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Renesas R5F521A8BDFP#V0
- Part No.:
- R5F521A8BDFP#V0
- Manufacturer:
- Renesas
- Category:
- Microcontrollers
- Package:
- 100-LQFP
- Datasheet:
-
R5F521A8BDFP#V0.pdf
- Description:
- IC MCU 32BIT 512KB FLSH 100LFQFP
- Quantity:
- Payment:
- Shipping:
Inventory:4,147
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Product details
Overview
R5F521A8BDFP#V0 from Renesas Electronics is a 32-bit RX CPU-based microcontroller with 512 KB on-chip flash, 64 KB SRAM, and 8 KB data flash, operating at up to 50 MHz (78 DMIPS). It integrates a 24-bit ∆Σ A/D converter (7 channels, SNDR = 85 dB), dual 10-bit D/A converters, real-time clock with deep software standby wake-up, and AES-128/192/256 encryption (DEU) - designed for precision industrial sensing and secure embedded control in energy metering and motor drive systems.
For engineers reviewing the R5F521A8BDFP#V0 datasheet, R5F521A8BDFP#V0 pinout, R5F521A8BDFP#V0 application, or R5F521A8BDFP#V0 equivalent, this page delivers verified technical context, package-specific pin mapping, functional alternatives, and supply-ready procurement details - all grounded in the official RX21A Group datasheet R01DS0129EJ0110 Rev.1.10.
Technical Context
The R5F521A8BDFP#V0 implements a CISC Harvard architecture with 5-stage pipeline, 32×32-bit multiplier (1-cycle), 64-bit accumulator, and memory protection unit (MPU). Its clock system includes PLL (4–12.5 MHz input), sub-clock oscillator (32.768 kHz), and dedicated IWDT oscillator (125 kHz), supporting independent ICLK (50 MHz), PCLK (25 MHz), and FCLK (25 MHz) domains.
Peripheral integration centers on event-driven operation: ELC enables direct module triggering without CPU intervention; MPC allows flexible pin assignment across 100-pin LQFP; and DSAD supports simultaneous 7-channel ∆Σ conversion with programmable PGA gain (×1–×64 differential, ×1–×4 single-ended) and calibration registers for impedance/gain compensation.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| CPU Core | RX 32-bit CISC Harvard, 50 MHz max, 78 DMIPS, 64-bit accumulator, MPU, on-chip debug |
| Memory | 512 KB flash (no wait states @50 MHz), 64 KB SRAM, 8 KB data flash (100k rewrites) |
| ∆Σ A/D Converter | 24-bit, 7 channels, SNDR = 85 dB, differential/single-ended inputs, PGA ×1–×64 |
| Other Analog | 10-bit A/D (7 ch, 2.0 μs/ch), 10-bit D/A (2 ch), 2× comparator A/B, temperature sensor |
| Security & Timing | AES-128/192/256 (ECB/CBC), RTC with alarm/capture, IWDT (125 kHz oscillator), CAC clock accuracy check |
| Communications | 5× SCI (1 with IrDA), 2× I²C (400 kbps), 2× RSPI, ELC-triggered transfers, MPC pin remapping |
| Power & Temp | 1.8–3.6 V supply (2.7–3.6 V for ∆Σ A/D), −40°C to +85°C, 8.6 mA @50 MHz (typ) |
Pinout & Package
Package: PLQP0100KB-A, 100-pin LQFP, 14 × 14 mm, 0.5 mm pitch, RoHS-compliant.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VCC / VSS | Power supply / Ground | Dual power domains: digital (VCC/VSS) and analog (AVCC0/AVSS0, AVCCA/AVSSA); decoupling required per datasheet layout guidelines |
| XTAL / EXTAL | Main clock input | Supports external crystal (up to 20 MHz) or clock source; XTAL output, EXTAL input |
| XCIN / XCOUT | Sub-clock oscillator | 32.768 kHz crystal interface for RTC; dedicated low-power clock domain |
| ANDS0P–ANDS3P / ANDS0N–ANDS3N | ∆Σ A/D differential inputs | Four fully differential pairs (8 pins) for high-precision current sensing; require matched PCB routing |
| ANDS4–ANDS6 / ANDSSG | ∆Σ A/D single-ended inputs | Three voltage-sensing inputs referenced to common signal ground (ANDSSG) |
| DA0 / DA1 | D/A converter outputs | 10-bit buffered analog outputs (0 V to VREFH); support calibration via internal reference |
| MTIOC0A–MTIOC5D | MTU2 waveform I/O | 16 PWM/complementary output lines across six 16-bit timer channels; POE# pins control high-Z state |
| SCI5 TXD5/RXD5 / IRTXD5/IRRXD5 | IrDA-capable UART | SCI5 channel supports asynchronous mode and IrDA 1.0 encoding/decoding via dedicated pins |
| RES# | Active-low reset | Asynchronous reset input; triggers power-on reset, voltage monitoring, or watchdog events |
| MD | Mode selection | Static boot-mode configuration pin; must remain stable during operation per hardware design rules |
Key Features
| Feature | Design Value |
|---|---|
| ELC event linking | Direct hardware triggering of 69 event sources (e.g., timer overflow → A/D start) without CPU or interrupt latency |
| MPC pin multiplexing | Dynamic assignment of peripheral functions (SCI, I²C, RSPI, etc.) to multiple GPIO pins, easing PCB layout and revision flexibility |
| Calibrated ∆Σ A/D | Factory-trimmed DSADIIC and DSADGmXn registers enable input impedance and gain error correction for <±0.005% linearity |
| Deep software standby | RTC remains active while CPU and most peripherals halt; wake-up via external event or RTC alarm with sub-μA quiescent current |
| IEC60730 support | Integrated self-test features: A/D disconnection detection, RAM test assist, clock accuracy verification, IWDT diagnostics |
Applications
| Energy Metering | Industrial Motor Control |
|---|---|
|
Use Scenario: High-accuracy polyphase electricity meter with anti-tampering and communication compliance. IC Role / Device Role / Timing Role: Primary metrology MCU performing simultaneous 7-channel ∆Σ sampling of voltage/current, real-time RMS/power calculation, and AES-encrypted data upload via I²C/SCI. Use Value: 85 dB SNDR and factory-calibrated gain/impedance registers ensure Class 0.2 accuracy over temperature; RTC enables time-of-use billing. |
Use Scenario: Closed-loop BLDC/PMSM drive with torque ripple suppression and thermal monitoring. IC Role / Device Role / Timing Role: Real-time motion controller executing FOC algorithms using MTU2 complementary PWM, 10-bit D/A for analog feedback, and temperature sensor for thermal derating. Use Value: 50 MHz CPU + 6-channel MTU2 enables <1 μs PWM dead-time control; ELC-triggered A/D captures current at precise commutation points. |
| Smart Grid Sensors | Secure Industrial IoT Node |
|
Use Scenario: DIN-rail-mounted grid monitor measuring harmonics, THD, and phase imbalance. IC Role / Device Role / Timing Role: Signal acquisition engine acquiring synchronized 24-bit ∆Σ samples across 7 channels, computing FFTs, and timestamping events via RTC capture pins. Use Value: Simultaneous 7-channel ∆Σ conversion eliminates time skew; CAC validates clock integrity for time-stamped measurements. |
Use Scenario: Edge node collecting sensor data and transmitting encrypted telemetry via RSPI-connected LoRaWAN modem. IC Role / Device Role / Timing Role: Secure host MCU managing AES encryption (DEU), secure boot, tamper-detection I/O, and low-power scheduling via deep software standby. Use Value: On-chip DEU offloads encryption from CPU; 100k-cycle data flash stores keys and firmware updates without external EEPROM. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microcontroller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| R5F521A8BGFP#V0 | Same core/peripherals, but rated for −40°C to +105°C; higher thermal derating requirements above +85°C | Required for extended-temperature industrial drives or outdoor smart grid enclosures | Select when ambient operating temperature exceeds +85°C; otherwise identical firmware and layout compatibility |
| R5F521A7BDFP#V0 | 384 KB flash / 64 KB SRAM / same package; lacks one 10-bit A/D channel and one comparator B channel | Suitable for cost-sensitive metering where full 7-channel ∆Σ and dual comparator B are not needed | Choose for BOM cost reduction where memory headroom and analog channel count allow; pin-compatible drop-in |
Compared with R5F521A8BDFP#V0, R5F521A8BGFP#V0 extends temperature range at no performance trade-off, while R5F521A7BDFP#V0 reduces flash capacity and analog resources - enabling tiered product variants without PCB redesign.
Availability
R5F521A8BDFP#V0 is available at Aetrix Electronics and suitable for energy metering, industrial motor control, smart grid sensors, and secure industrial IoT nodes requiring stable component supply, long-term lifecycle assurance, and traceable sourcing.
Supply support for R5F521A8BDFP#V0 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 RX21A Group targets high-precision industrial sensing and secure embedded control, combining metrology-grade ∆Σ A/D, real-time processing, and hardware security in a single-chip solution.
FAQ
What is the maximum operating frequency and CPU performance of the R5F521A8BDFP#V0?
The R5F521A8BDFP#V0 operates at a maximum frequency of 50 MHz, delivering 78 DMIPS performance. Its 32-bit RX CPU core features a 5-stage pipeline, 32×32-bit multiplication in one cycle, and a 64-bit accumulator - enabling deterministic real-time execution for motor control and metrology algorithms. The R5F521A8BDFP#V0 achieves zero-wait-state access to 512 KB flash and 64 KB SRAM at full speed.
Does the R5F521A8BDFP#V0 support simultaneous sampling across all 7 channels of its 24-bit ∆Σ A/D converter?
Yes, the R5F521A8BDFP#V0 supports true simultaneous sampling across all seven 24-bit ∆Σ A/D channels - four differential (ANDS0P/N through ANDS3P/N) and three single-ended (ANDS4–ANDS6). This capability is essential for phase-synchronized measurements in polyphase energy meters and grid analyzers, and is enabled by dedicated internal timing and calibration registers (DSADIIC, DSADGmXn).
What packaging and pin count does the R5F521A8BDFP#V0 use?
The R5F521A8BDFP#V0 uses the PLQP0100KB-A package: a 100-pin LQFP measuring 14 × 14 mm with 0.5 mm pitch. This package provides full peripheral access including all 7 ∆Σ A/D inputs, dual 10-bit D/A outputs, 5 SCI channels (one with IrDA), 2 I²C interfaces, and 16 MTU2 waveform I/O pins - matching the highest-function variant in the RX21A Group datasheet.
How does the R5F521A8BDFP#V0 support IEC60730 functional safety compliance?
The R5F521A8BDFP#V0 includes hardware-assisted IEC60730 features: A/D disconnection detection, clock accuracy measurement (CAC), independent watchdog timer (IWDT) with dedicated oscillator, RAM test assist functions, and self-diagnostic routines for the ∆Σ A/D and 10-bit A/D converters. These are documented in the RX21A Group User's Manual and validated per the R01DS0129EJ0110 datasheet.
Can the R5F521A8BDFP#V0 operate from a 1.8 V supply, and what are the voltage limitations for its analog blocks?
Yes, the R5F521A8BDFP#V0 supports 1.8–3.6 V digital operation, but its 24-bit ∆Σ A/D converter requires 2.7–3.6 V on AVCCA/AVSSA for specified performance. The 10-bit A/D and D/A converters also require ≥2.7 V on AVCC0/VREFH0. Below 2.7 V, only digital peripherals and CPU remain functional - a key constraint for ultra-low-voltage battery-powered designs.
R5F521A8BDFP#V0 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Renesas
- Package/Case:
- 100-LQFP
- Series:
- RX200
- Packaging:
- Tray
- Product Status:
- Active
- Programmable:
- Not Verified
- Core Processor:
- RX
- Core Size:
- 32-Bit Single-Core
- Speed:
- 50MHz
- Connectivity:
- I2C, IrDA, SCI, SPI
- Peripherals:
- DMA, LVD, POR, PWM, WDT
- Number of I/O:
- 66
- Program Memory Size:
- 512KB (512K x 8)
- Program Memory Type:
- FLASH
- EEPROM Size:
- 8K x 8
- RAM Size:
- 64K x 8
- Voltage - Supply (Vcc/Vdd):
- 1.8V ~ 3.6V
- Data Converters:
- A/D 7x24b, 7x10b; D/A 2x10b
- Oscillator Type:
- Internal
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
R5F521A8BDFP#V0 FAQ
1.How can I place an order for R5F521A8BDFP#V0 through Aetrix?
Please submit a Request for Quotation (RFQ) for R5F521A8BDFP#V0 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 R5F521A8BDFP#V0 reliable?
The price and inventory of R5F521A8BDFP#V0 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for R5F521A8BDFP#V0 is usually 5 days.
3.What payment methods are accepted for R5F521A8BDFP#V0?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for R5F521A8BDFP#V0 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for R5F521A8BDFP#V0?
R5F521A8BDFP#V0 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your R5F521A8BDFP#V0 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 R5F521A8BDFP#V0?
For technical support, including R5F521A8BDFP#V0 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your R5F521A8BDFP#V0 requirements.
6.How does Aetrix verify that R5F521A8BDFP#V0 is sourced from the original manufacturer or authorized distributors?
All R5F521A8BDFP#V0 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 R5F521A8BDFP#V0 meets industry standards.
7.What is the process for return or replacement of R5F521A8BDFP#V0?
All R5F521A8BDFP#V0 units undergo pre-shipment inspection (PSI). If there is an issue with R5F521A8BDFP#V0, 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 R5F521A8BDFP#V0 part is unused and in its original packaging.
Return procedure for R5F521A8BDFP#V0:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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