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Renesas R5F21275SNFP#V2
- Part No.:
- R5F21275SNFP#V2
- Manufacturer:
- Renesas
- Category:
- Microcontrollers
- Package:
- 32-LQFP
- Datasheet:
-
R5F21275SNFP#V2.pdf
- Description:
- IC MCU 16BIT 24KB FLASH 32LQFP
- Quantity:
- Payment:
- Shipping:
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Product details
Overview
R5F21275SNFP#V2 from Renesas Electronics is a 16-bit single-chip microcontroller in the R8C/27 Group, featuring an R8C CPU core, 24 KB on-chip flash program memory, 1.5 KB RAM, and dual 1 KB data flash blocks. It operates at up to 20 MHz (50 ns min instruction time), supports 12-channel 10-bit A/D conversion, hardware LIN bus via UART0+TimerRA, and runs from 2.2–5.5 V across –20°C to +85°C ambient. It targets embedded control in consumer appliance motor drives and sensor interface modules.
For engineers reviewing the R5F21275SNFP#V2 datasheet, R5F21275SNFP#V2 pinout, R5F21275SNFP#V2 application, or R5F21275SNFP#V2 equivalent, key selection criteria include its 32-pin LQFP package, integrated data flash for parameter storage, real-time clock capability (N/D versions), low-power stop mode (0.7 µA), and hardware LIN compliance - all confirmed for this exact part number in Renesas REJ03B0168-0210 Rev.2.10.
Technical Context
The R5F21275SNFP#V2 implements the R8C CPU core with 89 fundamental instructions and 1 Mbyte unified address space. Its memory subsystem includes 24 KB flash ROM (1,000 erase/write cycles) and two independent 1 KB data flash blocks (10,000 cycles), enabling field-updatable configuration storage without erasing application code.
Peripheral integration includes UART0/UART1, I²C bus interface, clock-synchronous serial I/O with chip select, 8-bit Timer RA/RB, 16-bit Timer RC with input capture/output compare, Timer RE with real-time clock and compare match (N/D versions), 15-source interrupt controller with 7 priority levels, and on-chip oscillators (high-speed adjustable, low-speed, and 32 kHz XCIN/XCOUT).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| CPU Core | R8C 16-bit CISC core with 89 instructions and 20-bit PC; enables compact firmware and deterministic timing for real-time control loops. |
| Memory | 24 KB flash program ROM + 1.5 KB RAM + dual 1 KB data flash; allows separate storage of calibration data and firmware without shared erase constraints. |
| Operating Voltage | 2.2–5.5 V (N version); supports direct interface with 3.3 V and 5 V logic domains and battery-backed operation down to 2.2 V. |
| A/D Converter | 10-bit resolution, 12 input channels; provides sufficient dynamic range for analog sensor interfacing (e.g., thermistors, potentiometers) in appliance HMI and motor feedback. |
| Timers | Timer RA/RB (8-bit ×2), Timer RC (16-bit), Timer RE (RTC + compare match); enables PWM generation, pulse-width measurement, and accurate timekeeping in sleep modes. |
| Low-Power Modes | Stop mode current ≤0.7 µA @ 3.0 V; extends battery life in always-on monitoring applications such as smart thermostat wake-on-event functions. |
| Package | 32-pin LQFP (PLQP0032GB-A); standard surface-mount footprint compatible with automated assembly and thermal management in compact enclosures. |
Pinout & Package
32-pin molded-plastic LQFP (PLQP0032GB-A), 7 mm × 7 mm, 0.8 mm pitch, exposed pad not specified. Pin 1 marked by dot or notch; top-view orientation per Figure 1.4 in REJ03B0168-0210.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VCC / VSS | Power supply / ground | Primary digital power domain (2.2–5.5 V); VSS also serves as analog ground (AVSS) reference for A/D converter. |
| AVCC / AVSS | Analog power / ground | Dedicated analog supply pins; require local decoupling capacitor to maintain A/D accuracy and noise immunity. |
| XIN / XOUT | Crystal oscillator input/output | Supports external 1–20 MHz crystal or ceramic resonator; enables precise system clocking for UART baud rate accuracy and timer stability. |
| RESET | Active-low reset input | Asynchronous reset assertion forces CPU restart and register initialization; internal POR circuit ensures reliable boot at power-up. |
| P0_0–P0_7 | General-purpose I/O port | 8-bit bidirectional CMOS port with individual direction control; P0_0–P0_7 serve as A/D inputs AN7–AN0 respectively. |
| AN0–AN11 | Analog input channels | 12 dedicated analog inputs mapped across P0, P1, and P3 ports; share pins with digital I/O but require analog input mode configuration. |
| TXD0 / RXD0 | UART0 transmit/receive | Full-duplex asynchronous serial interface; supports bootloader programming, debug logging, and host MCU communication at configurable baud rates. |
| SCL / SDA | I²C bus interface | Open-drain bidirectional signals compliant with Philips I²C specification; enable connection to EEPROMs, sensors, and display controllers with minimal external components. |
Key Features
| Feature | Design Value |
|---|---|
| Dual 1 KB data flash blocks | Enables nonvolatile storage of user parameters, calibration coefficients, or device IDs with 10,000-cycle endurance - independent of main program flash. |
| Hardware LIN module | Integrated LIN 2.0/2.1 support via UART0 + TimerRA; eliminates need for external transceiver in automotive body electronics and appliance sub-networks. |
| Real-time clock (RTC) | Timer RE provides calendar-time tracking in wait mode using 32 kHz XCIN clock source; maintains time during low-power operation without external RTC IC. |
| 12-channel 10-bit A/D converter | Simultaneous sampling not supported, but channel scanning enables multi-sensor acquisition (e.g., temperature, voltage, current) within single firmware loop. |
| 7-level interrupt priority | Allows deterministic response to time-critical events (e.g., motor overcurrent fault) while servicing lower-priority tasks like UI updates or communication polling. |
Applications
| Home Appliance Motor Control | Industrial Sensor Node |
|---|---|
|
Use Scenario: Variable-speed control of BLDC motors in washing machines and air conditioners using sensorless commutation. IC Role / Device Role / Timing Role: Main system controller executing FOC algorithms, managing PWM outputs, reading hall-effect or back-EMF signals, and handling user interface. Use Value: Integrated 10-bit A/D and 16-bit Timer RC enable precise current sensing and phase timing; data flash stores motor profile parameters across power cycles. |
Use Scenario: Battery-powered environmental monitor collecting temperature, humidity, and CO₂ data for wireless transmission. IC Role / Device Role / Timing Role: Data acquisition and preprocessing unit that samples sensors, applies linearization, and triggers RF transmission on threshold breach. Use Value: 0.7 µA stop mode and RTC allow scheduled wake-ups every 10 minutes; dual data flash retains calibration offsets and event logs without volatile RAM backup. |
| Automotive Body Controller | Smart Thermostat Interface |
|
Use Scenario: Door module controlling window lift, mirror adjustment, and interior lighting with LIN bus communication to central ECU. IC Role / Device Role / Timing Role: LIN slave node managing local actuator drivers, switch inputs, and diagnostic reporting via hardware LIN peripheral. Use Value: Hardware LIN reduces CPU load and ensures protocol compliance; 24 KB flash accommodates bootloader, application, and diagnostic firmware partitions. |
Use Scenario: Residential HVAC controller with touch panel, ambient sensor fusion, and Wi-Fi connectivity managed by companion SoC. IC Role / Device Role / Timing Role: Dedicated sensor hub aggregating thermistor, NTC, and humidity readings while maintaining real-time clock and local alarm timing. Use Value: XCIN-based RTC maintains accurate time during AC power loss; 12 A/D channels support multi-zone sensing without external multiplexer. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar 16-bit microcontroller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| R5F21274SNFP | 16 KB program flash, same 1.5 KB RAM and dual 1 KB data flash; identical peripheral set and package. | Lower code density margin; suitable where firmware size remains under 16 KB and cost optimization is prioritized. | Select when application firmware fits within 16 KB and BOM cost reduction is critical; no PCB or software changes required. |
| R5F21275SDFP | Same memory and peripherals, but rated for –40°C to +85°C industrial temperature range (D version vs. N version). | Required for outdoor or uncontrolled-ambient deployments where extended temperature tolerance is mandatory. | Choose for industrial or automotive cabin applications requiring wider operating temperature; pinout and firmware binary compatible. |
Compared with R5F21275SNFP#V2, R5F21274SNFP offers reduced program memory at lower cost for simpler firmware, while R5F21275SDFP delivers extended temperature operation without altering functionality or layout - both retain identical data flash architecture and LIN capability.
Availability
R5F21275SNFP#V2 is available at Aetrix Electronics and suitable for home appliance motor control, industrial sensor nodes, automotive body electronics, and smart HVAC interfaces requiring stable component supply and long-term production continuity.
Supply support for R5F21275SNFP#V2 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 R8C/27 Group, including R5F21275SNFP#V2, was designed for cost-sensitive, low-power embedded control applications requiring integrated data flash, LIN support, and robust analog peripherals in compact 32-pin packages.
FAQ
What is the maximum operating frequency and corresponding supply voltage range for R5F21275SNFP#V2?
R5F21275SNFP#V2 achieves a minimum instruction execution time of 50 ns at 20 MHz, requiring VCC = 3.0–5.5 V. At lower frequencies (e.g., 10 MHz), it supports down to 2.7 V, and at 5 MHz, operation is guaranteed from 2.2 V - all within its N-version ambient temperature range of –20°C to +85°C.
Does R5F21275SNFP#V2 include hardware support for LIN communication?
Yes, R5F21275SNFP#V2 integrates a hardware LIN module using UART0 and Timer RA per Renesas REJ03B0168-0210. This enables full LIN 2.0/2.1 slave functionality including sync-break detection, identifier filtering, and checksum calculation without CPU intervention.
How many A/D input channels does R5F21275SNFP#V2 support, and what is their resolution?
R5F21275SNFP#V2 includes a single 10-bit successive-approximation A/D converter with 12 analog input channels (AN0–AN11), mapped across P0, P1, and P3 ports. Each channel supports programmable sampling time and conversion trigger sources including software, timer, and external interrupts.
What type and capacity of on-chip flash memory does R5F21275SNFP#V2 provide?
R5F21275SNFP#V2 contains 24 KB of on-chip flash program memory (rated for 1,000 erase/write cycles) and two independent 1 KB data flash blocks (rated for 10,000 cycles). The data flash blocks support byte-level writes and are electrically isolated from program flash for concurrent operation.
Is R5F21275SNFP#V2 compatible with the R8C/26 Group pinout and software ecosystem?
Yes, R5F21275SNFP#V2 shares identical pinout, peripheral register map, and instruction set with R8C/26 Group devices in the same package. Software developed for R5F21265SNFP can be reused with only linker script and flash configuration adjustments to accommodate the additional data flash blocks.
R5F21275SNFP#V2 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Renesas
- Package/Case:
- 32-LQFP
- Series:
- R8C/2x/27
- Packaging:
- Tray
- Product Status:
- Active
- Programmable:
- Not Verified
- Core Processor:
- R8C
- Core Size:
- 16-Bit
- Speed:
- 20MHz
- Connectivity:
- I2C, LINbus, SIO, SSU, UART/USART
- Peripherals:
- LED, POR, Voltage Detect, WDT
- Number of I/O:
- 25
- Program Memory Size:
- 24KB (24K x 8)
- Program Memory Type:
- FLASH
- EEPROM Size:
- 2K x 8
- RAM Size:
- 1.5K x 8
- Voltage - Supply (Vcc/Vdd):
- 2.2V ~ 5.5V
- Data Converters:
- A/D 12x10b
- Oscillator Type:
- Internal
- Operating Temperature:
- -20°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
R5F21275SNFP#V2 FAQ
1.How can I place an order for R5F21275SNFP#V2 through Aetrix?
Please submit a Request for Quotation (RFQ) for R5F21275SNFP#V2 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 R5F21275SNFP#V2 reliable?
The price and inventory of R5F21275SNFP#V2 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for R5F21275SNFP#V2 is usually 5 days.
3.What payment methods are accepted for R5F21275SNFP#V2?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for R5F21275SNFP#V2 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for R5F21275SNFP#V2?
R5F21275SNFP#V2 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your R5F21275SNFP#V2 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 R5F21275SNFP#V2?
For technical support, including R5F21275SNFP#V2 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your R5F21275SNFP#V2 requirements.
6.How does Aetrix verify that R5F21275SNFP#V2 is sourced from the original manufacturer or authorized distributors?
All R5F21275SNFP#V2 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 R5F21275SNFP#V2 meets industry standards.
7.What is the process for return or replacement of R5F21275SNFP#V2?
All R5F21275SNFP#V2 units undergo pre-shipment inspection (PSI). If there is an issue with R5F21275SNFP#V2, 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 R5F21275SNFP#V2 part is unused and in its original packaging.
Return procedure for R5F21275SNFP#V2:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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