Renesas R5F3650MNFB#V2

Overview

R5F3650MNFB#V2 from Renesas is a 16-bit M16C/60 Series core MCU with 512 KB program ROM, 31 KB data flash, 16 KB RAM, and 85 CMOS I/O ports in a 100-pin LQFP (PLQP0100KB-A) package. It operates at up to 32 MHz, integrates dual A/D converters (10-bit × 26 channels), two 8-bit D/A outputs, CEC interface, and three-phase motor control timers - deployed in industrial HMI panels and consumer audio subsystems.

For engineers reviewing the R5F3650MNFB#V2 datasheet, R5F3650MNFB#V2 pinout, R5F3650MNFB#V2 application, or R5F3650MNFB#V2 equivalent, key selection criteria include its 100-pin LQFP footprint, -40°C to +85°C operating range, integrated CEC transceiver for HDMI-CEC compliance, and on-chip dead-time timer for inverter gate drive timing control.

Technical Context

The R5F3650MNFB#V2 implements the M16C/60 CPU core with 16×16-bit multiplier and MAC instruction support, enabling deterministic real-time control loops. Its memory architecture supports 1 MB address space expandable to 4 MB via external bus interface with 0–8 wait states and 4 chip selects.

Peripheral integration includes six UART/serial channels (UART0–UART2, UART5–UART7), multi-master I²C, two remote control signal receivers (32 kHz operation), and dedicated CEC circuitry compliant with HDMI CEC standard - all synchronized to a flexible clock system featuring main/sub oscillators, 125 kHz and 40 MHz ±10% on-chip oscillators, and PLL frequency synthesizer.

Key Specifications

Pinout & Package

100-pin LQFP package (PLQP0100KB-A), 14 mm × 14 mm body, 0.5 mm pitch, exposed thermal pad. Dual power supply: VCC1 (core/I/O), VCC2 (external bus), AVCC/AVSS (analog domain).

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar 16-bit microcontroller applications.

Compared with R5F3650MDFB#V2, the R5F3650MNFB#V2 offers identical functionality at lower cost for commercial-temperature applications; versus R5F3651MNFC#V2, it trades I/O count and bus expansion for smaller PCB footprint and reduced BOM complexity.

Availability

R5F3650MNFB#V2 is available at Aetrix Electronics and suitable for industrial HMI panels, HDMI-CEC enabled consumer electronics, and motor control subsystems requiring stable component supply across extended product lifecycles.

Supply support for R5F3650MNFB#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 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, real-time embedded systems requiring high peripheral integration, low EMI emissions, and robust noise immunity - especially in audio, home appliance, and industrial control applications.

FAQ

What is the maximum operating frequency of the R5F3650MNFB#V2 and what voltage range supports it?

The R5F3650MNFB#V2 operates at up to 32 MHz when supplied with VCC1 = 2.7 V to 5.5 V and VCC2 = 2.7 V to VCC1. This frequency is sustained across the full industrial temperature range (-40°C to +85°C), with minimum instruction execution time of 31.25 ns confirmed in the datasheet under these conditions. The R5F3650MNFB#V2 uses an internal PLL and high-speed on-chip oscillator (40 MHz ±10%) to achieve this performance without external crystal dependency.

Does the R5F3650MNFB#V2 support HDMI-CEC functionality, and how is it implemented?

Yes, the R5F3650MNFB#V2 includes dedicated CEC circuitry compliant with HDMI CEC v1.4, accessible via pin P8_5 (NMI/SD/CEC). It provides hardware transmit/receive, arbitration loss detection, and automatic ACK output at 32 kHz - eliminating need for external transceivers or bit-banged firmware. The R5F3650MNFB#V2's CEC block operates independently of the CPU core, ensuring reliable command handling even during low-power stop modes.

How many analog-to-digital converter channels does the R5F3650MNFB#V2 have, and what is their resolution and speed?

The R5F3650MNFB#V2 integrates a single 10-bit A/D converter with 26 input channels (AN0_0–AN0_7, AN1–AN7, ANEX0/ANEX1, ADTRG), including sample-and-hold. Conversion time is fixed at 1.72 µs per sample, supporting up to ~581 kSPS aggregate throughput. All channels share one conversion engine; simultaneous sampling is not supported. The R5F3650MNFB#V2 also provides separate AVCC/AVSS supplies to minimize digital noise coupling into analog measurements.

What package type and pin count does the R5F3650MNFB#V2 use, and is it pin-compatible with other M16C/65 variants?

The R5F3650MNFB#V2 uses a 100-pin LQFP package (PLQP0100KB-A), 14 mm × 14 mm body, 0.5 mm pitch. It is pin-compatible with other FB-suffixed M16C/65 MCUs in the same package family (e.g., R5F3650EDFB#V2, R5F3650KNFB#V2) but not with FA-suffixed 100-pin QFP (PRQP0100JD-B) or FC-suffixed 128-pin LQFP variants. Pin compatibility is confirmed by identical pin numbering and function mapping in Tables 1.10–1.11 of the datasheet.

What debug and programming interfaces are supported by the R5F3650MNFB#V2?

The R5F3650MNFB#V2 supports on-chip debugging via Renesas E8/E8a emulators using the standard 14-pin Mictor connector interface. It includes four address match interrupts for precise breakpointing and supports in-system flash rewriting through the built-in bootloader. Programming is performed via the on-chip debug interface or serial download mode using pin P8_5 (SD), with no external programming hardware required. The R5F3650MNFB#V2 does not support JTAG; debugging relies exclusively on Renesas proprietary FINE interface protocol.