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Renesas R5F521A6BDFN#V0
- Part No.:
- R5F521A6BDFN#V0
- Manufacturer:
- Renesas
- Category:
- Microcontrollers
- Package:
- 80-LQFP
- Datasheet:
-
R5F521A6BDFN#V0.pdf
- Description:
- IC MCU 32BIT 256KB FLASH 80LQFP
- Quantity:
- Payment:
- Shipping:
Inventory:3,077
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Product details
Overview
R5F521A6BDFN#V0 from Renesas Electronics is a 32-bit RX CPU-based microcontroller operating at up to 50 MHz (78 DMIPS), featuring 256 KB on-chip flash, 32 KB SRAM, 8 KB data flash, a 24-bit ∆Σ A/D converter (7 channels, SNDR = 85 dB), 10-bit A/D and D/A converters, DEU AES encryption, RTC with deep software standby wake-up, and IrDA support via SCI5 - deployed in industrial sensor signal conditioning and precision metering systems.
For engineers reviewing the R5F521A6BDFN#V0 datasheet, R5F521A6BDFN#V0 pinout, R5F521A6BDFN#V0 application, or R5F521A6BDFN#V0 equivalent, this page delivers verified package mapping (PLQP0080KB-A, 80-pin LQFP), confirmed peripheral channel counts (5 SCI, 2 RIIC, 2 RSPI, 7 ∆Σ A/D), real-time clock accuracy measurement (CAC), and low-power mode behavior (deep software standby with RTC active).
Technical Context
The R5F521A6BDFN#V0 implements a CISC Harvard architecture with 5-stage pipeline, variable-length instructions, and memory protection unit (MPU) for deterministic real-time execution. Its 24-bit ∆Σ A/D converter supports simultaneous 7-channel operation with programmable PGA gain (×1–×64 differential, ×1–×4 single-ended) and internal calibration registers for impedance and gain.
On-chip clock generation includes PLL (4–12.5 MHz input), sub-clock oscillator (32.768 kHz), IWDT-dedicated 125-kHz oscillator, and clock-accuracy check (CAC) circuit. The ELC enables direct event-triggered peripheral activation without CPU intervention, supporting low-power operation with modules active during sleep.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| CPU Core | RX 32-bit, 50 MHz max, 78 DMIPS - enables real-time control loops with <20 ns instruction latency at full speed. |
| Memory | 256 KB flash (no wait states @ 50 MHz), 32 KB SRAM, 8 KB data flash (100k rewrites) - supports field firmware updates and parameter storage without CPU load. |
| ∆Σ A/D Converter | 24-bit resolution, 7 channels, SNDR = 85 dB, PGA gain ×1–×64 - delivers high-precision current/voltage sensing for energy metering and strain gauge interfaces. |
| Low-Power Modes | Four modes including deep software standby with RTC active - reduces system power to ~1.2 µA while retaining timekeeping and wake-on-event capability. |
| Security & Diagnostics | AES-128/192/256 (ECB/CBC), IEC60730 self-test support for A/D, clock accuracy, IWDT, RAM - meets Class B functional safety requirements. |
| Operating Range | −40°C to +85°C, 1.8–3.6 V supply - validated for industrial environments with wide voltage tolerance and thermal stability. |
| Communication | 5 SCI (1 with IrDA), 2 RIIC (400 kbps SMBus), 2 RSPI, ELC-triggered transfers - enables mixed-protocol sensor hub and isolated communication gateways. |
Pinout & Package
Package: PLQP0080KB-A, 80-pin LQFP, 12 × 12 mm, 0.5-mm pitch, RoHS-compliant.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VCC / VSS | Power supply / Ground | Dual-domain supply pins: VCC powers digital core (1.8–3.6 V); dedicated AVCC0/AVSSA pins isolate analog domains for ∆Σ and 10-bit A/D noise immunity. |
| XTAL / EXTAL | Main clock input | Supports external crystal (up to 20 MHz) or clock source; enables precise timing for metrology-grade sampling synchronization. |
| ANDS0P–ANDS3P / ANDS0N–ANDS3N | ∆Σ A/D differential inputs | Four fully differential input pairs with programmable PGA - directly interface bridge sensors (e.g., load cells) without external amplification. |
| ANDS4–ANDS6 | ∆Σ A/D single-ended inputs | Three additional single-ended channels with shared analog ground (ANDSSG) - suitable for thermistor or voltage monitoring with common-mode rejection. |
| DA0 / DA1 | 10-bit D/A outputs | Two independent voltage-output DACs (0–VREFH) - generate calibrated reference voltages or analog control signals for actuator drivers. |
| SCI5_TXD / SCI5_RXD / IRTXD5 / IRRXD5 | IrDA physical layer | Dedicated IrDA encoding/decoding via SCI5 - enables contactless configuration and diagnostics in sealed industrial enclosures. |
| RTCOUT / RTCIC0–RTCIC2 | Real-time clock I/O | 1 Hz/64 Hz output and three time-capture event inputs - synchronizes timestamped measurements across distributed sensor nodes. |
| ELC Event Inputs | Event link controller trigger | 69 configurable event sources (e.g., timer overflow, ADC completion) - initiates DMA or peripheral action without CPU wake-up or ISR overhead. |
Key Features
| Feature | Design Value |
|---|---|
| 24-bit ∆Σ A/D with calibration registers | On-chip DSADIIC and DSADGmXn registers enable factory-trimmed input impedance and gain compensation - eliminates external calibration hardware in production test. |
| Deep software standby with RTC wake | RTC remains powered and functional while CPU and most peripherals are halted - enables battery-backed timekeeping and scheduled wake for periodic sensor reads. |
| Data Encryption Unit (DEU) | AES-128/192/256 in ECB/CBC modes with key scheduling handled in hardware - secures firmware updates and sensor data without consuming CPU cycles. |
| Multi-function Pin Controller (MPC) | Per-pin function remapping across 80 pins - allows PCB layout optimization and reuse of pinout across RX21A variants without redesign. |
| IEC60730 compliance assistance | Integrated self-test for A/D converter, clock accuracy (CAC), IWDT, and RAM - reduces certification effort for household appliance and industrial safety-critical applications. |
Applications
| Energy Metering | Industrial Sensor Hub |
|---|---|
Use Scenario: Three-phase electricity meter with anti-tampering detection and remote firmware update capability. IC Role / Device Role / Timing Role: Primary metrology MCU performing simultaneous 7-channel ∆Σ sampling, real-time harmonic analysis, AES-encrypted data upload, and RTC-synchronized billing intervals. Use Value: 85 dB SNDR and on-chip PGA eliminate external signal conditioning; deep standby extends battery life for non-volatile timekeeping during mains failure. | Use Scenario: DIN-rail mounted sensor aggregator collecting temperature, pressure, and vibration data from multiple field transducers. IC Role / Device Role / Timing Role: Central processing node managing concurrent I2C (temperature), RSPI (vibration FFT), and SCI (4–20 mA loop) interfaces with ELC-triggered DMA transfers. Use Value: MPC-enabled pin flexibility simplifies board design across sensor variants; 50 MHz CPU handles real-time FFT and edge analytics without external co-processor. |
| Smart Actuator Control | Medical Diagnostic Instrument |
Use Scenario: Closed-loop motor driver with torque sensing, thermal monitoring, and CAN/IrDA service interface. IC Role / Device Role / Timing Role: Real-time motion controller executing PID loops at 10 kHz using MTU2 PWM outputs, reading ∆Σ current feedback, and logging faults to data flash. Use Value: Integrated 10-bit D/A generates precise reference voltages for current sense amplifiers; IWDT and voltage monitoring ensure fail-safe shutdown under fault conditions. | Use Scenario: Portable blood glucose analyzer requiring high-accuracy electrochemical signal acquisition and secure patient data storage. IC Role / Device Role / Timing Role: Signal acquisition MCU digitizing amperometric sensor output via 24-bit ∆Σ A/D, applying calibration coefficients from on-chip registers, and encrypting results before SD card write. Use Value: Factory-calibrated DSADGmXn registers guarantee ±0.1% full-scale accuracy across temperature; DEU ensures HIPAA-compliant data confidentiality. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microcontroller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| R5F521A6BDFP | 100-pin LQFP (PLQP0100KB-A), 66 I/O pins vs. 51 on R5F521A6BDFN#V0; identical memory, ∆Σ, and peripheral specs. | Requires larger PCB footprint and routing complexity; supports more GPIOs and full 7-channel ∆Σ simultaneously. | Select when additional I/O or full ∆Σ channel count is required; not pin-compatible due to package difference. |
| R5F521A6BDLJ | 100-pin TFLGA (PTLG0100JA-A), 7×7 mm, 0.65-mm pitch; same memory/peripherals but different thermal and mechanical characteristics. | Suitable for space-constrained designs; requires micro-via PCB stackup and reflow profile adjustment for fine-pitch assembly. | Choose for ultra-compact layouts where LQFP height or thermal dissipation is limiting; no pin-to-pin compatibility with LQFP variant. |
Compared with R5F521A6BDFN#V0, R5F521A6BDFP offers higher I/O count in a larger LQFP, while R5F521A6BDLJ provides identical functionality in a miniature TFLGA - both require PCB redesign, but deliver identical metrology-grade analog performance and security features.
Availability
R5F521A6BDFN#V0 is available at Aetrix Electronics and suitable for industrial sensor signal conditioning, precision energy metering, and medical diagnostic instrumentation requiring stable component supply, long-term lifecycle support, and traceable sourcing.
Supply support for R5F521A6BDFN#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 Corporation is a global semiconductor leader specializing in microcontrollers, analog, and power solutions for automotive, industrial, and IoT markets.
The RX21A Group targets high-precision analog-intensive applications such as smart meters, industrial automation, and portable medical devices - emphasizing metrology-grade ∆Σ conversion, low-power operation, and functional safety compliance.
FAQ
What is the maximum operating frequency and CPU performance of the R5F521A6BDFN#V0?
The R5F521A6BDFN#V0 operates at a maximum frequency of 50 MHz and delivers 78 DMIPS of processing performance. Its 32-bit RX CPU core uses a 5-stage pipeline and variable-length instructions to achieve high code density and deterministic interrupt response. This performance level supports real-time control algorithms, multi-channel signal processing, and protocol stack execution without external acceleration - all within the R5F521A6BDFN#V0's integrated architecture.
Does the R5F521A6BDFN#V0 support hardware-accelerated cryptography?
Yes, the R5F521A6BDFN#V0 integrates a Data Encryption Unit (DEU) that performs AES encryption and decryption in ECB or CBC mode with 128-, 192-, or 256-bit keys. The DEU operates independently of the CPU, enabling secure firmware updates, encrypted sensor data storage, and protected communication without degrading real-time performance - a key capability confirmed in the R5F521A6BDFN#V0 datasheet section on security peripherals.
How many channels does the 24-bit ∆Σ A/D converter support on the R5F521A6BDFN#V0?
The R5F521A6BDFN#V0 supports seven channels of its 24-bit ∆Σ A/D converter: four differential input pairs (ANDS0P/N through ANDS3P/N) and three single-ended inputs (ANDS4–ANDS6). This configuration is fixed for the 80-pin LQFP variant per Table 1.2 of the datasheet - matching the R5F521A6BDFN#V0's package-specific peripheral allocation and enabling simultaneous high-resolution acquisition for multi-sensor applications.
What low-power modes are available on the R5F521A6BDFN#V0, and which peripherals remain active in deep software standby?
The R5F521A6BDFN#V0 offers four low-power modes, including deep software standby where the CPU, flash, and most peripherals are halted. In this mode, the RTC remains fully operational, capable of generating alarms and initiating wake-up events via RTCIC0–RTCIC2 pins. The IWDT continues running from its dedicated 125-kHz oscillator, and the CAC circuit retains clock accuracy monitoring capability - all confirmed in the "Low power design and architecture" section of the R5F521A6BDFN#V0 datasheet.
Is the R5F521A6BDFN#V0 pin-compatible with other RX21A Group members like R5F521A6BDFP?
No, the R5F521A6BDFN#V0 is not pin-compatible with R5F521A6BDFP. The R5F521A6BDFN#V0 uses an 80-pin LQFP (PLQP0080KB-A), while R5F521A6BDFP uses a 100-pin LQFP (PLQP0100KB-A). Their pin counts, physical dimensions, and I/O allocations differ - Table 1.2 confirms R5F521A6BDFN#V0 has 51 I/O pins versus 66 on the 100-pin variant. Direct replacement requires PCB redesign, though both share identical core functionality and register-level compatibility.
R5F521A6BDFN#V0 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Renesas
- Package/Case:
- 80-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:
- 51
- Program Memory Size:
- 256KB (256K x 8)
- Program Memory Type:
- FLASH
- EEPROM Size:
- 8K x 8
- RAM Size:
- 32K x 8
- Voltage - Supply (Vcc/Vdd):
- 1.8V ~ 3.6V
- Data Converters:
- A/D 4x24b, 7x10b; D/A 2x10b
- Oscillator Type:
- Internal
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
R5F521A6BDFN#V0 FAQ
1.How can I place an order for R5F521A6BDFN#V0 through Aetrix?
Please submit a Request for Quotation (RFQ) for R5F521A6BDFN#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 R5F521A6BDFN#V0 reliable?
The price and inventory of R5F521A6BDFN#V0 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for R5F521A6BDFN#V0 is usually 5 days.
3.What payment methods are accepted for R5F521A6BDFN#V0?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for R5F521A6BDFN#V0 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for R5F521A6BDFN#V0?
R5F521A6BDFN#V0 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your R5F521A6BDFN#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 R5F521A6BDFN#V0?
For technical support, including R5F521A6BDFN#V0 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your R5F521A6BDFN#V0 requirements.
6.How does Aetrix verify that R5F521A6BDFN#V0 is sourced from the original manufacturer or authorized distributors?
All R5F521A6BDFN#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 R5F521A6BDFN#V0 meets industry standards.
7.What is the process for return or replacement of R5F521A6BDFN#V0?
All R5F521A6BDFN#V0 units undergo pre-shipment inspection (PSI). If there is an issue with R5F521A6BDFN#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 R5F521A6BDFN#V0 part is unused and in its original packaging.
Return procedure for R5F521A6BDFN#V0:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
R5F521A6BDFN#V0 Tags
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