Renesas R5F3650ENFA#U0

Overview

R5F3650ENFA#U0 from Renesas is a 16-bit M16C/60 Series CPU core microcontroller with 256 KB program ROM, 20 KB RAM, and 4 KB × 2 blocks data flash, operating at up to 32 MHz (31.25 ns min instruction time) across 2.7–5.5 V supply. It integrates 10-bit A/D converter (26 channels), dual 8-bit D/A converters, CEC interface, real-time clock, and three-phase motor control timers - deployed in industrial HMI, audio subsystems, and consumer AV equipment.

For engineers reviewing the R5F3650ENFA#U0 datasheet, R5F3650ENFA#U0 pinout, R5F3650ENFA#U0 application, or R5F3650ENFA#U0 equivalent, key selection criteria include its 100-pin QFP package (PRQP0100JD-B), -20°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 R5F3650ENFA#U0 implements the M16C/60 CPU core with 16×16-bit multiplier and MAC instruction support, enabling efficient signal processing in motor control and audio applications. Its memory architecture supports 1 MB address space expandable to 4 MB via external bus interface with configurable wait states and 4 chip select outputs.

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

Key Specifications

Pinout & Package

Package: 100-pin plastic quad flat pack (QFP), type PRQP0100JD-B (previous code: 100P6F-A), 0.65 mm lead pitch, body size 14 × 14 mm, 1.7 mm height. 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 microcontroller applications.

Compared with R5F3650ENFB#U0, the R5F3650ENFA#U0 provides identical functionality in a legacy QFP package optimized for mature manufacturing lines; versus R5F3651ENFC#U0, it trades pin count and memory headroom for compactness and lower assembly cost in space-constrained consumer designs.

Availability

R5F3650ENFA#U0 is available at Aetrix Electronics and suitable for industrial HMI, consumer audio subsystems, and HDMI-CEC-enabled AV equipment requiring stable component supply across long-lifecycle production programs.

Supply support for R5F3650ENFA#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 management ICs for automotive, industrial, and IoT markets.

The M16C/65 Group targets cost-sensitive, real-time embedded applications requiring high peripheral integration and robust EMI immunity - especially in consumer electronics and industrial control where CEC, motor control, and IR remote support are critical.

FAQ

What is the maximum operating frequency and supply voltage range for the R5F3650ENFA#U0?

The R5F3650ENFA#U0 operates at up to 32 MHz with a supply voltage range of 2.7 V to 5.5 V on both VCC1 and VCC2. Minimum instruction execution time is 31.25 ns under these conditions. The device supports wait modes and stop modes for power optimization, and its voltage detector provides three programmable reset thresholds to ensure reliable operation across varying input conditions. This makes the R5F3650ENFA#U0 suitable for battery-backed and wide-input industrial applications.

Does the R5F3650ENFA#U0 support HDMI-CEC functionality, and how is it implemented?

Yes, the R5F3650ENFA#U0 includes dedicated CEC transmit/receive circuitry compliant with the HDMI CEC standard. It uses pin P8_5 (NMI/SD/CEC) as the bidirectional CEC signal line and operates at 32 kHz with built-in arbitration loss detection and automatic ACK output. No external transceiver is required, reducing component count and PCB area. The CEC function is hardware-accelerated, minimizing CPU overhead during command transmission and reception - a key advantage in TV, set-top box, and AV receiver designs using the R5F3650ENFA#U0.

What are the memory resources available on the R5F3650ENFA#U0?

The R5F3650ENFA#U0 features 256 KB of program ROM, 20 KB of RAM, and 4 KB × 2 blocks of data flash memory. Program ROM supports code execution and storage, while data flash offers 10,000 erase cycles - ideal for storing calibration data, user preferences, or firmware update images. The memory architecture supports 1 MB address space expandable to 4 MB via external bus interface, allowing integration of external SRAM or NOR flash when needed. These resources are confirmed in Table 1.5 of the R01DS0031EJ0210 datasheet for the R5F3650ENFA#U0 part number.

How many A/D and D/A converter channels does the R5F3650ENFA#U0 provide, and what are their specifications?

The R5F3650ENFA#U0 integrates a 10-bit A/D converter with 26 input channels and sample-and-hold capability, achieving a conversion time of 1.72 µs. It also includes two independent 8-bit D/A converters. Analog supplies are separated: AVCC and AVSS must be connected to VCC1 and VSS respectively to ensure noise-free conversion. These peripherals are accessible via dedicated pins including P10_0–P10_7 (AN0–AN7), P2_0–P2_7 (AN2_0–AN2_7), and P9_3/P9_4 (DA0/DA1), making the R5F3650ENFA#U0 well-suited for sensor interfacing and analog output control in industrial and consumer applications.

What package type and pin count does the R5F3650ENFA#U0 use, and is it RoHS-compliant?

The R5F3650ENFA#U0 uses a 100-pin plastic quad flat pack (QFP) package, type PRQP0100JD-B (previous code: 100P6F-A), with 0.65 mm lead pitch and 14 × 14 mm body size. It is RoHS-compliant and halogen-free per Renesas standard product definitions. This package is distinct from the LQFP variant (R5F3650ENFB#U0) and the 128-pin versions (e.g., R5F3651ENFC#U0). Pin assignments are fully documented in Figures 1.6 and 1.7 and Tables 1.10–1.11 of the R01DS0031EJ0210 datasheet, confirming compatibility with standard QFP reflow profiles and inspection workflows.