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Renesas R5F3651ENFC#U0
- Part No.:
- R5F3651ENFC#U0
- Manufacturer:
- Renesas
- Category:
- Microcontrollers
- Package:
- 128-LQFP
- Datasheet:
-
R5F3651ENFC#U0.pdf
- Description:
- M16C65 256+24KB 2.7/5.5V -20~85C
- Quantity:
- Payment:
- Shipping:
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Product details
Overview
R5F3651ENFC#U0 from Renesas Electronics is a 16-bit M16C/65 microcontroller featuring 512 KB Flash ROM, 32 KB RAM, and integrated peripherals including 10-bit ADC (26 channels), UART (7 channels), and intelligent I/O timers for motor control. It operates at up to 50 MHz with 3.0–5.5 V supply and supports industrial temperature range (−40°C to +85°C) in a 100-pin LQFP package. It is used in motor drive systems requiring real-time PWM, encoder interface, and serial communication.
For engineers reviewing the R5F3651ENFC#U0 datasheet, R5F3651ENFC#U0 pinout, R5F3651ENFC#U0 application, or R5F3651ENFC#U0 equivalent, key selection criteria include its 50 MHz M16C/65 core execution speed, 24-channel intelligent I/O timer capability, 7 UART interfaces with multi-master I²C support, and 5V-tolerant CMOS I/O ports - all critical for embedded motion control and industrial automation designs.
Technical Context
The R5F3651ENFC#U0 implements the M16C/65 CPU core with 108 basic instructions and 20 ns minimum instruction execution time at 50 MHz. Its clock system includes four independent sources: main clock, PLL, subclock, and on-chip oscillator, with oscillation stop detection and low-speed RTC support (125 kHz).
Peripheral integration centers on intelligent I/O modules enabling simultaneous input capture, output compare, PWM generation (24 channels), and 2-phase encoder input - all synchronized to TimerA/B and supported by DMACII for autonomous data transfer without CPU intervention during high-speed motor control loops.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| CPU Core | M16C/65 - 16-bit CISC architecture optimized for deterministic real-time control with 108-instruction set and 20 ns min. execution at 50 MHz |
| Memory | 512 KB Flash ROM + 8 KB Data Flash (10k program/erase cycles) and 32 KB RAM - enables field-upgradable firmware and parameter storage |
| ADC | 10-bit × 26 channels with sample-and-hold - supports simultaneous sampling across multiple motor current/voltage sensors |
| Timers | 24-channel intelligent I/O timer (PWM, input capture, event counter) + 11-channel TimerA/B - provides hardware-accelerated motor commutation timing |
| Serial Interfaces | 7 UART channels + multi-master I²C - enables daisy-chained sensor networks and host MCU communication in distributed drives |
| I/O Ports | 84 CMOS I/O pins with 5V tolerance - allows direct interfacing with legacy 5V logic and industrial sensors without level shifters |
| Operating Range | −40°C to +85°C at 3.0–5.5 V supply - certified for use in harsh industrial environments including factory automation and HVAC systems |
Pinout & Package
Package: PLQP0100KB-A - 100-pin plastic quad flat package (LQFP), 14 mm × 14 mm, 0.5 mm pitch, exposed thermal pad, RoHS-compliant.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| P00–P07 | Port 0 bidirectional I/O | General-purpose CMOS I/O with 5V tolerance; configurable as UART0 TX/RX, TimerA inputs, or ADC triggers |
| P10–P17 | Port 1 bidirectional I/O | Supports intelligent I/O functions: PWM output (P10–P13), encoder A/B inputs (P14–P15), and UART1 TX/RX (P16–P17) |
| P20–P27 | Port 2 bidirectional I/O | Includes TimerB outputs (P20–P23), UART2 TX/RX (P24–P25), and ADC analog inputs (P26–P27) |
| P30–P37 | Port 3 bidirectional I/O | Dedicated to I²C bus (P30–P31), UART3–UART6 signals, and additional PWM/encoder channels |
| VDD, VSS | Power supply pins | VDD (pins 14, 43, 72, 100): 3.0–5.5 V main supply; VSS (pins 13, 42, 71, 99): ground reference with separate analog/digital return paths |
| CLK, XIN/XOUT | External clock input | Accepts 1–20 MHz crystal or external clock source; internal PLL generates 50 MHz system clock |
Key Features
| Feature | Design Value |
|---|---|
| DMACII with startup-from-interrupt | Enables peripheral-initiated data transfers (e.g., ADC→RAM, UART→buffer) without CPU involvement, reducing interrupt latency in real-time control |
| Intelligent I/O timer with dead-time insertion | Hardware-generated complementary PWM with programmable dead time prevents shoot-through in 3-phase inverter gate drivers |
| Multi-master I²C interface | Allows R5F3651ENFC#U0 to act as controller or slave on shared I²C bus - essential for modular sensor/actuator subsystems |
| On-chip voltage detection (LVD) | Monitors VDD and triggers reset or interrupt if supply drops below 2.7 V or 4.2 V - ensures safe shutdown during brownout conditions |
| Subclock RTC with 125 kHz oscillator | Provides battery-backed real-time clock functionality independent of main system clock - supports energy-efficient sleep/wake scheduling |
Applications
| Industrial Motor Drive | Factory Automation Controller |
|---|---|
|
Use Scenario: Closed-loop control of 3-phase BLDC motors in CNC spindles and conveyor systems. IC Role / Device Role / Timing Role: Primary motion controller executing FOC algorithms, generating synchronized 6-channel PWM with dead-time, and reading encoder feedback via 2-phase input. Use Value: Integrated intelligent I/O timers eliminate external gate driver logic and reduce BOM count while maintaining <1 µs PWM edge jitter for precise torque regulation. |
Use Scenario: Standalone PLC module managing I/O expansion, HMI communication, and safety interlocks in packaging machinery. IC Role / Device Role / Timing Role: Central processing unit handling ladder logic execution, serial protocol bridging (Modbus RTU over UART), and real-time I/O scanning at 1 ms intervals. Use Value: 84 5V-tolerant I/O pins enable direct connection to industrial sensors/actuators; multi-master I²C supports hot-pluggable I/O modules without bus arbitration conflicts. |
| HVAC Blower System | Medical Infusion Pump |
|
Use Scenario: Variable-speed centrifugal blower control in commercial HVAC units with airflow feedback and thermal protection. IC Role / Device Role / Timing Role: Real-time motor speed regulator using ADC-sampled current/voltage, PWM-modulated gate drivers, and UART-based communication with building management system. Use Value: On-chip 10-bit ADC with 26 channels allows simultaneous sampling of phase currents, DC-link voltage, and NTC thermistors - eliminating external signal conditioning ICs. |
Use Scenario: Precision fluid delivery control in portable infusion pumps requiring fail-safe operation and battery longevity. IC Role / Device Role / Timing Role: Safety-critical controller performing motor step sequencing, occlusion detection via current monitoring, and battery voltage supervision with LVD-triggered low-power mode. Use Value: Subclock RTC and POR/LVD circuitry ensure deterministic power-on behavior and graceful shutdown during battery depletion - meeting IEC 62304 Class B requirements. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar 16-bit motor control microcontroller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| R5F64165DFB | Same R32C/100 core, 384 KB Flash, 40 KB RAM, identical 100-pin LQFP package and peripheral set - differs only in Flash size and data flash allocation (8 KB vs. 8 KB) | Functionally interchangeable in motor control designs where 512 KB Flash is not required; same pinout and register mapping | Select R5F64165DFB when firmware footprint fits within 384 KB and cost optimization is prioritized without sacrificing performance or features |
| R5F64175DFB | Same R32C/100 core, 384 KB Flash, 40 KB RAM, identical peripheral complement and 100-pin LQFP package - differs in group-level security configuration and default reset vector | Valid drop-in replacement for R5F3651ENFC#U0 in industrial drives where ROM code protect function is sufficient and no custom bootloader is deployed | Choose R5F64175DFB for new designs targeting simplified certification paths where identical timing, I/O, and analog performance are retained |
Compared with R5F3651ENFC#U0, R5F64165DFB offers identical real-time control capability at lower Flash density, while R5F64175DFB delivers matching peripheral timing and I/O behavior with minor boot configuration differences - both preserve the 50 MHz operation, 24-channel intelligent I/O, and 7 UART interfaces critical for motion control.
Availability
R5F3651ENFC#U0 is available at Aetrix Electronics and suitable for industrial motor drives, factory automation controllers, and HVAC blower systems requiring stable component supply across extended production lifecycles.
Supply support for R5F3651ENFC#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 specializing in microcontrollers, analog, and power management solutions for automotive, industrial, and IoT markets.
The R5F3651ENFC#U0 belongs to the M16C/65 microcontroller family, designed specifically for cost-sensitive, high-reliability embedded control applications demanding deterministic real-time response, integrated motor control peripherals, and industrial-grade environmental robustness.
FAQ
What is the maximum operating frequency and supply voltage range for the R5F3651ENFC#U0?
The R5F3651ENFC#U0 operates at a maximum frequency of 50 MHz with a supply voltage range of 3.0 V to 5.5 V. Its internal PLL generates the system clock from an external crystal or oscillator input, and the device maintains full functionality across the entire voltage range, including accurate ADC conversion and stable UART communication at both extremes.
Does the R5F3651ENFC#U0 support hardware-based PWM dead-time insertion for inverter control?
Yes, the R5F3651ENFC#U0 integrates intelligent I/O timers that provide hardware-configurable dead-time insertion between complementary PWM outputs. This feature is directly mapped to TimerA and TimerB resources and is used in 3-phase inverter applications to prevent shoot-through in gate driver stages without software overhead or timing jitter.
How many UART interfaces does the R5F3651ENFC#U0 include, and do they support automatic baud rate detection?
The R5F3651ENFC#U0 includes seven UART channels. While it does not implement automatic baud rate detection, each UART supports programmable baud rate generation via dedicated divisor registers and fractional dividers, enabling precise timing accuracy across standard rates (e.g., 9600, 115200, 921600 bps) with minimal error margin.
Is the R5F3651ENFC#U0 pin-compatible with other members of the M16C/65 family such as R5F3651EDFC#U0?
Yes, the R5F3651ENFC#U0 shares the same PLQP0100KB-A 100-pin LQFP package and identical pin mapping with R5F3651EDFC#U0. Both devices have identical power, clock, reset, and I/O pin assignments, allowing direct PCB reuse when upgrading from 256 KB to 512 KB Flash variants without layout modification.
What ADC resolution and channel count does the R5F3651ENFC#U0 provide, and does it include sample-and-hold?
The R5F3651ENFC#U0 features a 10-bit successive-approximation ADC with 26 input channels and integrated sample-and-hold circuitry. This allows simultaneous sampling across multiple analog inputs - such as motor phase currents and DC-link voltage - with guaranteed acquisition time and conversion linearity across the full −40°C to +85°C operating range.
R5F3651ENFC#U0 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Renesas
- Package/Case:
- 128-LQFP
- Series:
- M16C™ M16C/60/65
- Packaging:
- Tray
- Product Status:
- Active
- Programmable:
- -
- Core Processor:
- M16C/60
- Core Size:
- 16-Bit
- Speed:
- 32MHz
- Connectivity:
- EBI/EMI, I2C, SIO, UART/USART
- Peripherals:
- DMA, LVD, POR, PWM, WDT
- Number of I/O:
- 111
- Program Memory Size:
- 256KB (256K x 8)
- Program Memory Type:
- FLASH
- EEPROM Size:
- 8K x 8
- RAM Size:
- 20K x 8
- Voltage - Supply (Vcc/Vdd):
- 2.7V ~ 5.5V
- Data Converters:
- A/D 26x10b; D/A 2x8b
- Oscillator Type:
- Internal
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
R5F3651ENFC#U0 FAQ
1.How can I place an order for R5F3651ENFC#U0 through Aetrix?
Please submit a Request for Quotation (RFQ) for R5F3651ENFC#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 R5F3651ENFC#U0 reliable?
The price and inventory of R5F3651ENFC#U0 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for R5F3651ENFC#U0 is usually 5 days.
3.What payment methods are accepted for R5F3651ENFC#U0?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for R5F3651ENFC#U0 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for R5F3651ENFC#U0?
R5F3651ENFC#U0 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your R5F3651ENFC#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 R5F3651ENFC#U0?
For technical support, including R5F3651ENFC#U0 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your R5F3651ENFC#U0 requirements.
6.How does Aetrix verify that R5F3651ENFC#U0 is sourced from the original manufacturer or authorized distributors?
All R5F3651ENFC#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 R5F3651ENFC#U0 meets industry standards.
7.What is the process for return or replacement of R5F3651ENFC#U0?
All R5F3651ENFC#U0 units undergo pre-shipment inspection (PSI). If there is an issue with R5F3651ENFC#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 R5F3651ENFC#U0 part is unused and in its original packaging.
Return procedure for R5F3651ENFC#U0:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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