Renesas R5F3651MDFC#U0

Overview

R5F3651MDFC#U0 from Renesas Electronics is a 16-bit M16C/60 Series CPU core microcontroller with 512 KB program ROM, 31 KB data flash, and 16 KB RAM, operating at up to 32 MHz (31.25 ns min instruction time) across -40°C to +85°C. It integrates dual A/D converters (10-bit × 26 channels), two 8-bit D/A outputs, CEC interface for HDMI control, three-phase motor control timers, and real-time clock - deployed in industrial motor drives and consumer audio/video systems.

For engineers reviewing the R5F3651MDFC#U0 datasheet, R5F3651MDFC#U0 pinout, R5F3651MDFC#U0 application, or R5F3651MDFC#U0 equivalent, key selection criteria include its 128-pin LQFP package (PLQP0128KB-A), CEC compliance, 10-bit ADC conversion time of 1.72 µs, on-chip dead-time timer for inverter control, and support for external bus expansion up to 4 MB.

Technical Context

The R5F3651MDFC#U0 implements the M16C/60 CPU core with hardware multiplier (16×16→32 bit) and MAC instruction, enabling deterministic real-time motor control loops. Its peripheral set includes six 16-bit Timer B units for pulse width/period measurement and three-phase inverter timing, plus five 16-bit Timer A units supporting encoder input and PWM generation.

It features a multi-master I²C-bus interface, six UART/SIO channels (including SIM mode), CEC transceiver (32 kHz operation), and CRC-CCITT/CRC-16 calculator - all synchronized to a flexible clock system with main/sub oscillators, 40 MHz ±10% on-chip oscillator, PLL synthesizer, and programmable frequency dividers (1/2/4/8/16).

Key Specifications

Pinout & Package

128-pin LQFP package (PLQP0128KB-A), with separate VCC1 (core/I/O) and VCC2 (external bus) power domains, AVCC/AVSS for analog subsystem, and dedicated pins for CEC (P8_5), RTCOUT (P6_0), and three-phase motor control (TA1OUT/TA2OUT/TA4OUT, TB0IN–TB4IN).

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar microcontroller applications.

Compared with R5F3651EDFC and R5F3651KDFC, the R5F3651MDFC#U0 provides the largest program ROM (512 KB) and same industrial temperature rating (-40°C to +85°C), making it optimal for complex, field-deployed systems requiring long-term firmware extensibility and environmental robustness.

Availability

R5F3651MDFC#U0 is available at Aetrix Electronics and suitable for industrial motor drives, consumer audio/video systems, office equipment controllers, and home appliance main control requiring stable component supply across extended temperature ranges and long product lifecycles.

Supply support for R5F3651MDFC#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 is a global semiconductor leader specializing in microcontrollers, analog, and power solutions for automotive, industrial, and IoT markets.

The M16C/65 Group targets cost-sensitive, high-reliability embedded applications requiring real-time control, mixed-signal integration, and industrial temperature operation - especially motor control, audio/video, and appliance systems.

FAQ

What is the maximum operating frequency and voltage range for the R5F3651MDFC#U0?

The R5F3651MDFC#U0 operates at up to 32 MHz with a minimum instruction execution time of 31.25 ns. It supports a supply voltage range of 2.7 V to 5.5 V for both VCC1 (core/I/O) and VCC2 (external bus), with VCC1 ≥ VCC2. This allows interoperability with both 3.3 V and 5 V system domains while maintaining full performance.

Does the R5F3651MDFC#U0 support CEC functionality, and how is it implemented?

Yes, the R5F3651MDFC#U0 includes a fully integrated HDMI-standard Consumer Electronics Control (CEC) transceiver. It uses pin P8_5 (NMI/SD/CEC) for bidirectional CEC signaling and operates at 32 kHz. The CEC block handles arbitration loss detection, automatic ACK generation, and message framing - eliminating the need for an external CEC PHY in AV receivers and set-top boxes.

How many A/D and D/A converter channels does the R5F3651MDFC#U0 provide, and what are their resolutions?

The R5F3651MDFC#U0 integrates a 10-bit A/D converter with 26 input channels (including P0_0–P0_7, P10_0–P10_7, and ANEX0/ANEX1) and a sample-and-hold circuit. Conversion time is 1.72 µs. It also provides two independent 8-bit D/A converter outputs (DA0 and DA1) on pins P9_3 and P9_4 for analog waveform generation or bias control.

What package type and pin count does the R5F3651MDFC#U0 use?

The R5F3651MDFC#U0 is housed in a 128-pin LQFP package designated PLQP0128KB-A (formerly 128P6Q-A), measuring 20 mm × 20 mm with 0.5 mm lead pitch. It features separate VCC1 and VCC2 power domains, dedicated analog supplies (AVCC/AVSS), and 111 CMOS I/O ports with selectable pull-up resistors.

What motor control features are built into the R5F3651MDFC#U0?

The R5F3651MDFC#U0 includes hardware-accelerated three-phase motor control with dedicated timer resources: Timer A1/A2/A4 and Timer B2 support inverter gate drive, while an on-chip dead-time timer prevents shoot-through. It also provides encoder input (two-phase pulse processing ×3), PWM generation (8-bit ×2 and 16-bit ×5), and real-time current sensing via its 10-bit ADC - enabling complete BLDC/PMSM control without external timers or comparators.