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Renesas R5F2L3A7CNFA#U0
- Part No.:
- R5F2L3A7CNFA#U0
- Manufacturer:
- Renesas
- Category:
- Microcontrollers
- Package:
- 100-BQFP
- Datasheet:
-
R5F2L3A7CNFA#U0.pdf
- Description:
- IC MCU 16BIT 48KB FLASH 100QFP
- Quantity:
- Payment:
- Shipping:
Inventory:4,504
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Product details
Overview
R5F2L3A7CNFA#U0 from Renesas is an 8-bit R8C/L3AC Group microcontroller with 48 KB flash, 6 KB RAM, 20-channel 10-bit ADC, 56-segment LCD driver, and 88 programmable I/O pins in a 100-pin QFP package. It integrates timers RA–RG, UART0/1/2, I²C, LIN, DTC, and background operation (BGO) data flash for embedded control in appliance and industrial HMI applications.
For engineers reviewing the R5F2L3A7CNFA#U0 datasheet, R5F2L3A7CNFA#U0 pinout, R5F2L3A7CNFA#U0 application, or R5F2L3A7CNFA#U0 equivalent, key selection criteria include its 100-pin QFP footprint, -20°C to +85°C operating range (N version), integrated LCD bias regulator, and 20-channel analog input capability for sensor-rich user interfaces.
Technical Context
The R5F2L3A7CNFA#U0 implements the R8C CPU core with 89 instructions, 16×16→32-bit hardware multiplier, and 1 Mbyte address space. It supports four clock sources: XIN (up to 20 MHz), XCIN (32 kHz), high-speed on-chip oscillator (adjustable), and low-speed on-chip oscillator - enabling flexible power/performance trade-offs across wait, stop, and power-off modes.
Its peripheral set includes Timer RD (16-bit ×2, 6-pin PWM, complementary/triangular modulation), Timer RG (16-bit, phase counting), and UART2 with I²C-bus mode. The integrated LCD controller drives up to 8 commons and 56 segments with internal voltage multiplier and dedicated regulator, eliminating external bias components.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| CPU Core | R8C 8-bit core with 16×16→32-bit multiplier and 89-instruction set |
| Flash / RAM | 48 KB program flash + 4 KB data flash (BGO-capable); 6 KB SRAM |
| ADC | 10-bit resolution × 20 channels with sample-and-hold and sweep mode |
| LCD Driver | Supports up to 8 common outputs and 56 segment outputs; integrated VL1–VL4 bias regulation |
| I/O Pins | 88 programmable CMOS I/O ports with selectable pull-up resistors; 16 high-current drive pins |
| Timers | Timer RA–RE + RG (8- to 16-bit); Timer RD enables 3-phase motor control via complementary PWM |
| Serial Interfaces | UART0/1/2 (UART2 supports I²C-bus mode); SSU/I²C shared bus; hardware LIN module |
| Operating Range | -20°C to +85°C ambient; VCC = 1.8–5.5 V; 20 MHz max XIN frequency at ≥2.7 V |
Pinout & Package
Package: PRQP0100JD-B - 100-pin QFP, 0.65 mm pitch, body size 14.0 × 14.0 mm, exposed pad not specified.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| P0_0–P0_7 | Segment output / Analog input (AN4–AN9) | Drive LCD segments SEG0–SEG7; serve as ADC inputs with internal sample-and-hold |
| P1_0–P1_7 | Segment output / Analog input (AN12–AN15) | Drive LCD segments SEG8–SEG15; provide additional ADC channels for multi-sensor UI |
| P2_0–P2_7 | Segment output / Key input (KI0–KI7) | Drive SEG16–SEG23; support direct keypad scanning without external logic |
| P3_0–P3_7 | Segment output / External interrupt (INT0–INT7) | Drive SEG24–SEG31; enable edge-triggered wake-up from low-power modes |
| P4_0–P4_7 | Segment output / UART/CLK/TRC signals | Drive SEG32–SEG39; multiplexed with UART1, timer capture, and trace clock functions |
| P6_0–P6_7 | Segment output / Timer RD I/O (TRDIOA0–TRDIOD1) | Drive SEG44–SEG51; directly interface with 3-phase motor gate drivers via complementary PWM |
| P7_0–P7_7 | Common output (COM0–COM7) | Provide 8 LCD common lines; support static, 1/2–1/8 duty drive schemes |
| VL1–VL4 | LCD bias voltage outputs | Internal regulated outputs for 1/2, 1/3, or 1/4 bias; eliminate external resistor networks |
| CL1 / CL2 | LCD clock inputs | Accept external clock for precise LCD frame timing; configurable via LCKCR register |
| XIN / XOUT | External crystal oscillator connection | Support 1–20 MHz crystals; required for high-accuracy timing and USB-free communication |
| XCIN / XCOUT | 32.768 kHz watch crystal connection | Enable RTC (Timer RE) and low-power wake-up without main system clock |
| RESET | Active-low reset input | Asynchronous reset with internal pull-up; compatible with open-drain supervisors |
| MODE | Boot mode selection | Configures boot source (ROM vs. user flash) at power-on; tied high for standard operation |
Key Features
| Feature | Design Value |
|---|---|
| Background Operation (BGO) | Enables real-time data flash erase/write during program execution - critical for firmware updates and parameter logging without halting control loops |
| Integrated LCD Bias Regulator | Provides VL1–VL4 outputs with internal voltage multiplier; eliminates 4–6 external resistors and reduces BOM cost by ~$0.12 per unit |
| Complementary PWM (Timer RD) | Generates synchronized high-side/low-side gate drive signals with programmable dead time - supports BLDC and PMSM motor control without external gate drivers |
| Hardware LIN Module | Offloads LIN 2.1 protocol handling (break detection, sync field, checksum) from CPU - reduces ISR latency and frees >15% CPU bandwidth for application code |
| DTC (Data Transfer Controller) | Single-channel DMA supporting 38 activation sources; moves ADC results or UART buffers autonomously - cuts CPU load by up to 40% in sensor acquisition tasks |
| Low-Power Modes | Stop mode draws 2 µA; power-off mode draws 0.02 µA - extends battery life in portable HMIs beyond 5 years on CR2032 |
Applications
| Microwave Oven Control Panel | Industrial PLC HMI Terminal |
|---|---|
Use Scenario: Real-time monitoring of cooking time, power level, and door interlock status with 4-digit LED/LCD display and tactile keypad. IC Role / Device Role / Timing Role: Main system controller executing state machine, reading 12-key matrix, driving 56-segment LCD, and managing relay/SSR outputs. Use Value: Integrated 20-channel ADC reads temperature sensors, current shunts, and potentiometers; BGO allows calibration data storage during operation. | Use Scenario: Local operator interface for DIN-rail mounted PLCs, displaying I/O status, alarm history, and configuration menus via 128×64 dot-matrix LCD. IC Role / Device Role / Timing Role: Dedicated HMI processor handling graphics rendering, touch/key scan, serial comms (LIN/UART), and non-volatile settings storage. Use Value: 88 I/O pins support parallel LCD interface and expansion headers; 100-pin QFP ensures mechanical stability in vibration-prone cabinets. |
| Smart Thermostat Display | Home Appliance Remote Control Hub |
Use Scenario: Battery-powered wall-mounted thermostat with ambient/humidity sensing, HVAC actuation, and segmented LCD showing setpoint, schedule, and mode icons. IC Role / Device Role / Timing Role: Low-power system-on-chip managing sensor fusion (I²C temp/humidity), LCD refresh, and wireless co-processor interface (UART). Use Value: 2 µA stop mode and RTC (Timer RE) maintain timekeeping for scheduling; integrated voltage detection prevents brown-out resets during battery depletion. | Use Scenario: Central IR/RF hub aggregating commands from multiple remotes, translating protocols, and controlling lighting, audio, and climate subsystems via UART/LIN. IC Role / Device Role / Timing Role: Protocol translation engine with dual UARTs (one for host MCU, one for IR transceiver), LIN master for sub-devices, and EEPROM emulation in data flash. Use Value: Hardware LIN module handles physical layer timing and error recovery; 4 KB data flash with BGO stores learned IR codes persistently across power cycles. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar 8-bit MCU applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| R5F2L3A7CNFP | Same core, memory, and peripherals; differs only in package (100-pin LQFP, 0.50 mm pitch vs. QFP's 0.65 mm) | Requires PCB redesign due to different land pattern and pitch; identical firmware compatibility | Select CNFP for automated optical inspection (AOI)-friendly LQFP; choose CNFA#U0 for legacy QFP assembly lines. |
| R5F2L3A8CNFA#U0 | 64 KB flash (+16 KB), same RAM, I/O count, and peripheral set; otherwise pin-identical | Suitable where future firmware expansion or bootloader partitioning is required; no hardware change needed | Choose CNFA#U0 for minimal-cost production; upgrade to R5F2L3A8CNFA#U0 when firmware exceeds 48 KB or secure boot features are added. |
Compared with R5F2L3A7CNFA#U0, R5F2L3A7CNFP requires PCB layout revision but offers tighter pitch for higher-density designs, while R5F2L3A8CNFA#U0 delivers immediate flash headroom without any hardware modification - making it the preferred upgrade path for long-lifecycle appliance programs.
Availability
R5F2L3A7CNFA#U0 is available at Aetrix Electronics and suitable for microwave oven control panels, industrial HMI terminals, smart thermostats, and home automation hubs requiring stable component supply across multi-year production runs.
Supply support for R5F2L3A7CNFA#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 Corporation is a global semiconductor leader specializing in microcontrollers, analog, power, and SoC solutions for automotive, industrial, and IoT markets.
The R8C/L3AC Group targets cost-sensitive, LCD-equipped embedded systems requiring robust analog integration, low-power operation, and long product lifecycles - especially in white goods and building automation.
FAQ
What is the maximum operating frequency of the R5F2L3A7CNFA#U0 and under what voltage conditions?
The R5F2L3A7CNFA#U0 supports a maximum operating frequency of 20 MHz when supplied with VCC ≥ 2.7 V. At lower voltages (1.8–2.6 V), the maximum frequency is reduced to 5 MHz to ensure stable operation and meet timing margins across process and temperature variations.
Does the R5F2L3A7CNFA#U0 support true hardware LIN communication, and which peripheral resources does it use?
Yes, the R5F2L3A7CNFA#U0 includes a dedicated hardware LIN module compliant with LIN 2.1. It uses Timer RA for baud rate generation and UART0 for data framing and checksum calculation - offloading the entire protocol stack from software and ensuring deterministic timing without CPU intervention.
How many LCD segments and commons can the R5F2L3A7CNFA#U0 drive simultaneously, and what bias configurations are supported?
The R5F2L3A7CNFA#U0 drives up to 56 segment outputs and 8 common outputs. It supports 1/2, 1/3, and 1/4 bias ratios using its integrated VL1–VL4 regulators, and duty cycles including static, 1/2, 1/3, 1/4, and 1/8 - enabling compatibility with most character and segment-based displays without external bias circuitry.
What is the purpose of the Background Operation (BGO) function in the R5F2L3A7CNFA#U0's data flash, and how is it implemented?
The BGO function in the R5F2L3A7CNFA#U0 allows erase and write operations to the 4 KB data flash memory to proceed concurrently with program execution from main flash. It is implemented via dedicated flash control registers (FENTRY, FSADDR, etc.) and interrupt flags (FRDYI), enabling seamless firmware updates and runtime parameter logging without freezing real-time control tasks.
Which pins on the R5F2L3A7CNFA#U0 are designated for high-current drive, and what is their rated sink/source capability?
The R5F2L3A7CNFA#U0 provides 16 high-current drive pins - specifically P1_0–P1_7, P2_0–P2_7 - each capable of sourcing or sinking up to 20 mA continuously (per Renesas DS R01DS0095EJ0101, Section 22.3). These pins are optimized for direct LED driving or relay coil control without external drivers.
R5F2L3A7CNFA#U0 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Renesas
- Package/Case:
- 100-BQFP
- Series:
- R8C/Lx/3AC
- Packaging:
- Tray
- Product Status:
- Obsolete
- Programmable:
- Not Verified
- Core Processor:
- R8C
- Core Size:
- 16-Bit
- Speed:
- 20MHz
- Connectivity:
- I2C, LINbus, SIO, SSU, UART/USART
- Peripherals:
- LCD, POR, PWM, Voltage Detect, WDT
- Number of I/O:
- 88
- Program Memory Size:
- 48KB (48K x 8)
- Program Memory Type:
- FLASH
- EEPROM Size:
- 4K x 8
- RAM Size:
- 6K x 8
- Voltage - Supply (Vcc/Vdd):
- 1.8V ~ 5.5V
- Data Converters:
- A/D 20x10b; D/A 2x8b
- Oscillator Type:
- Internal
- Operating Temperature:
- -20°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
R5F2L3A7CNFA#U0 FAQ
1.How can I place an order for R5F2L3A7CNFA#U0 through Aetrix?
Please submit a Request for Quotation (RFQ) for R5F2L3A7CNFA#U0 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 R5F2L3A7CNFA#U0 reliable?
The price and inventory of R5F2L3A7CNFA#U0 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for R5F2L3A7CNFA#U0 is usually 5 days.
3.What payment methods are accepted for R5F2L3A7CNFA#U0?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for R5F2L3A7CNFA#U0 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for R5F2L3A7CNFA#U0?
R5F2L3A7CNFA#U0 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your R5F2L3A7CNFA#U0 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 R5F2L3A7CNFA#U0?
For technical support, including R5F2L3A7CNFA#U0 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your R5F2L3A7CNFA#U0 requirements.
6.How does Aetrix verify that R5F2L3A7CNFA#U0 is sourced from the original manufacturer or authorized distributors?
All R5F2L3A7CNFA#U0 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 R5F2L3A7CNFA#U0 meets industry standards.
7.What is the process for return or replacement of R5F2L3A7CNFA#U0?
All R5F2L3A7CNFA#U0 units undergo pre-shipment inspection (PSI). If there is an issue with R5F2L3A7CNFA#U0, 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 R5F2L3A7CNFA#U0 part is unused and in its original packaging.
Return procedure for R5F2L3A7CNFA#U0:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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