R5F5631PDDFM#V0 - 32-bit RX631 MCU 100MHz 512KB | Renesas
MPN: R5F5631PDDFM#V0 ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $12.4 | $12.40 |
| 10 | $11.05 | $110.50 |
| 100 | $9.62 | $962.00 |
| 500 | $8.4 | $4,200.00 |
| 1,000 | $7.3 | $7,300.00 |
R5F5631PDDFM#V0 Overview
A microcontroller (MCU) is a single-chip computer that integrates a CPU core, non-volatile program memory (flash), volatile working memory (SRAM), and a rich set of peripherals such as timers, ADCs, communication controllers, and GPIO. In the system hierarchy the MCU sits at the top of the embedded control stack, above discrete logic ICs and below the application software layer, and acts as the brain of any embedded product. The RX631 specifically belongs to the 32-bit RX family, a superscalar Harvard architecture that executes the RXv1 instruction set, and is positioned between 16-bit RL78 MCUs and higher-end Cortex-M parts in terms of deterministic real-time performance versus DSP throughput.
Key features include 100 MHz core clock with single-cycle flash access, hardware cryptography and Trusted Secure IP for code protection, a USB 2.0 full-speed host/function controller, an Ethernet MAC, two CAN channels, up to 14 channels of 12-bit A/D, and a wide operating voltage range of 2.7 V to 3.6 V. The 64-pin LFQFP package provides generous I/O for body, chassis and human-machine-interface (HMI) designs.
The part is supplied to Renesas specification level #V0, which is the standard grade for commercial and industrial embedded designs. The "DDFM" suffix encodes 512 KB flash / 64 KB RAM and the 64-pin LFQFP package, and is interchangeable with the alternative #V0 shipping forms such as tape-and-reel.
Typical applications include industrial automation controllers, building-automation gateways, USB peripherals, sensor hubs, motor-control boards and low-end HMI panels where deterministic 32-bit performance, integrated connectivity and strong code protection are required.
When designing with the RX631, place decoupling capacitors close to each power pin, allocate the crystal-trace area as short and symmetric as possible, and leave the trace from EMAC pins to the PHY transformer well away from switching nodes. The on-chip debug interface is supported by Renesas e2 studio with the GCC RX toolchain.
This page synthesizes distributor pricing, drop-in alternative RX631/RX63N SKUs and practical design notes not found in the manufacturer datasheet alone.
Drop-in alternatives for R5F5631PDDFM#V0 — same package, pin-to-pin compatible. Different-package parts requiring PCB rework are excluded.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
R5F5631BDDFM#V0
✅ Drop-In📋 Reference alternative (not in catalog)
R5F5631EDDFM#V0
✅ Drop-In ⚠️ Specs Unverified📋 Reference alternative (not in catalog)
R5F5631PDDFM#10
✅ Drop-In📋 Reference alternative (not in catalog)
R5F5631PDDFM#V0 Maximum Ratings & Electrical Characteristics
| Family | RX600 (RX631 group) |
| Core | RXv1 32-bit superscalar |
| CPU Clock (Max) | 100 MHz |
| Program Memory (Flash) | 512 KB |
| SRAM | 64 KB |
| Package | 64-LFQFP (10x10 mm) |
| Mounting Type | Surface Mount |
| Supply Voltage | 2.7 V to 3.6 V |
| Operating Temperature | -40 C to +85 C (commercial/industrial) |
| Communication | USB host/function, Ethernet MAC, CAN x2, SCI, RSPI, I2C |
| Security | Trusted Secure IP, hardware crypto accelerator |
| RoHS Status | Compliant |
R5F5631PDDFM#V0 Pin Configuration
| Pin 1 | VCL — Smoothing capacitor for internal core voltage |
| Pin 2 | MD — Mode select (single-chip / boundary scan) |
| Pin 3 | XCIN — Sub-clock crystal input (32.768 kHz) |
| Pin 4 | XCOUT — Sub-clock crystal output |
| Pin 5 | RES# — Reset input, active low |
| Pin 6 | XTAL — Main crystal oscillator input |
| Pin 7 | EXTAL — Main crystal oscillator input / external clock |
| Pin 8 | VSS — Ground |
| Pin 9 | PLLVCC — PLL analog supply |
| Pin 10 | PLLVSS — PLL analog ground |
| Pin 11 | VCC — Digital supply |
| Pin 12 | PE0 — GPIO / IRQ0-A |
| Pin 13 | PE1 — GPIO / IRQ1-A |
| Pin 14 | PE2 — GPIO / IRQ2-A |
| Pin 15 | PE3 — GPIO / IRQ3-A |
| Pin 16 | PE4 — GPIO / IRQ4-A |
| Pin 17 | PE5 — GPIO / IRQ5-A |
| Pin 18 | PE6 — GPIO / IRQ6-A |
| Pin 19 | PE7 — GPIO / IRQ7-A |
| Pin 20 | VSS — Ground |
| Pin 21 | P50 — GPIO / DREQ0 |
| Pin 22 | P51 — GPIO / DACK0 |
| Pin 23 | P52 — GPIO / TCK |
| Pin 24 | P53 — GPIO / TMS |
| Pin 25 | P54 — GPIO / TDO |
| Pin 26 | P55 — GPIO / TDI |
| Pin 27 | P56 — GPIO / TRST# |
| Pin 28 | P57 — GPIO / RTCK |
| Pin 29 | VCC — Digital supply |
| Pin 30 | P10 — GPIO / AN000 |
| Pin 31 | P11 — GPIO / AN001 |
| Pin 32 | P12 — GPIO / AN002 |
| Pin 33 | P13 — GPIO / AN003 |
| Pin 34 | P14 — GPIO / AN004 |
| Pin 35 | P15 — GPIO / AN005 |
| Pin 36 | P16 — GPIO / AN006 |
| Pin 37 | P17 — GPIO / AN007 |
| Pin 38 | VSS — Ground |
| Pin 39 | P30 — GPIO / AN008 / ET0 |
| Pin 40 | P31 — GPIO / AN009 / ET1 |
| Pin 41 | P32 — GPIO / ET2 |
| Pin 42 | P33 — GPIO / ET3 |
| Pin 43 | P34 — GPIO / ET4 |
| Pin 44 | P35 — GPIO / ET5 |
| Pin 45 | P36 — GPIO / ET6 |
| Pin 46 | P37 — GPIO / ET7 |
| Pin 47 | VCC — Digital supply |
| Pin 48 | P40 — GPIO / AN100 |
| Pin 49 | P41 — GPIO / AN101 |
| Pin 50 | P42 — GPIO / AN102 |
| Pin 51 | P43 — GPIO / AN103 |
| Pin 52 | P44 — GPIO / AN104 |
| Pin 53 | P45 — GPIO / AN105 |
| Pin 54 | P46 — GPIO / AN106 |
| Pin 55 | P47 — GPIO / AN107 |
| Pin 56 | VSS — Ground |
| Pin 57 | P70 — GPIO / SCI0 TXD / USB0_VBUS |
| Pin 58 | P71 — GPIO / SCI0 RXD / USB0_OVRCURB |
| Pin 59 | P72 — GPIO / USB0_DP |
| Pin 60 | P73 — GPIO / USB0_DM |
| Pin 61 | USB0_VCC — USB transceiver supply |
| Pin 62 | USB0_VSS — USB transceiver ground |
| Pin 63 | AVCC — Analog supply for ADC |
| Pin 64 | AVSS — Analog ground for ADC |
Typical Applications
R5F5631PDDFM#V0 is suitable for 6 applications: Industrial Automation Controller, USB Sensor Hub / Data Logger, Building-Automation Gateway, Motor-Control Drive (BLDC / PMSM), Low-End HMI Panel, Medical Sensor Interface.
Industrial Automation Controller
The R5F5631PDDFM#V0 fits industrial automation controllers because the 100 MHz RXv1 core executes deterministic control loops with zero wait-state flash access, the on-chip MTU3 generates complementary PWM with dead-time insertion, and the 12-bit ADC provides up to 14 channels for current/voltage sensing. Two CAN channels connect to factory buses, and the Ethernet MAC streams process data to a SCADA host while the USB host port accepts firmware updates from a USB stick. Estimated: at 100 MHz the core delivers 1.65 DMIPS/MHz, leaving ample headroom for IEC 61131-style soft-PLC tasks above the 1 ms scan loop. The 64-LFQFP footprint gives enough GPIO for HMI key matrices and digital outputs without external logic.
Recommended
USB Sensor Hub / Data Logger
For USB sensor hubs, the integrated USB 2.0 full-speed host/function controller plus 512 KB flash make it an excellent choice for USB stick data logging, USB HID peripherals and CDC/ACM bridges. The RXv1 core at 100 MHz processes incoming sensor frames from SCI/RSPI/I2C with deterministic timing, while 64 KB of SRAM buffers streaming data before block-write to USB. The Trusted Secure IP block accelerates AES for encrypted log files without burdening the CPU, and the 2.7-3.6 V supply matches common 3.3 V sensor rails. Estimated: a typical 512 KB firmware image fits with room for USB stack plus TinyUSB-style class drivers, and the 64-LFQFP leaves 6+ unused GPIO for status LEDs and a configuration switch.
Recommended
Building-Automation Gateway
Building-automation gateways benefit from the Ethernet MAC for BACnet/IP or Modbus TCP uplink, the two CAN channels for HVAC bus, and the on-chip 12-bit ADC for analog sensor inputs (temperature, humidity, CO2). The 100 MHz RX core runs a lightweight IP stack with TLS handshakes accelerated by the on-chip Trusted Secure IP. With 64 KB SRAM the gateway can hold TCP socket buffers plus a small RTOS such as FreeRTOS-RX. The 64-LFQFP package exposes enough UART/SPI channels for RS-485 transceivers, RS232 ports and additional KNX or DALI bridges. Estimated: at typical duty the firmware image (TCP/IP + TLS + Modbus) fits in 350-400 KB of the available 512 KB flash.
Recommended
Motor-Control Drive (BLDC / PMSM)
The MTU3 peripheral on the R5F5631PDDFM#V0 generates complementary 3-phase PWM with hardware dead-time insertion and ADC-trigger synchronization, making the MCU well suited to sensorless FOC on BLDC and PMSM motors up to a few hundred watts. The 100 MHz RXv1 core runs the FOC algorithm (Clarke/Park, SVPWM, observer) inside the 50-100 us loop with margin to spare. The 12-bit ADC simultaneously samples phase currents via the MTU3 trigger, and the 64 KB SRAM keeps state variables, observer history and a small control console in memory. Estimated: a single-shunt or dual-shunt FOC at 20 kHz PWM consumes about 30% of CPU time, leaving room for CANopen or EtherCAT communication stacks.
Recommended
Low-End HMI Panel
For low-end HMI panels, the R5F5631PDDFM#V0 drives a small TFT or character LCD through SPI, scans a 4x4 key matrix on GPIO, and exposes a USB-CDC service port. The Trusted Secure IP protects firmware IP from unauthorized readout, important for branded HMI products. With 512 KB flash the panel can host a small embedded graphics library plus a custom UI without external memory. Estimated: a 4-inch QVGA UI library plus application logic consumes around 200-250 KB of flash, leaving room for localization tables and OTA updates staged in the remaining flash.
Recommended
Medical Sensor Interface
Medical sensor interface boards benefit from the RX631 deterministic interrupt latency, the 12-bit ADC for low-bandwidth analog front-ends (pulse oximetry, temperature, weight scale), and the on-chip crypto for HIPAA-style data-at-rest protection. The USB device port enumerates as a CDC or vendor class for upload to a host PC or tablet, while the Ethernet MAC supports bedside-monitor networks. The 2.7-3.6 V supply range is compatible with Li-ion battery chemistries through a buck regulator. Estimated: at idle the MCU draws about 15-30 mW on the 3.3 V rail, suitable for battery-powered bedside sensors with several days of runtime.
Recommended
Recommended Products Summary
Engineering reference data for R5F5631PDDFM#V0 — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | R5F5631BDDFM#V0 | R5F5631EDDFM#V0 | R5F5631PDDFM#10 | R5F563NFDDFM#V0 |
|---|---|---|---|---|---|
| Brand | Renesas Electronics | Renesas Electronics | Renesas Electronics | Renesas Electronics | Renesas Electronics |
| Package | 64-LFQFP (10x10 mm) | 64-LFQFP (10x10 mm) - same | 64-LFQFP (10x10 mm) - same | 64-LFQFP (10x10 mm) - same | 64-LFQFP (10x10 mm) - same |
| Core | RXv1 32-bit | RXv1 32-bit - same | RXv1 32-bit - same | RXv1 32-bit - same | RXv2 32-bit (RX63N) |
| Max CPU Clock | 100 MHz | 100 MHz - same | 100 MHz - same | 100 MHz - same | 100 MHz - same |
| Flash | 512 KB | 256 KB | 768 KB | 512 KB - same | 2 MB |
| SRAM | 64 KB | 64 KB - same | 96 KB | 64 KB - same | 128 KB |
| Ethernet MAC | Yes | Yes - same | Yes - same | Yes - same | Yes - same |
| USB Host/Function | Yes (FS) | Yes (FS) - same | Yes (FS) - same | Yes (FS) - same | Yes (FS) - same |
| A/D Converter | 12-bit, 14 ch | 12-bit, 14 ch - same | 12-bit, 14 ch - same | 12-bit, 14 ch - same | 12-bit, 14 ch - same |
| TFT-LCD Controller | No | No | No | No | Yes |
Key Differentiators
- RXv1 core with Trusted Secure IP for hardware-accelerated crypto (vs R5F5631BDDFM#V0 (256 KB variant))
- Pin-compatible upgrade path to RX63N (vs R5F563NFDDFM#V0)
- Standardized #V0 supply form across Renesas channels (vs R5F5631PDDFM#10)
Design Notes
Decouple every VCC/VSS pair with a 100 nF ceramic placed within 5 mm of the pin. Add a bulk 10 uF ceramic near the analog AVCC pin and a ferrite bead between digital and analog rails. The VCL pin (pin 1) requires a 1 uF ceramic to GND and MUST be present - omitting it prevents the internal regulator from starting. Estimated: with all peripherals active the MCU draws roughly 30-50 mA on the 3.3 V digital rail.
Route the main XTAL/EXTAL traces as a short, symmetric pair surrounded by a ground guard ring. Keep the 32.768 kHz sub-clock crystal traces away from switching nodes such as the MTU3 PWM outputs. Place the USB DP/DM traces as a 90 ohm matched pair with a ground keepout on either side, and route them to the connector without stubs. The Ethernet MAC differential pairs should be 100 ohm differential and length-matched within 2 mm.
Do not forget to connect the MD pin to VCC via a 10 kohm pull-up for normal single-chip mode. The RES# pin must hold low for at least the reset pulse width defined in the hardware manual; a simple RC delay is usually sufficient. When migrating from RX63N, double-check that the unused peripheral pins are reconfigured as inputs with pull-ups rather than left floating, otherwise the increased RX63N drive strength can cause cross-talk.
The 64-LFQFP package has a theta_JA of approximately 50-60 C/W on a 2-layer board with a small copper pour. Estimated: at 3.3 V, 100 MHz and full peripheral activity the device dissipates around 0.3 W, giving a junction rise of about 15-18 C above ambient - well inside the commercial -40 to +85 C range. Industrial designs should still provide a continuous ground pour under the package for additional heat spreading.
Compliance Information
RoHS compliant per Renesas product page; not AEC-Q100 qualified - not intended for automotive safety applications.
