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Renesas R5F10279ANA#W5
- Part No.:
- R5F10279ANA#W5
- Manufacturer:
- Renesas
- Category:
- Microcontrollers
- Package:
- 24-WFQFN Exposed Pad
- Datasheet:
-
R5F10279ANA#W5.pdf
- Description:
- IC MCU 16BIT 12KB FLASH 24HWQFN
- Quantity:
- Payment:
- Shipping:
Inventory:3,405
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Product details
Overview
R5F10279ANA#W5 from Renesas Electronics is a 24-pin HWQFN-packaged RL78/G12 16-bit microcontroller designed for ultra-low-power embedded control in consumer and industrial applications. It integrates 12 KB code flash, 2 KB data flash, 1.5 KB RAM, a 24 MHz high-accuracy on-chip oscillator (±1.0% over –20 to +85°C), 11-channel 10-bit ADC, and dual CSI/I²C serial interfaces - enabling compact sensor node and battery-powered appliance control.
For engineers reviewing the R5F10279ANA#W5 datasheet, R5F10279ANA#W5 pinout, R5F10279ANA#W5 application, or R5F10279ANA#W5 equivalent, key selection considerations include its 24-pin HWQFN (4 × 4 mm, 0.5 mm pitch) footprint, integrated data flash with background operation (BGO), DMA support for low-CPU-overhead peripheral transfers, and AEC-Q100-unqualified but industrial-grade (–40 to +85°C) thermal rating.
Technical Context
The R5F10279ANA#W5 implements the RL78 CPU core with a 3-stage CISC pipeline, supporting instruction execution times from 0.04167 µs (24 MHz on-chip oscillator) to 1 µs (1 MHz). Its power architecture includes HALT, STOP, and SNOOZE modes achieving 63 µA/MHz active current draw at 1.8–5.5 V supply.
Peripheral integration centers on two CSI channels (SPI-compatible), one I²C channel, one UART, four 16-bit TAU timer channels, CRC calculation hardware, RAM/SFR guard functions, and programmable clock/buzzer output - all accessible via 22 GPIO pins including six key-return inputs and two 6-V-tolerant open-drain outputs.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Core | RL78 16-bit CISC CPU with 3-stage pipeline and 1 MB address space |
| Flash Memory | 12 KB code flash + 2 KB data flash with BGO and 1M rewrite cycles (TYP) |
| RAM | 1.5 KB on-chip SRAM with RAM guard protection |
| Operating Voltage | 1.8 V to 5.5 V single-supply operation enabling direct Li-ion or coin-cell interfacing |
| Power Modes | HALT (63 µA/MHz), STOP (0.52 µA), SNOOZE (low-power peripheral wake-up) |
| ADC | 10-bit resolution, 11 input channels, internal 1.45 V reference, and temperature sensor |
| Oscillator | High-speed on-chip oscillator selectable from 1–24 MHz with ±1.0% accuracy (–20 to +85°C) |
Pinout & Package
Package: HWQFN-24 (4 × 4 mm, 0.5 mm pitch), exposed die pad recommended to be connected to VSS.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| P10/ANI16/PCLBUZ0/SCK00/SCL00 | Port 1 bit 0 / Analog Input 16 / Programmable Clock Output / CSI00 Clock / I²C00 Clock | Multi-function pin supporting timer-based buzzer drive, synchronous serial communication, or analog sensing |
| P11/ANI17/SI00/RxD0/SDA00/TOOLRxD | Port 1 bit 1 / Analog Input 17 / CSI00 Data In / UART0 Receive / I²C00 Data / Debug RX | Shared serial interface pin enabling UART debug logging while retaining CSI/I²C functionality |
| P12/ANI18/SO00/TxD0/TOOLTxD | Port 1 bit 2 / Analog Input 18 / CSI00 Data Out / UART0 Transmit / Debug TX | Enables full-duplex UART debugging without external level shifters |
| P13/ANI19/TI00/TO00/INTP2 | Port 1 bit 3 / Analog Input 19 / Timer Input 0 / Timer Output 0 / Interrupt 2 | Supports edge-triggered capture, PWM generation, or external interrupt with debouncing |
| P14/ANI20/TI01/TO01/INTP3 | Port 1 bit 4 / Analog Input 20 / Timer Input 1 / Timer Output 1 / Interrupt 3 | Dual timer I/O capability enables quadrature decoding or dual-phase PWM |
| P20/ANI0/AVREFP | Port 2 bit 0 / Analog Input 0 / Positive ADC Reference | Provides dedicated high-impedance reference input for precision analog measurements |
| P21/ANI1/AVREFM | Port 2 bit 1 / Analog Input 1 / Negative ADC Reference | Enables differential analog input mode with programmable gain |
| P22/ANI2 | Port 2 bit 2 / Analog Input 2 | General-purpose analog input with internal pull-up/pull-down and TTL buffer options |
| P23/ANI3 | Port 2 bit 3 / Analog Input 3 | Supports temperature sensor readout and internal voltage monitoring |
| P40/KR0/TOOL0 | Port 4 bit 0 / Key Return 0 / Debug Interface | Enables low-power key-scan wake-up and in-circuit debug communication |
| P41/ANI22/SO01/SDA01/TI02/TO02/INTP1 | Port 4 bit 1 / Analog Input 22 / CSI01 Data Out / I²C01 Data / Timer I/O / Interrupt 1 | Combines analog sensing, serial communication, and timing functions on single pin |
| P42/ANI21/SCK01/SCL01/TI03/TO03 | Port 4 bit 2 / Analog Input 21 / CSI01 Clock / I²C01 Clock / Timer I/O | Allows dual synchronous serial buses (CSI + I²C) with independent clock domains |
| P60/KR4/SCLA0/(TxD0) | Port 6 bit 0 / Key Return 4 / I²C00 Clock / UART0 Transmit (remappable) | 6-V-tolerant I²C clock line enabling direct connection to 3.3 V or 5 V I²C slaves |
| P61/KR5/SDAA0/(RxD0) | Port 6 bit 1 / Key Return 5 / I²C00 Data / UART0 Receive (remappable) | 6-V-tolerant I²C data line with built-in slew-rate control for noise immunity |
| P121/KR3/X1/(TI03)/(INTP3) | Port 12 bit 1 / Key Return 3 / Crystal Oscillator Input / Timer Input / Interrupt | Primary crystal input with fail-safe fallback to on-chip oscillator on startup |
| P122/KR2/X2/EXCLK/(TI02)/(INTP2) | Port 12 bit 2 / Key Return 2 / Crystal Oscillator Output / External Clock Input | Supports external clock injection or crystal-based precise timing with auto-failover |
| P125/KR1/SI01/RESET | Port 12 bit 5 / Key Return 1 / CSI01 Data In / Reset Input | Active-low reset pin with internal pull-up; also serves as serial data input during normal operation |
| P137/INTP0 | Port 13 bit 7 / Interrupt 0 | Dedicated external interrupt pin with configurable edge sensitivity and debounce filtering |
| VDD | Power Supply | Single 1.8–5.5 V supply powering core, peripherals, and I/O simultaneously |
| VSS | Ground | Reference ground for analog and digital sections; must connect to exposed die pad |
Key Features
| Feature | Design Value |
|---|---|
| Data Flash with Background Operation (BGO) | Enables real-time firmware updates and parameter storage without halting program execution |
| Ultra-Low-Power HALT Mode (63 µA/MHz) | Reduces active current by >50% vs. comparable 16-bit MCUs, extending battery life in portable devices |
| On-Chip CRC Hardware Accelerator | Offloads checksum computation from CPU, reducing firmware overhead for secure boot and data integrity |
| RAM and SFR Guard Protection | Prevents accidental overwrites of critical memory regions during interrupt handling or pointer arithmetic |
| Multi-Function Pin Remapping via PIOR | Allows dynamic reassignment of serial, timer, and analog functions to optimize PCB layout and routing |
| Integrated Voltage Detector (12-Level LVD) | Provides programmable brown-out detection and reset thresholds for robust operation across varying battery states |
Applications
| Smart Home Sensor Hub | Industrial Panel Controller |
|---|---|
Use Scenario: Compact wireless node aggregating temperature, humidity, and motion data from multiple sensors before transmitting via BLE or sub-GHz radio. IC Role / Device Role / Timing Role: Central controller managing sensor polling, ADC conversion, data fusion, and low-power radio wake-up scheduling. Use Value: 12 KB flash accommodates sensor drivers and lightweight protocol stack; 2 KB data flash stores calibration coefficients and event logs without external EEPROM. | Use Scenario: Local HMI controller for HVAC or motor drives, reading analog feedback, driving LED indicators, and communicating with PLC via UART or I²C. IC Role / Device Role / Timing Role: Real-time peripheral coordinator handling analog input sampling, PWM fan control, and serial command parsing. Use Value: Dual CSI/I²C interfaces enable concurrent communication with display driver and sensor ICs; 11-channel ADC supports multi-point thermal monitoring. |
| Portable Medical Monitor | Energy-Efficient Appliance Control |
Use Scenario: Battery-powered pulse oximeter or blood glucose meter requiring precise analog measurement, low standby current, and USB/UART debug interface. IC Role / Device Role / Timing Role: Signal acquisition processor performing ADC sampling, digital filtering, and USB CDC-class communication. Use Value: Integrated 10-bit ADC with internal reference and temperature sensor eliminates external components; STOP mode draws only 0.52 µA for extended shelf life. | Use Scenario: Washing machine mainboard MCU controlling motor drivers, water valves, and user interface with minimal BOM cost. IC Role / Device Role / Timing Role: System supervisor managing power sequencing, fault detection, and UI responsiveness via key-scan and buzzer output. Use Value: Six key-return inputs simplify mechanical button interface; programmable buzzer output replaces external driver IC for status alerts. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microcontroller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| R5F10278ANA#W5 | 8 KB code flash, same 2 KB data flash, identical package and peripheral set | Suitable for cost-sensitive designs with smaller firmware footprints and no need for >8 KB code space | Select when firmware size is ≤8 KB and BOM cost reduction is prioritized over future scalability |
| R5F10379ANA#W5 | No data flash, reduced oscillator accuracy (±5.0%), no DMA or CRC, fewer serial channels (1 CSI, 0 I²C) | Targeted at simpler control tasks where background data logging or high-precision timing is not required | Choose for basic I/O control where data flash independence and enhanced peripheral security are unnecessary |
Compared with R5F10278ANA#W5 and R5F10379ANA#W5, the R5F10279ANA#W5 delivers higher code density headroom, guaranteed data retention via BGO-capable flash, and hardware-assisted reliability features - making it optimal for field-upgradable, safety-aware, or mixed-signal applications demanding long-term data integrity.
Availability
R5F10279ANA#W5 is available at Aetrix Electronics and suitable for smart home sensor hubs, industrial panel controllers, portable medical monitors, and energy-efficient appliance control requiring stable component supply and industrial-temperature operation.
Supply support for R5F10279ANA#W5 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 Japanese semiconductor manufacturer specializing in microcontrollers, analog, and power management ICs for automotive, industrial, and IoT markets.
The RL78/G12 product line delivers true low-power 16-bit MCU performance for cost-sensitive, battery-operated, and thermally constrained embedded systems - emphasizing flash flexibility, analog integration, and robust peripheral sets.
FAQ
What is the maximum operating frequency and accuracy of the on-chip oscillator in R5F10279ANA#W5?
The R5F10279ANA#W5 features a high-speed on-chip oscillator configurable up to 24 MHz with ±1.0% frequency accuracy over the –20 to +85°C ambient range. This specification applies specifically to R5F102x-series devices like the R5F10279ANA#W5 and enables reliable timing without external crystals in many cost-sensitive applications.
Does R5F10279ANA#W5 support background data flash rewriting while executing code from main flash?
Yes, the R5F10279ANA#W5 supports Background Operation (BGO) for data flash, allowing the CPU to execute instructions from code flash while simultaneously erasing or programming the 2 KB data flash memory. This capability is confirmed in the RL78/G12 datasheet (R01DS0193EJ0250) and is essential for firmware-over-the-air updates and nonvolatile parameter storage.
How many analog input channels does R5F10279ANA#W5 provide, and what is their resolution?
The R5F10279ANA#W5 provides 11 analog input channels with 10-bit resolution, supporting input ranges referenced to internal 1.45 V or external AVREFP/AVREFM. This matches the 24-pin RL78/G12 variant specification and enables simultaneous monitoring of multiple sensors in compact embedded systems.
What serial communication interfaces are integrated into R5F10279ANA#W5?
The R5F10279ANA#W5 integrates one UART channel, two CSI (SPI-compatible) channels, and two I²C channels - including one dedicated IICA0 interface with 6-V-tolerant SCL/SDA pins. These interfaces are confirmed for the R5F1027x series in the RL78/G12 datasheet and support concurrent communication with displays, sensors, and host processors.
Is R5F10279ANA#W5 pin-compatible with other RL78/G12 24-pin variants such as R5F10278ANA#W5?
Yes, the R5F10279ANA#W5 shares identical pinout, package (HWQFN-24), and peripheral mapping with other R5F1027x-series 24-pin devices including R5F10278ANA#W5 and R5F10277ANA#W5. This allows direct substitution within the same family for firmware upgrades or memory scaling without PCB redesign.
R5F10279ANA#W5 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Renesas
- Package/Case:
- 24-WFQFN Exposed Pad
- Series:
- RL78/G12
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- 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:
- 12KB (12K x 8)
- Program Memory Type:
- FLASH
- EEPROM Size:
- 2K x 8
- RAM Size:
- 1K x 8
- Voltage - Supply (Vcc/Vdd):
- 1.8V ~ 5.5V
- Data Converters:
- A/D 11x8/10b
- Oscillator Type:
- Internal
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
R5F10279ANA#W5 FAQ
1.How can I place an order for R5F10279ANA#W5 through Aetrix?
Please submit a Request for Quotation (RFQ) for R5F10279ANA#W5 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 R5F10279ANA#W5 reliable?
The price and inventory of R5F10279ANA#W5 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for R5F10279ANA#W5 is usually 5 days.
3.What payment methods are accepted for R5F10279ANA#W5?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for R5F10279ANA#W5 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for R5F10279ANA#W5?
R5F10279ANA#W5 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your R5F10279ANA#W5 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 R5F10279ANA#W5?
For technical support, including R5F10279ANA#W5 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your R5F10279ANA#W5 requirements.
6.How does Aetrix verify that R5F10279ANA#W5 is sourced from the original manufacturer or authorized distributors?
All R5F10279ANA#W5 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 R5F10279ANA#W5 meets industry standards.
7.What is the process for return or replacement of R5F10279ANA#W5?
All R5F10279ANA#W5 units undergo pre-shipment inspection (PSI). If there is an issue with R5F10279ANA#W5, 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 R5F10279ANA#W5 part is unused and in its original packaging.
Return procedure for R5F10279ANA#W5:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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