgrading to R5F10378ANA#65 for cost reduction - provided firmware and peripheral usage align with the target variant's feature set.
R5F10278ANA#65 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Renesas
- Package/Case:
- 24-WFQFN Exposed Pad
- Series:
- RL78/G12
- Packaging:
- Tray
- Product Status:
- Active
- Programmable:
- -
- 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:
- External, Internal
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
R5F10278ANA#65 FAQ
1.How can I place an order for R5F10278ANA#65 through Aetrix?
Please submit a Request for Quotation (RFQ) for R5F10278ANA#65 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 R5F10278ANA#65 reliable?
The price and inventory of R5F10278ANA#65 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for R5F10278ANA#65 is usually 5 days.
3.What payment methods are accepted for R5F10278ANA#65?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for R5F10278ANA#65 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for R5F10278ANA#65?
R5F10278ANA#65 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your R5F10278ANA#65 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 R5F10278ANA#65?
For technical support, including R5F10278ANA#65 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your R5F10278ANA#65 requirements.
6.How does Aetrix verify that R5F10278ANA#65 is sourced from the original manufacturer or authorized distributors?
All R5F10278ANA#65 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 R5F10278ANA#65 meets industry standards.
7.What is the process for return or replacement of R5F10278ANA#65?
All R5F10278ANA#65 units undergo pre-shipment inspection (PSI). If there is an issue with R5F10278ANA#65, 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 R5F10278ANA#65 part is unused and in its original packaging.
Return procedure for R5F10278ANA#65:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
R5F10278ANA#65 Tags
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