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Renesas R5F10278ANA#25
- Part No.:
- R5F10278ANA#25
- Manufacturer:
- Renesas
- Category:
- Microcontrollers
- Package:
- 24-WFQFN Exposed Pad
- Datasheet:
-
R5F10278ANA#25.pdf
- Description:
- IC MCU 16BIT 8KB FLASH 24HWQFN
- Quantity:
- Payment:
- Shipping:
Inventory:1,363
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Product details
Overview
R5F10278ANA#25 from Renesas Electronics is a 24-pin HWQFN-packaged RL78/G12 16-bit 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. It integrates an 8-channel 10-bit ADC, dual CSI/SPI interfaces, UART, I²C, DMA controller, and ultra-low-power STOP/HALT/SNOOZE modes-designed for battery-powered sensor nodes and industrial control panels.
For engineers reviewing the R5F10278ANA#25 datasheet, R5F10278ANA#25 pinout, R5F10278ANA#25 application, or R5F10278ANA#25 equivalent, key selection criteria include its 2 KB on-chip data flash with 1M rewrite cycles, ±1.0% high-speed on-chip oscillator accuracy (–20 to +85°C), 24-pin HWQFN (4 × 4 mm, 0.5 mm pitch) package, and support for background data flash programming during active code execution.
Technical Context
The R5F10278ANA#25 implements the RL78 CPU core with a 3-stage CISC pipeline, 1 MB address space, and configurable instruction timing (0.04167 µs min @ 24 MHz). Its memory subsystem includes separate code flash (8 KB, 1 KB blocks) and data flash (2 KB, BGO-capable), enabling firmware updates and parameter storage without halting operation.
Peripheral integration centers on low-power operation: dual CSI channels support SPI-like communication with slave select handling; UART0 provides full-duplex serial; the 12-bit interval timer and window watchdog ensure deterministic timing; and the 10-bit ADC supports up to 11 channels with internal 1.45 V reference and temperature sensor-enabling self-calibrating sensing in compact embedded systems.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Core Architecture | RL78 16-bit CISC CPU with 3-stage pipeline, 1 MB address space, 8 register banks |
| Flash Memory | 8 KB code flash (1 KB erase blocks) + 2 KB data flash with background operation (BGO) |
| RAM | 512 B on-chip RAM, sufficient for real-time control stacks and small buffers |
| Operating Voltage | 1.8 V to 5.5 V single supply-supports direct Li-ion, coin-cell, or 3.3/5 V rail interfacing |
| ADC | 10-bit resolution, 11 input channels, internal 1.45 V reference, integrated temperature sensor |
| Oscillator Accuracy | ±1.0% over –20 to +85°C for 1–24 MHz high-speed on-chip oscillator |
| Power Modes | HALT (63 μA/MHz), STOP (0.52 μA typical), SNOOZE (low-latency wake-up with peripheral activity) |
Pinout & Package
Package: HWQFN-24, 4 mm × 4 mm, 0.5 mm pitch, exposed die pad (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 / SPI Clock 0 / I²C Clock 0 | Multi-function pin supporting buzzer tone generation, master SPI clocking, or I²C bus clocking-configurable via PIOR |
| P11/ANI17/SI00/RxD0/SDA00/TOOLRxD | Port 1 bit 1 / Analog Input 17 / SPI Data In 0 / UART Receive / I²C Data / Tool Interface RX | Enables shared use across serial protocols and debug interface-reduces external component count |
| P12/ANI18/SO00/TxD0/TOOLTxD | Port 1 bit 2 / Analog Input 18 / SPI Data Out 0 / UART Transmit / Tool Interface TX | Supports full-duplex UART or SPI slave mode while retaining analog input capability |
| P13/ANI19/TI00/TO00/INTP2 | Port 1 bit 3 / Analog Input 19 / Timer Input 0 / Timer Output 0 / Interrupt 2 | Direct connection to TAU0 channel 0 for PWM capture, pulse width measurement, or edge-triggered interrupt |
| P14/ANI20/TO01/INTP3 | Port 1 bit 4 / Analog Input 20 / Timer Output 1 / Interrupt 3 | Dedicated timer output for driving external logic or generating precise timing signals |
| P20/ANI0/AVREFP | Port 2 bit 0 / Analog Input 0 / ADC Positive Reference | Provides stable positive reference for ADC conversions-critical for precision analog measurements |
| P21/ANI1/AVREFM | Port 2 bit 1 / Analog Input 1 / ADC Negative Reference | Completes differential ADC reference pair; enables ratiometric sensor readings |
| P22/ANI2 | Port 2 bit 2 / Analog Input 2 | General-purpose analog input supporting thermistor, voltage divider, or current-sense amplifier outputs |
| P23/ANI3 | Port 2 bit 3 / Analog Input 3 | Additional analog channel for multi-sensor monitoring or redundant measurement |
| P40/KR0/TOOL0 | Port 4 bit 0 / Key Return 0 / Tool Interface Data | Supports capacitive touch key scanning or in-circuit debugging via dedicated tool interface |
| P41/ANI22/SO01/SDA01/TI02/TO02/INTP1 | Port 4 bit 1 / Analog Input 22 / SPI Data Out 1 / I²C Data 1 / Timer Input 2 / Timer Output 2 / Interrupt 1 | High-density multiplexing enables simultaneous analog sensing, I²C slave comms, and timer-based event capture |
| P42/ANI21/SCK01/SCL01/TI03/TO03 | Port 4 bit 2 / Analog Input 21 / SPI Clock 1 / I²C Clock 1 / Timer Input 3 / Timer Output 3 | Second SPI/I²C interface with timer input/output-ideal for daisy-chained sensors or dual-bus systems |
| P60/KR4/SCLA0/(TxD0) | Port 6 bit 0 / Key Return 4 / I²C Clock A / UART Transmit (remapped) | I²C master clock with optional UART remapping-flexible for board-level signal routing constraints |
| P61/KR5/SDAA0/(RxD0) | Port 6 bit 1 / Key Return 5 / I²C Data A / UART Receive (remapped) | I²C master data line with UART receive remap-supports dual-role I²C master or UART bridge |
| P121/KR3/X1/(TI03)/(INTP3) | Port 12 bit 1 / Key Return 3 / Crystal Oscillator Input / Timer Input 3 (remapped) / Interrupt 3 (remapped) | Primary crystal input for main system clock; also serves as timer input or interrupt source when not used for X1 |
| P122/KR2/X2/EXCLK/(TI02)/(INTP2) | Port 12 bit 2 / Key Return 2 / Crystal Oscillator Output / External Clock Input / Timer Input 2 (remapped) / Interrupt 2 (remapped) | Crystal output or external clock input-enables precise timing synchronization with external sources |
| P125/KR1/SI01/RESET | Port 12 bit 5 / Key Return 1 / SPI Data In 1 / Reset Input | Hardware reset input with SPI data-in function-allows shared trace header footprint for debug and production |
| P137/INTP0 | Port 13 bit 7 / Interrupt 0 | Dedicated external interrupt pin for fast response to critical events (e.g., emergency stop, fault detection) |
| VDD | Power Supply | Single 1.8–5.5 V supply-eliminates need for external regulators in many applications |
| VSS | Ground | Reference ground for all digital and analog circuits; exposed die pad must connect to VSS for thermal and EMI performance |
Key Features
| Feature | Design Value |
|---|---|
| True low-power platform | 63 μA/MHz active current enables >10-year battery life in sensor nodes using intermittent wake-up |
| On-chip data flash with BGO | 2 KB data flash supports background rewrites during program execution-no interruption to real-time tasks |
| Dual CSI/SPI interfaces | Two independent simplified SPI peripherals allow concurrent communication with multiple sensors or displays |
| Integrated safety functions | CRC calculation unit, RAM guard, and SFR guard detect memory corruption and prevent unintended register writes |
| Configurable analog subsystem | 11-channel 10-bit ADC with internal reference and temperature sensor enables self-calibrating measurement systems |
| Flexible clock architecture | High-speed on-chip oscillator (1–24 MHz, ±1.0%) eliminates external crystal cost while maintaining timing accuracy |
Applications
| Smart Home Sensor Hub | Industrial Motor Control Panel |
|---|---|
Use Scenario: Compact wall-mounted environmental monitor aggregating temperature, humidity, and air quality data via I²C and analog sensors. IC Role / Device Role / Timing Role: Central MCU managing sensor polling, local data logging to data flash, and BLE/Wi-Fi module handshaking via UART. Use Value: 2 KB data flash stores calibration coefficients and hourly logs; 63 μA/MHz operation extends CR2032 battery life beyond 3 years. | Use Scenario: DIN-rail mounted HMI panel controlling 3-phase motor speed, monitoring thermal sensors, and reporting faults via Modbus RTU. IC Role / Device Role / Timing Role: Real-time controller executing PID loops, sampling 10-bit ADC channels at 10 kHz, and driving UART-based RS-485 communication. Use Value: Dual CSI interfaces manage isolated encoder feedback and display SPI bus; STOP mode reduces standby power to 0.52 μA during idle periods. |
| Portable Medical Diagnostic Device | Energy Metering Subsystem |
Use Scenario: Handheld blood glucose meter requiring precise analog front-end, button interface, and secure firmware updates. IC Role / Device Role / Timing Role: Signal processor acquiring analog strip readings, validating user inputs via KR pins, and performing encrypted OTA updates. Use Value: On-chip CRC and SFR guard protect against memory corruption during field updates; 1.8 V minimum operation supports single-cell alkaline power. | Use Scenario: Smart electricity meter auxiliary board measuring voltage/current harmonics and communicating via optical port. IC Role / Device Role / Timing Role: Secondary controller sampling 11-channel ADC for harmonic analysis, storing waveform snapshots in data flash, and transmitting via UART to main meter SoC. Use Value: Background data flash writes preserve waveform history during live measurement; ±1.0% oscillator ensures accurate time-stamping of energy events. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microcontroller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| R5F10279ANA#25 | 12 KB code flash, same 2 KB data flash, identical pinout and peripherals | Requires larger firmware image size; suitable for applications needing bootloader + application partitioning | Select when firmware exceeds 8 KB but full 16 KB is unnecessary-avoids over-provisioning memory |
| R5F10277ANA#25 | 4 KB code flash, same 2 KB data flash, identical pinout and peripherals | Limited to smaller firmware footprints; lower cost for simple control tasks | Choose for cost-sensitive designs with minimal feature set-retains all low-power and analog capabilities |
Compared with R5F10279ANA#25 and R5F10277ANA#25, the R5F10278ANA#25 delivers optimal balance: sufficient 8 KB flash for robust firmware with bootloader and safety checks, full 2 KB data flash for field calibration storage, and identical low-power/peripheral features-making it the default choice for mid-complexity industrial and medical devices.
Availability
R5F10278ANA#25 is available at Aetrix Electronics and suitable for smart home sensor hubs, industrial motor control panels, and portable medical diagnostic devices requiring stable component supply, long-term lifecycle support, and guaranteed traceability.
Supply support for R5F10278ANA#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 ultra-low-power 16-bit MCUs optimized for cost-sensitive, battery-operated, and industrial control applications-emphasizing energy efficiency, integrated analog, and functional safety features.
FAQ
What is the maximum operating frequency and corresponding DMIPS rating for the R5F10278ANA#25?
The R5F10278ANA#25 operates at up to 24 MHz using its high-speed on-chip oscillator, delivering 31 DMIPS performance. This benchmark reflects integer instruction throughput under standard conditions and enables real-time control loops, sensor fusion, and lightweight protocol stacks without external acceleration.
Does the R5F10278ANA#25 support background data flash programming while executing application code?
Yes, the R5F10278ANA#25 supports background operation (BGO) for its 2 KB data flash memory. Instructions can be executed from program memory while rewriting data flash-enabling seamless firmware parameter updates, calibration storage, or event logging without interrupting real-time tasks.
What are the key differences between the R5F10278ANA#25 and the R5F10378ANA#25?
The R5F10278ANA#25 includes 2 KB data flash, ±1.0% oscillator accuracy, dual CSI/SPI, dual simplified I²C, DMA controller, and safety features (CRC, RAM/SFR guard); the R5F10378ANA#25 omits data flash, has ±5.0% oscillator accuracy, only one CSI/SPI, no I²C, no DMA, and lacks safety functions-making R5F10278ANA#25 superior for reliable, feature-rich embedded control.
Which package type and pin count does the R5F10278ANA#25 use, and what are its thermal considerations?
The R5F10278ANA#25 uses a 24-pin HWQFN package (4 mm × 4 mm, 0.5 mm pitch) with an exposed die pad. The pad must be soldered to a VSS-connected copper area for effective thermal dissipation and EMI suppression-ensuring stable operation under continuous 24 MHz operation at 85°C ambient.
Can the R5F10278ANA#25 operate from a single 1.8 V supply, and what analog features remain functional at that voltage?
Yes, the R5F10278ANA#25 operates across 1.8–5.5 V. At 1.8 V, its 10-bit ADC maintains full 11-channel operation with internal 1.45 V reference, temperature sensor functionality, and ±1.0% high-speed oscillator accuracy-enabling precision sensing in ultra-low-voltage battery systems.
R5F10278ANA#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 ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
R5F10278ANA#25 FAQ
1.How can I place an order for R5F10278ANA#25 through Aetrix?
Please submit a Request for Quotation (RFQ) for R5F10278ANA#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 R5F10278ANA#25 reliable?
The price and inventory of R5F10278ANA#25 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for R5F10278ANA#25 is usually 5 days.
3.What payment methods are accepted for R5F10278ANA#25?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for R5F10278ANA#25 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for R5F10278ANA#25?
R5F10278ANA#25 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your R5F10278ANA#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 R5F10278ANA#25?
For technical support, including R5F10278ANA#25 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your R5F10278ANA#25 requirements.
6.How does Aetrix verify that R5F10278ANA#25 is sourced from the original manufacturer or authorized distributors?
All R5F10278ANA#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 R5F10278ANA#25 meets industry standards.
7.What is the process for return or replacement of R5F10278ANA#25?
All R5F10278ANA#25 units undergo pre-shipment inspection (PSI). If there is an issue with R5F10278ANA#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 R5F10278ANA#25 part is unused and in its original packaging.
Return procedure for R5F10278ANA#25:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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