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Renesas R5F21266SNFP#X6
- Part No.:
- R5F21266SNFP#X6
- Manufacturer:
- Renesas
- Category:
- Microcontrollers
- Package:
- 32-LQFP
- Datasheet:
-
R5F21266SNFP#X6.pdf
- Description:
- IC MCU 16BIT 32KB FLASH 32LQFP
- Quantity:
- Payment:
- Shipping:
Inventory:1,582
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Product details
Overview
R5F21266SNFP#X6 from Renesas Electronics is a 16-bit R8C/26 Group single-chip microcontroller with 32 KB flash ROM, 1.5 KB RAM, 12-channel 10-bit A/D converter, UART0/UART1 serial interfaces, and hardware LIN module - used in embedded control of office equipment and consumer appliances operating at -20 to +85°C.
For engineers reviewing the R5F21266SNFP#X6 datasheet, R5F21266SNFP#X6 pinout, R5F21266SNFP#X6 application, or R5F21266SNFP#X6 equivalent, this page delivers verified specifications, validated 32-pin LQFP package mapping, confirmed peripheral functions (Timer RA/RB/RC/RE, I²C, SSI), and real-world use context for industrial and consumer design validation.
Technical Context
The R5F21266SNFP#X6 implements the R8C CPU core with 89 fundamental instructions and executes at 50 ns minimum instruction time (20 MHz XIN, 3.0–5.5 V). It integrates three clock generation circuits: XIN oscillator (external crystal/resonator), high-speed on-chip oscillator (adjustable), and XCIN 32 kHz circuit (N/D version only).
Peripheral subsystems include two UART channels supporting LIN physical layer via Timer RA and UART0, an I²C bus interface, clock-synchronous serial I/O with chip select (SSI/SCS/SSCK/SSO), and a 15-bit watchdog timer with start-on-reset selection - all mapped to a fixed 32-pin LQFP (PLQP0032GB-A) footprint with dedicated analog supply pins (AVCC/AVSS) and reference input (VREF).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| CPU Core | R8C 16-bit architecture with 89 instructions and 1 Mbyte address space |
| Memory | 32 KB on-chip flash ROM + 1.5 KB RAM - sufficient for standalone appliance control firmware without external memory |
| A/D Converter | 10-bit resolution, 12 input channels (AN0–AN11) - supports multi-sensor analog monitoring in HVAC or motor control |
| Timers | Timer RA/RB (8-bit × 2), Timer RC (16-bit), Timer RE (real-time clock + compare match) - enables PWM generation, input capture, and time-stamped event logging |
| Serial Interfaces | UART0/UART1 (LIN-capable), I²C bus, and clock-synchronous serial I/O with chip select - provides flexible communication for sensor networks and display modules |
| Operating Range | -20°C to +85°C ambient temperature, 3.0–5.5 V supply - qualified for standard consumer and office equipment environments |
| Package | 32-pin LQFP (PLQP0032GB-A), 7 × 7 mm body, 0.8 mm pitch - compatible with automated SMT assembly and thermal management in compact enclosures |
Pinout & Package
Package: 32-pin molded-plastic LQFP (PLQP0032GB-A), 7 mm × 7 mm, 0.8 mm lead pitch, exposed pad not specified.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VCC / VSS | Power supply input | Digital core supply (2.2–5.5 V) and ground - requires local decoupling per layout guidelines |
| AVCC / AVSS | Analog power supply | Dedicated analog domain supply - must be filtered separately from digital VCC to maintain A/D accuracy |
| RESET | Reset input | Active-low asynchronous reset - pulled high externally to ensure reliable startup |
| XIN / XOUT | External clock input/output | Supports ceramic resonator or crystal up to 20 MHz - defines system timing base for all peripherals |
| AN0–AN11 | Analog inputs | 12 single-ended channels for 10-bit A/D conversion - share pins with port P0/P1/P3, configurable via register |
| TXD0 / RXD0 | UART0 data output/input | Full-duplex asynchronous serial interface - used for host MCU communication or debug console |
| P0_0–P0_7 | General-purpose I/O port | 8-bit CMOS bidirectional port with individual direction control - supports pull-up enable for key scan or switch sensing |
| TREO | Timer RE output | Real-time clock output signal - usable as wake-up source or timebase for low-power scheduling |
Key Features
| Feature | Design Value |
|---|---|
| Hardware LIN Module | Integrated LIN 2.0 physical layer using Timer RA and UART0 - eliminates external transceiver for automotive body electronics cost reduction |
| Low-Power Modes | Wait mode (2.0 µA @ 3.0 V, 32 kHz XCIN) and stop mode (0.7 µA) - extends battery life in portable or energy-conscious appliances |
| On-Chip Oscillators | High-speed (adjustable) and low-speed on-chip oscillators - enables clock source redundancy and fast wake-up without external components |
| Interrupt Architecture | 7 priority levels, 15 internal + 4 external + 4 software interrupt sources - supports deterministic real-time response in multi-tasking firmware |
| LED Drive Capability | 8 I/O pins (P1_0–P1_7) support LED sink/source drive in N/D versions - simplifies front-panel indicator design without external drivers |
Applications
| Office Equipment Control | Consumer Appliance Interface |
|---|---|
Use Scenario: Embedded controller in multifunction printers managing paper feed, toner sensing, and panel display. IC Role / Device Role / Timing Role: Main system MCU executing real-time motor control, A/D-based sensor reading, and UART-based host communication. Use Value: Integrated 12-channel A/D and dual UART reduce BOM count; LIN capability supports future service port expansion. |
Use Scenario: User interface and motor control unit in microwave ovens with keypad, display, and turntable driver. IC Role / Device Role / Timing Role: Central control IC handling key scan, LED indicators, relay timing, and thermal cutoff monitoring. Use Value: On-chip LED drive ports (P1_0–P1_7) eliminate discrete drivers; 32 KB flash accommodates feature-rich UI firmware. |
| Industrial Panel Meters | Home Audio System Controller |
Use Scenario: Digital panel meter measuring voltage/current with RS-232 output and front-panel buttons. IC Role / Device Role / Timing Role: Signal acquisition MCU performing 10-bit A/D conversion, UART transmission, and button debounce logic. Use Value: Dedicated AVCC/AVSS and VREF pins ensure stable analog measurement; 1.5 KB RAM supports floating-point math buffers. |
Use Scenario: Feature controller in compact stereo receivers managing IR remote decoding, volume control, and display updates. IC Role / Device Role / Timing Role: Peripheral coordinator interfacing IR receiver, rotary encoder, I²C EEPROM, and 7-segment display. Use Value: I²C interface enables direct connection to configuration memory; 89-instruction set ensures efficient C compiler code density. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar 16-bit microcontroller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| R5F21266SDFP | Same 32 KB ROM/1.5 KB RAM, but rated for -40°C to +85°C operation and includes XCIN/XCOUT 32 kHz oscillator circuit | Required for industrial environments with extended temperature range or RTC-dependent sleep/wake cycles | Select when operating below -20°C or requiring autonomous real-time clock functionality without external 32 kHz crystal |
| R5F21276SNFP | Identical package and pinout, but adds 2 × 1 KB data flash blocks (10,000 write/erase cycles) and increases program ROM endurance to 1,000 cycles | Suitable for field-upgradable firmware or parameter storage needing frequent non-volatile writes | Choose when runtime data logging, calibration storage, or over-the-air update capability is required - not drop-in replaceable due to data flash initialization differences |
Compared with R5F21266SNFP#X6, R5F21266SDFP extends temperature range and adds 32 kHz RTC support, while R5F21276SNFP introduces data flash for persistent configuration - both require firmware adaptation but share identical I/O mapping and instruction set compatibility.
Availability
R5F21266SNFP#X6 is available at Aetrix Electronics and suitable for office equipment control, consumer appliance interface, and industrial panel meter applications requiring stable component supply across long production lifecycles.
Supply support for R5F21266SNFP#X6 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, power, and SoC solutions for industrial, automotive, and consumer markets.
The R8C/26 Group, including R5F21266SNFP#X6, was designed for cost-sensitive, low-to-mid complexity embedded control in office automation and home electronics - emphasizing integration, low power, and ease of certification.
FAQ
What is the maximum operating frequency supported by R5F21266SNFP#X6?
R5F21266SNFP#X6 supports a maximum external clock frequency of 20 MHz via the XIN/XOUT pins, achieving a 50 ns minimum instruction execution time at 3.0–5.5 V supply. The on-chip high-speed oscillator is adjustable but does not exceed this frequency limit. Internal timing paths are fully characterized for 20 MHz operation across the full -20°C to +85°C range.
Does R5F21266SNFP#X6 include a real-time clock (RTC) function?
R5F21266SNFP#X6 includes Timer RE with real-time clock capability, but only in N and D versions - confirmed by its part number suffix 'N' and documentation stating XCIN/XCOUT (32 kHz) support is enabled for N/D versions. The RTC operates using the 32 kHz sub-clock input and supports compare-match interrupts for periodic wake-up events.
Can R5F21266SNFP#X6 directly drive LEDs without external components?
Yes - R5F21266SNFP#X6 supports LED drive on P1_0 through P1_7 (8 pins), as specified for N and D versions. Each pin can sink or source sufficient current for standard indicator LEDs, eliminating the need for external transistor drivers in basic status display applications.
What serial communication interfaces are integrated into R5F21266SNFP#X6?
R5F21266SNFP#X6 integrates UART0 and UART1 (both supporting LIN 2.0 physical layer), an I²C bus interface, and a clock-synchronous serial I/O with chip select (SSI/SCS/SSCK/SSO). These provide concurrent support for debug consoles, sensor networks, EEPROMs, and display controllers without external bridge ICs.
Is R5F21266SNFP#X6 pin-compatible with other R8C/26 Group MCUs?
Yes - all R8C/26 Group MCUs, including R5F21262SNFP, R5F21264SNFP, R5F21265SNFP, and R5F21266SNFP, share identical 32-pin LQFP (PLQP0032GB-A) packaging and pin assignments. Firmware and hardware designs are interchangeable across ROM size variants, enabling scalable product families with minimal PCB changes.
R5F21266SNFP#X6 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Renesas
- Package/Case:
- 32-LQFP
- Series:
- R8C/2x/26
- Packaging:
- Tape & Reel (TR)
- 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:
- 32KB (32K x 8)
- Program Memory Type:
- FLASH
- EEPROM Size:
- -
- 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:
R5F21266SNFP#X6 FAQ
1.How can I place an order for R5F21266SNFP#X6 through Aetrix?
Please submit a Request for Quotation (RFQ) for R5F21266SNFP#X6 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 R5F21266SNFP#X6 reliable?
The price and inventory of R5F21266SNFP#X6 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for R5F21266SNFP#X6 is usually 5 days.
3.What payment methods are accepted for R5F21266SNFP#X6?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for R5F21266SNFP#X6 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for R5F21266SNFP#X6?
R5F21266SNFP#X6 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your R5F21266SNFP#X6 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 R5F21266SNFP#X6?
For technical support, including R5F21266SNFP#X6 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your R5F21266SNFP#X6 requirements.
6.How does Aetrix verify that R5F21266SNFP#X6 is sourced from the original manufacturer or authorized distributors?
All R5F21266SNFP#X6 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 R5F21266SNFP#X6 meets industry standards.
7.What is the process for return or replacement of R5F21266SNFP#X6?
All R5F21266SNFP#X6 units undergo pre-shipment inspection (PSI). If there is an issue with R5F21266SNFP#X6, 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 R5F21266SNFP#X6 part is unused and in its original packaging.
Return procedure for R5F21266SNFP#X6:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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