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Renesas R5F10277ANA#U0
- Part No.:
- R5F10277ANA#U0
- Manufacturer:
- Renesas
- Category:
- Microcontrollers
- Package:
- 24-WFQFN Exposed Pad
- Datasheet:
-
R5F10277ANA#U0.pdf
- Description:
- IC MCU 16BIT 4KB FLASH 24HWQFN
- Quantity:
- Payment:
- Shipping:
Inventory:2,311
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Product details
Overview
R5F10277ANA#U0 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 4 KB code flash, 2 KB data flash, 256 B RAM, 10-bit A/D converter (11 channels), 4-channel 16-bit timer, UART/CSI/I²C serial interfaces, and operates from 1.8 V to 5.5 V with true low-power consumption (63 μA/MHz).
For engineers reviewing the R5F10277ANA#U0 datasheet, R5F10277ANA#U0 pinout, R5F10277ANA#U0 application, or R5F10277ANA#U0 equivalent, key selection criteria include its 24-pin HWQFN footprint, integrated data flash for firmware updates, on-chip CRC and RAM guard for functional safety, and support for STOP/HALT/SNOOZE low-power modes in battery-powered sensor nodes and appliance controllers.
Technical Context
The R5F10277ANA#U0 implements the RL78 CPU core with a 3-stage pipeline CISC architecture, delivering 31 DMIPS at 24 MHz. Its memory subsystem includes separate code flash (4 KB) and data flash (2 KB) with background operation (BGO) for concurrent execution and data rewriting.
Peripheral integration centers on mixed-signal control: dual CSI channels (SPI-compatible), one UART, two simplified I²C interfaces, 11-channel 10-bit ADC with internal reference (1.45 V), and DMA controller with 2 channels for efficient peripheral-to-memory transfers-enabling deterministic real-time response in motor control and power management systems.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Core Architecture | RL78 16-bit CISC with 3-stage pipeline, 1 MB address space |
| Operating Voltage | 1.8 V to 5.5 V - supports direct interface with 1.8/2.5/3.3 V logic and battery-backed operation |
| Flash Memory | 4 KB code flash + 2 KB data flash - enables field firmware updates without external EEPROM |
| RAM Size | 256 B - sufficient for stack, variables, and interrupt context in compact control loops |
| A/D Converter | 10-bit resolution, 11 input channels, internal 1.45 V reference - eliminates need for external voltage reference in sensor signal conditioning |
| Low-Power Modes | HALT, STOP, SNOOZE - achieves 63 μA/MHz active current and sub-μA STOP mode for extended battery life |
| Package | HWQFN-24, 4 × 4 mm, 0.5 mm pitch - compact footprint suitable for space-constrained PCBs |
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 |
|---|---|---|
| P125/KR1/SI01/RESET | Reset Input / SPI Data In | Active-low hardware reset with internal pull-up; also serves as SPI master input in CSI01 channel |
| P137/INTP0 | External Interrupt Input | Dedicated edge-triggered interrupt pin for wake-up from STOP mode or event capture |
| P20/ANI0/AVREFP | Analog Input / ADC Reference Positive | Primary analog input channel and positive reference for 10-bit ADC - enables ratiometric sensing |
| P21/ANI1/AVREFM | Analog Input / ADC Reference Negative | Negative reference input for differential ADC measurements and offset calibration |
| P40/KR0/TOOL0 | Key Return / Debug Interface | Supports capacitive touch key scanning and on-chip debug communication via TOOL interface |
| P60/KR4/SCLA0/(TxD0) | I²C Clock / UART Transmit | Configurable as I²C clock line or UART TX output - enables shared pin usage for multi-protocol designs |
| VDD / VSS | Power Supply / Ground | Dual power pins ensure stable core and I/O rail operation; exposed pad enhances thermal performance |
Key Features
| Feature | Design Value |
|---|---|
| Data Flash with BGO | 2 KB data flash supports background operation - allows program execution while logging sensor data or updating configuration |
| On-chip CRC Engine | Hardware-accelerated CRC-16/32 computation - enables fast firmware integrity checks and secure boot verification |
| RAM Guard Protection | Dedicated RAM guard circuit detects unintended writes - prevents corruption of critical variables during fault conditions |
| Multi-Voltage I/O | I/O ports tolerate 1.8 V, 2.5 V, and 3.3 V logic levels - simplifies interfacing with heterogeneous peripheral ICs |
| High-Accuracy Oscillator | ±1.0% accuracy (–20 to +85°C) - eliminates need for external crystal in cost-sensitive applications requiring <1% timing tolerance |
Applications
| Home Appliance Control | Industrial Sensor Node |
|---|---|
Use Scenario: Microcontroller in washing machine main board managing motor drive, water level sensing, and user interface. IC Role / Device Role / Timing Role: Central control unit executing real-time PID motor control, reading 10-bit ADC inputs from pressure/temperature sensors, and driving buzzer outputs via PCLBUZ0. Use Value: Integrated 4 KB code flash stores motor control algorithms; 2 KB data flash logs error codes and usage statistics without external memory. | Use Scenario: Battery-powered environmental monitor measuring temperature, humidity, and CO₂ in HVAC ducts. IC Role / Device Role / Timing Role: Low-power sensor hub collecting data via 11-channel ADC and UART-connected gas sensors, then transmitting via RS-485 using UART0. Use Value: 63 μA/MHz active current and STOP mode extend 2xAA battery life beyond 5 years; on-chip voltage detector triggers brown-out reset at 1.88 V. |
| Smart Meter Interface | Consumer IoT Gateway |
Use Scenario: Communication interface module in electricity meter connecting metrology ICs and PLC modem. IC Role / Device Role / Timing Role: Protocol bridge between SPI-based metrology IC (via CSI00) and I²C-based PLC transceiver (via IICA0), handling data framing and checksums. Use Value: Dual CSI and dual simplified I²C channels enable simultaneous high-speed metrology readout and low-speed modem control; CRC engine validates frame integrity. | Use Scenario: Hub controller in smart lighting system coordinating Zigbee/Z-Wave radios and LED driver ICs. IC Role / Device Role / Timing Role: Peripheral manager using UART for radio AT-command interface, PWM-capable TAU0 timers for dimming control, and key interrupt for physical button inputs. Use Value: 4-channel 16-bit timer provides independent PWM outputs for RGBW LED channels; N-ch open-drain I/O pins directly drive 5 V logic-level radios. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microcontroller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| R5F10278ANA#U0 | 8 KB code flash, same 2 KB data flash, identical package and peripherals | Higher firmware storage capacity for complex protocol stacks or OTA update partitions | Select when >4 KB application code size or dual-bank firmware update capability is required |
| R5F10377ANA#U0 | No data flash, no CRC/RAM guard, ±5.0% oscillator accuracy, single CSI channel | Lacks data logging and functional safety features; lower timing precision limits closed-loop control accuracy | Select only for cost-sensitive, non-safety-critical applications where data flash and CRC are unnecessary |
Compared with R5F10278ANA#U0, the R5F10277ANA#U0 trades flash capacity for lower cost while retaining full safety and low-power features; versus R5F10377ANA#U0, it adds essential reliability functions (CRC, RAM guard) and tighter oscillator tolerance critical for time-sensitive control loops.
Availability
R5F10277ANA#U0 is available at Aetrix Electronics and suitable for home appliance control, industrial sensor nodes, smart meter interfaces, and consumer IoT gateways requiring stable component supply across production lifecycles.
Supply support for R5F10277ANA#U0 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 headquartered in Japan, specializing in microcontrollers, analog, power, and SoC solutions for automotive, industrial, and IoT markets.
The RL78/G12 product line delivers ultra-low-power 16-bit MCUs optimized for cost-sensitive, battery-operated, and safety-aware embedded control applications - emphasizing energy efficiency, integrated peripherals, and functional safety features like CRC and RAM guard.
FAQ
What is the maximum operating frequency of the R5F10277ANA#U0?
The R5F10277ANA#U0 supports a maximum high-speed on-chip oscillator frequency of 24 MHz, delivering 31 DMIPS performance. It also accepts external crystal or ceramic resonator inputs up to 20 MHz (1.8–5.5 V supply) or 16 MHz (1.8–2.7 V supply), enabling precise timing for communication protocols and motor control loops.
Does the R5F10277ANA#U0 include data flash memory?
Yes, the R5F10277ANA#U0 includes 2 KB of dedicated data flash memory with background operation (BGO) capability. This allows the R5F10277ANA#U0 to execute code from program memory while simultaneously rewriting data flash - essential for logging, parameter storage, and firmware updates without halting system operation.
What low-power modes does the R5F10277ANA#U0 support?
The R5F10277ANA#U0 supports HALT, STOP, and SNOOZE modes. In STOP mode, current consumption drops below 1 μA; HALT mode reduces active current to 63 μA/MHz. Wake-up sources include external interrupts (INTP0–INTP3), key return inputs, and timer events - making the R5F10277ANA#U0 ideal for battery-powered remote sensors and portable devices.
Is the R5F10277ANA#U0 pin-compatible with other RL78/G12 24-pin variants?
Yes, all RL78/G12 24-pin HWQFN packages-including R5F10277ANA#U0, R5F10278ANA#U0, and R5F10377ANA#U0-share identical pinouts and mechanical dimensions. This allows direct substitution within the same footprint, though firmware must be validated for differences in flash size, data flash presence, and peripheral availability before deployment.
What safety features are integrated into the R5F10277ANA#U0?
The R5F10277ANA#U0 integrates CRC calculation hardware, RAM guard, and SFR guard - features absent in the R5F103 series. These provide runtime detection of memory corruption and unauthorized register access, supporting IEC 61508 SIL-2 and ISO 26262 ASIL-B functional safety requirements in industrial and automotive auxiliary systems.
R5F10277ANA#U0 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Renesas
- Package/Case:
- 24-WFQFN Exposed Pad
- Series:
- RL78/G12
- Packaging:
- Tray
- 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:
- 4KB (4K x 8)
- Program Memory Type:
- FLASH
- EEPROM Size:
- 2K x 8
- RAM Size:
- 512 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:
R5F10277ANA#U0 FAQ
1.How can I place an order for R5F10277ANA#U0 through Aetrix?
Please submit a Request for Quotation (RFQ) for R5F10277ANA#U0 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 R5F10277ANA#U0 reliable?
The price and inventory of R5F10277ANA#U0 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for R5F10277ANA#U0 is usually 5 days.
3.What payment methods are accepted for R5F10277ANA#U0?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for R5F10277ANA#U0 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for R5F10277ANA#U0?
R5F10277ANA#U0 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your R5F10277ANA#U0 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 R5F10277ANA#U0?
For technical support, including R5F10277ANA#U0 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your R5F10277ANA#U0 requirements.
6.How does Aetrix verify that R5F10277ANA#U0 is sourced from the original manufacturer or authorized distributors?
All R5F10277ANA#U0 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 R5F10277ANA#U0 meets industry standards.
7.What is the process for return or replacement of R5F10277ANA#U0?
All R5F10277ANA#U0 units undergo pre-shipment inspection (PSI). If there is an issue with R5F10277ANA#U0, 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 R5F10277ANA#U0 part is unused and in its original packaging.
Return procedure for R5F10277ANA#U0:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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