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Renesas R5F2L3ACCNFP#31
- Part No.:
- R5F2L3ACCNFP#31
- Manufacturer:
- Renesas
- Category:
- Microcontrollers
- Package:
- 100-LQFP
- Datasheet:
-
R5F2L3ACCNFP#31.pdf
- Description:
- IC MCU 16BIT 128KB FLSH 100LFQFP
- Quantity:
- Payment:
- Shipping:
Inventory:3,501
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Product details
Overview
R5F2L3ACCNFP#31 from Renesas is an 8-bit R8C/L3AC Group microcontroller featuring the R8C CPU core, 128 KB program flash, 10 KB RAM, and integrated LCD drive control supporting up to 8 common and 56 segment outputs. It delivers 50 ns minimum instruction execution at 20 MHz, includes a 16×16-bit hardware multiplier, and targets embedded control in resource-constrained, display-intensive applications such as smart home appliances and industrial HMI panels.
For engineers reviewing the R5F2L3ACCNFP#31 datasheet, R5F2L3ACCNFP#31 pinout, R5F2L3ACCNFP#31 application, or R5F2L3ACCNFP#31 equivalent, key selection criteria include its 100-pin LQFP package, 20-channel 10-bit ADC, dual 8-bit DACs, LIN bus support via UART0 + Timer RA, and background operation (BGO) for data flash reprogramming during runtime.
Technical Context
The R5F2L3ACCNFP#31 implements the R8C CPU core with 89 fundamental instructions and a dedicated 16×16→32-bit multiplier for efficient arithmetic in motor control and sensor processing. Its system clock generation includes four independent circuits: XIN (up to 20 MHz), XCIN (32 kHz), high-speed on-chip oscillator (adjustable), and low-speed on-chip oscillator - enabling flexible power-mode transitions between standard, wait, stop, and power-off modes.
Peripheral integration centers on mixed-signal timing and human interface: Timer RD provides three-phase PWM with complementary output for brushless DC motor drives; Timer RG supports phase counting for encoder interfaces; and the LCD controller integrates voltage multiplier and regulator for bias generation, eliminating external components for static/1/2/1/3/1/4 duty displays.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| CPU Core | R8C 8-bit core with 89 instructions and 16×16-bit hardware multiplier for deterministic math operations |
| Flash / RAM | 128 KB program flash + 1 KB × 4 data flash with BGO; 10 KB RAM for real-time task stacks and buffers |
| ADC / DAC | 10-bit resolution × 20 channels with sample-and-hold and sweep mode; dual 8-bit DACs for analog waveform generation |
| LCD Drive | Supports up to 8 COM and 56 SEG pins; integrated voltage multiplier enables 1/2–1/4 bias without external components |
| Timers | Timer RD (16-bit × 2) with reset-synchronous & complementary PWM for 3-phase motor control; Timer RG (16-bit) with phase-counting mode |
| Communication | UART0/1/2 (I²C-capable), SSU, LIN module (hardware-assisted using UART0 + Timer RA), DTC for autonomous data transfers |
| Power Modes | Wait mode (3.5 µA @ 3 V, 32 kHz), stop mode (2 µA), power-off mode (0.02 µA) for ultra-low-power battery operation |
Pinout & Package
Package: 100-pin LQFP (PLQP0100KB-A), 0.5 mm pitch, 14 × 14 mm body, exposed pad not specified.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| P0_0 to P0_7 | SEG0–SEG7 / AN4–AN9 | Shared LCD segment outputs and analog inputs; enable compact front-panel display with integrated sensing |
| P1_0 to P1_7 | SEG8–SEG15 / AN12–AN15 | Additional segment outputs and ADC channels; extend display area while reusing analog acquisition path |
| P2_0 to P2_7 | SEG16–SEG23 / KI0–KI7 | Segment outputs and key-input interrupt pins; support direct capacitive or mechanical keypad scanning |
| P3_0 to P3_7 | SEG24–SEG31 / INT0–INT7 | Segment outputs with external interrupt capability; allow touch-responsive UI elements with hardware debouncing |
| P4_0 to P4_7 | SEG32–SEG39 / TXD1/RXD1/CLK1/TRCIOx | Segment outputs multiplexed with UART1 and trace I/O; simplify debug and communication without pin trade-offs |
| P6_0 to P6_7 | SEG44–SEG51 / TRDIOA0–TRDIOD1 | Extended segment outputs with timer RD I/O; support large-character or graphical LCD segments with PWM dimming |
| P7_0 to P7_7 | COM0–COM7 / SEG52–SEG55 | Dedicated common outputs and shared segment pins; configure 1/8-duty LCDs or repurpose as GPIO |
| VL1–VL4 | LCD bias supply pins | Connect internal voltage multiplier outputs; set LCD contrast and bias ratio without external resistors |
| CL1 / CL2 | LCD clock inputs | Drive LCD frame rate timing; synchronize display updates with system clock or external source |
| XIN / XOUT | Main crystal oscillator terminals | Support 1–20 MHz crystals for precise timing; required for full-speed CPU operation and UART baud accuracy |
Key Features
| Feature | Design Value |
|---|---|
| Background Operation (BGO) | Enables real-time firmware updates and parameter storage in data flash without halting CPU execution |
| Hardware LIN Module | Offloads LIN protocol framing, checksum, and synchronization from CPU using UART0 and Timer RA |
| Integrated LCD Voltage Multiplier | Generates VL1–VL4 internally; eliminates 3–4 external charge-pump ICs and reduces BOM cost by ~$0.15 |
| High-Current I/O Ports | 16 pins rated for >10 mA sink/source; directly drive LEDs, relays, or LCD backlights without buffer transistors |
| Dual 8-bit DACs | Provide simultaneous analog outputs for audio tone generation, sensor calibration references, or actuator biasing |
Applications
| Smart Appliance Control Panel | Industrial HMI Display Terminal |
|---|---|
Use Scenario: A microwave oven control board requiring LED indicators, rotary encoder input, and 4-digit segmented LCD display with adjustable brightness. IC Role / Device Role / Timing Role: R5F2L3ACCNFP#31 serves as main system controller, managing user input via key-interrupt pins (KI0–KI7), generating PWM-dimmed segment drive signals, and executing cooking logic with real-time clock (Timer RE). Use Value: Integrated LCD bias generation and 56-segment drive eliminate external voltage converters, reducing PCB area by 12 mm² and component count by 4. | Use Scenario: A factory-floor machine status terminal with 8-line × 16-character LCD, pushbutton interface, and RS-485 communication to PLC. IC Role / Device Role / Timing Role: R5F2L3ACCNFP#31 acts as display and I/O concentrator, driving COM/SEG lines, scanning buttons via P2/P3 key-interrupts, and bridging UART2 (I²C mode) to isolated RS-485 transceiver. Use Value: 20-channel ADC monitors panel temperature, power rail voltages, and ambient light for auto-brightness; dual DACs calibrate sensor offsets in-field. |
| Home HVAC Thermostat | Medical Patient Monitor Front-End |
Use Scenario: Battery-powered wall thermostat with 32-segment LCD, thermistor inputs, relay drivers, and IR remote receiver. IC Role / Device Role / Timing Role: R5F2L3ACCNFP#31 functions as low-power system manager, entering stop mode between sensor reads, waking on button press or IR pulse, and updating display via LCD controller with 1/4-bias. Use Value: 2 µA stop-mode current extends CR2032 battery life to >2 years; integrated voltage detection ensures safe brown-out reset at 2.7 V. | Use Scenario: Portable ECG device front-end with OLED-compatible 8-segment status display, lead-off detection, and analog front-end biasing. IC Role / Device Role / Timing Role: R5F2L3ACCNFP#31 provides precision analog signal conditioning (via DACs for electrode bias), digitizes biopotentials using 20-channel ADC with sweep mode, and drives status indicators via P0–P1 segment outputs. Use Value: Sample-and-hold and 10-bit resolution ensure <0.5% gain error across 0–5 V input range; BGO allows firmware updates during clinical use without disconnecting patient. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar 8-bit MCU applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| R5F2L38CCNFP | 80-pin LQFP; 128 KB flash, 10 KB RAM, 16-channel ADC, 48-segment LCD drive | Fewer I/O and LCD pins; suitable for smaller displays and simpler I/O requirements | Select when display size ≤ 48 segments and PCB space constraints favor 80-pin footprint |
| R5F2L36CCNFP | 64-pin LQFP; 128 KB flash, 10 KB RAM, 10-channel ADC, 32-segment LCD drive | Reduced peripheral count: no Timer RG, fewer COM/SEG pins, no CL1/CL2 LCD clocks | Choose for cost-sensitive designs where 32-segment display and basic UART/I²C suffice |
Compared with R5F2L38CCNFP and R5F2L36CCNFP, the R5F2L3ACCNFP#31 provides 24 additional segment outputs, 4 extra COM pins, Timer RG for encoder interfacing, and CL1/CL2 for precise LCD frame-rate control - making it optimal for larger, more interactive displays requiring higher I/O density and advanced timing features.
Availability
R5F2L3ACCNFP#31 is available at Aetrix Electronics and suitable for smart appliance control panels, industrial HMI terminals, and medical front-end devices requiring stable component supply, long-term lifecycle support, and consistent parametric performance across production batches.
Supply support for R5F2L3ACCNFP#31 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 R8C/L3AC Group is designed for cost-effective, display-centric embedded control in consumer and industrial equipment, emphasizing integrated LCD drive, low-power operation, and hardware-accelerated peripherals to minimize external component count.
FAQ
What is the maximum operating frequency and supply voltage range for the R5F2L3ACCNFP#31?
The R5F2L3ACCNFP#31 operates at up to 20 MHz when supplied at 2.7–5.5 V, and supports reduced-frequency operation down to 5 MHz at 1.8 V for ultra-low-voltage applications. Its voltage detection circuit provides programmable reset thresholds and power-on reset functionality across this full range.
Does the R5F2L3ACCNFP#31 support in-system programming and data flash updates during runtime?
Yes, the R5F2L3ACCNFP#31 supports background operation (BGO) for data flash, allowing code or configuration data to be rewritten while the CPU continues executing from program flash. This enables field firmware updates and real-time parameter storage without system interruption.
How many LCD segment and common outputs does the R5F2L3ACCNFP#31 provide, and what bias configurations are supported?
The R5F2L3ACCNFP#31 supports up to 56 segment outputs and 8 common outputs. It integrates a voltage multiplier and regulator to generate VL1–VL4, enabling 1/2, 1/3, and 1/4 bias ratios with static, 1/2, 1/3, 1/4, or 1/8 duty cycles - all without external components.
What communication interfaces are available on the R5F2L3ACCNFP#31, and is hardware LIN support included?
The R5F2L3ACCNFP#31 includes UART0/1/2 (with I²C mode on UART2), synchronous serial unit (SSU), and a dedicated hardware LIN module that uses UART0 and Timer RA for frame generation, checksum calculation, and synchronization - offloading 100% of LIN protocol handling from firmware.
What low-power modes are available on the R5F2L3ACCNFP#31, and what are their typical current consumptions?
The R5F2L3ACCNFP#31 offers wait mode (3.5 µA @ 3 V, 32 kHz), stop mode (2 µA), and power-off mode (0.02 µA). All modes retain RAM content and support wake-up via external interrupt, key input, or RTC alarm - enabling multi-year battery life in portable applications.
R5F2L3ACCNFP#31 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Renesas
- Package/Case:
- 100-LQFP
- Series:
- R8C/Lx/3AC
- Packaging:
- Tray
- Product Status:
- Not For New Designs
- 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:
- 128KB (128K x 8)
- Program Memory Type:
- FLASH
- EEPROM Size:
- 4K x 8
- RAM Size:
- 10K 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:
R5F2L3ACCNFP#31 FAQ
1.How can I place an order for R5F2L3ACCNFP#31 through Aetrix?
Please submit a Request for Quotation (RFQ) for R5F2L3ACCNFP#31 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 R5F2L3ACCNFP#31 reliable?
The price and inventory of R5F2L3ACCNFP#31 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for R5F2L3ACCNFP#31 is usually 5 days.
3.What payment methods are accepted for R5F2L3ACCNFP#31?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for R5F2L3ACCNFP#31 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for R5F2L3ACCNFP#31?
R5F2L3ACCNFP#31 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your R5F2L3ACCNFP#31 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 R5F2L3ACCNFP#31?
For technical support, including R5F2L3ACCNFP#31 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your R5F2L3ACCNFP#31 requirements.
6.How does Aetrix verify that R5F2L3ACCNFP#31 is sourced from the original manufacturer or authorized distributors?
All R5F2L3ACCNFP#31 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 R5F2L3ACCNFP#31 meets industry standards.
7.What is the process for return or replacement of R5F2L3ACCNFP#31?
All R5F2L3ACCNFP#31 units undergo pre-shipment inspection (PSI). If there is an issue with R5F2L3ACCNFP#31, 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 R5F2L3ACCNFP#31 part is unused and in its original packaging.
Return procedure for R5F2L3ACCNFP#31:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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