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Renesas R5F21346CNFP#10
- Part No.:
- R5F21346CNFP#10
- Manufacturer:
- Renesas
- Category:
- Microcontrollers
- Package:
- 48-LQFP
- Datasheet:
-
R5F21346CNFP#10.pdf
- Description:
- R8C34C MCU 2.7/5.5V 32K 48LQFP -
- Quantity:
- Payment:
- Shipping:
Inventory:1,792
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Product details
Overview
R5F21346CNFP#10 from Renesas Electronics is a 16-bit R8C CPU core microcontroller with 32 KB flash program memory, 2.5 KB RAM, and 4 KB data flash (1 KB × 4 blocks) supporting background operation (BGO). It delivers 50 ns minimum instruction execution at 20 MHz (VCC = 2.7–5.5 V), integrates dual 8-bit timers (RA/RB), dual 16-bit timers (RC/RD), real-time clock (RE), 10-bit × 12-channel ADC, dual 8-bit DACs, LIN hardware module, and I²C/UART/SSU serial interfaces - deployed in consumer audio equipment and office automation control systems.
For engineers reviewing the R5F21346CNFP#10 datasheet, R5F21346CNFP#10 pinout, R5F21346CNFP#10 application, or R5F21346CNFP#10 equivalent, key selection considerations include its -20°C to +85°C operating range (N version), 48-pin LQFP package (PLQP0048KB-A), integrated voltage detection with 3-level reset, low-power wait/stop modes (down to 2.0 µA), and on-chip debug capability for embedded firmware development.
Technical Context
The R5F21346CNFP#10 implements the R8C CPU core with 89 fundamental instructions, 16×16→32-bit multiplier, and multiply-accumulate capability. Its memory map spans 1 Mbyte (00000h–FFFFFh), with fixed interrupt vector table at 0FFDCh–0FFFFh and data flash at 03000h–03FFFh.
Peripheral integration includes UART0/1/2 (with I²C mode on UART2), synchronous serial unit (SSU), hardware LIN using timer RA and UART0, 14-bit watchdog timer with selectable low-speed oscillator source, and DTC with 33 activation sources supporting normal and repeat transfer modes.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| CPU Core | R8C 16-bit core with 89 instructions, 50 ns min. instruction time at 20 MHz |
| Memory | 32 KB program flash, 2.5 KB RAM, 4 KB data flash (1 KB × 4 blocks) with BGO |
| Operating Voltage | 1.8–5.5 V - supports wide-input industrial and battery-powered designs |
| Power Consumption | 6.5 mA typical @ 5.0 V/20 MHz; 2.0 µA in stop mode - enables ultra-low-power sleep states |
| ADC/DAC | 10-bit resolution × 12 channels with sample-and-hold; dual 8-bit DAC outputs (DA0/DA1) |
| Timers | Timer RA/RB (8-bit × 2), RC (16-bit × 1), RD (16-bit × 2), RE (8-bit RTC) with PWM, capture/compare, and waveform generation |
| Serial Interfaces | UART0/1/2 (UART2 supports I²C-bus mode), SSU, LIN hardware module (timer RA + UART0) |
Pinout & Package
48-pin LQFP package (PLQP0048KB-A), 7 mm × 7 mm body, 0.5 mm pitch. Pin functions support multiplexed peripheral assignment via software configuration.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| P0_0–P0_7 | Analog input / DA output / timer I/O | AN0–AN7 inputs; DA0/DA1 outputs; TRCIOx for timer RC; shared with TRCTRG/CLK1 |
| P1_0–P1_7 | General I/O / analog input / key interrupt | AN8–AN11, KI0–KI3, TRAIO, CLK0, RXD0/TXD0 - supports touch-key sensing and serial comms |
| P2_0–P2_7 | Timer RD I/O / external trigger | TRDIOA0–TRDIOD1, TRDCLK - enables 6-pin complementary PWM for motor control |
| P3_3–P3_7 | I²C/SSU/UART2 / interrupt / comparator | SCL2/SDA2, SSI/SSCK/SSO, CTS2/RTS2, IVCMP3/IVREF3 - shared bus resource management |
| XIN/XOUT | High-speed crystal oscillator interface | Supports 20 MHz external crystal; enables precise timing for real-time control loops |
| XCIN/XCOUT | 32 kHz low-power RTC oscillator | Drives Timer RE in real-time clock mode while minimizing standby current |
| RESET | Active-low reset input | Hardware reset assertion; compatible with external supervisor ICs or pushbutton circuits |
| MODE | Boot mode select | Must be pulled high via resistor to enable normal flash execution mode |
Key Features
| Feature | Design Value |
|---|---|
| Background Operation (BGO) | Data flash erase/write during program execution - enables firmware updates without halting system operation |
| Hardware LIN Module | Dedicated LIN 2.0/2.1 support via timer RA and UART0 - eliminates software protocol overhead for automotive body electronics |
| Low-Power Operating Modes | Wait mode (3.5 µA @ 32 kHz XCIN), stop mode (2.0 µA) - extends battery life in portable appliances |
| Voltage Detection Circuit | Configurable 3-level detection (VDD monitor + two selectable thresholds) - ensures safe brown-out reset across supply variations |
| On-Chip Debug Interface | Fully integrated debug circuit with flash rewrite capability - reduces need for external emulators during development |
| Multiplexed Peripheral Pins | Over 40 pins support ≥2 alternate functions (e.g., P0_6 = AN1/DA0/TRCIOD) - maximizes I/O utility in space-constrained PCB layouts |
Applications
| Audio Equipment Control | Office Automation Devices |
|---|---|
Use Scenario: Digital audio mixer with volume leveling, tone adjustment, and display interface. IC Role / Device Role / Timing Role: Main system controller managing ADC sampling, DAC playback, button/key scan, and LCD backlight PWM. Use Value: Integrated 10-bit ADC (12 ch), dual 8-bit DACs, and 16-bit PWM-capable timers eliminate external signal conditioning ICs. |
Use Scenario: Automatic document feeder (ADF) in multifunction printers with paper jam detection and motor sequencing. IC Role / Device Role / Timing Role: Real-time motion controller coordinating stepper motor drive, sensor polling (opto-interrupters), and error reporting via UART. Use Value: Hardware LIN interface enables communication with upstream print engine; Timer RD's complementary PWM drives H-bridge drivers directly. |
| Consumer Appliance UI | Industrial Panel Meters |
Use Scenario: Touch-sensitive front panel for microwave ovens with timer, power level, and safety interlock monitoring. IC Role / Device Role / Timing Role: Human-machine interface processor handling key scan (KI0–KI3), buzzer tone generation (Timer RB), and LED segment drive. Use Value: Dedicated key input interrupts reduce CPU polling overhead; high-current drive ports (43 pins) sink LED segments without external transistors. |
Use Scenario: DIN-rail mounted panel meter measuring AC line voltage/current with isolated RS-485 output. IC Role / Device Role / Timing Role: Signal acquisition and protocol gateway - digitizing analog inputs, computing RMS values, and formatting Modbus RTU frames. Use Value: On-chip voltage reference (VREF pin) stabilizes ADC measurements; UART2 I²C mode supports isolated level-shifter configuration. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar 16-bit MCU applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| R5F21346CDFP | Same core, memory, and peripherals; rated for -40°C to +85°C industrial temperature range | Required for outdoor or uncontrolled-ambient deployments where extended thermal stability is critical | Select when operating ambient exceeds 85°C or requires automotive-grade reliability validation |
| R5F21345CNFP | 24 KB program ROM, 2 KB RAM, identical package and peripheral set - reduced memory footprint | Suitable for cost-sensitive designs with smaller firmware image and less runtime data storage | Choose when application code size remains under 24 KB and avoids data flash block fragmentation risks |
Compared with R5F21346CNFP#10, the R5F21346CDFP offers broader temperature tolerance without altering pinout or firmware compatibility, while R5F21345CNFP provides memory scaling for lower-cost production without sacrificing peripheral functionality or debug capability.
Availability
R5F21346CNFP#10 is available at Aetrix Electronics and suitable for audio equipment control, office automation devices, consumer appliance UI, and industrial panel meters requiring stable component supply across long-lifecycle manufacturing programs.
Supply support for R5F21346CNFP#10 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/34C Group, including R5F21346CNFP#10, was designed for cost-effective, low-power embedded control in consumer electronics - emphasizing EMI/EMS robustness, integrated analog peripherals, and simplified firmware development.
FAQ
What is the maximum operating frequency of the R5F21346CNFP#10?
The R5F21346CNFP#10 supports a maximum external crystal frequency of 20 MHz at VCC = 2.7–5.5 V, achieving a minimum instruction execution time of 50 ns. At lower supply voltages (1.8 V), the maximum frequency reduces to 5 MHz with 200 ns instruction time - ensuring reliable operation across wide-input power domains.
Does the R5F21346CNFP#10 support in-system programming via its serial interfaces?
Yes, the R5F21346CNFP#10 supports on-board flash rewrite through its on-chip debug interface. While UART0/1/2 can be used for host communication, actual flash programming requires the dedicated debug port (not standard UART bootloader); Renesas Flash Development Toolkit (FDT) is the validated toolchain for field firmware updates.
How many independent PWM outputs does the R5F21346CNFP#10 provide?
The R5F21346CNFP#10 provides up to 11 independent PWM outputs: Timer RB offers programmable waveform generation (1 channel), Timer RC supports PWM mode (3 pins), and Timer RD delivers PWM mode (6 pins), reset-synchronous PWM (6 pins), complementary PWM (6 pins), and PWM3 mode (2 pins) - with functional overlap enabling concurrent multi-phase motor control.
Is the data flash memory in the R5F21346CNFP#10 capable of wear leveling?
No, the R5F21346CNFP#10 data flash (1 KB × 4 blocks) does not implement hardware wear leveling. Endurance is rated at 10,000 write/erase cycles per block. Firmware must manage block rotation and erase scheduling - for example, using one block for active logging and others for backup - to extend effective lifetime beyond 10,000 cycles.
What is the function of the MODE pin on the R5F21346CNFP#10?
The MODE pin on the R5F21346CNFP#10 selects boot mode: it must be externally pulled high (to VCC via resistor) to enter normal flash execution mode. Leaving MODE floating or pulling low places the device in test/debug mode - preventing unintended entry into ISP or ROM-based bootloader sequences during power-up.
R5F21346CNFP#10 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Renesas
- Package/Case:
- 48-LQFP
- Series:
- R8C/3x/34C
- Packaging:
- Tray
- Product Status:
- Active
- Programmable:
- -
- Core Processor:
- R8C
- Core Size:
- 16-Bit
- Speed:
- 20MHz
- Connectivity:
- I2C, LINbus, SIO, SSU, UART/USART
- Peripherals:
- POR, PWM, Voltage Detect, WDT
- Number of I/O:
- 43
- Program Memory Size:
- 32KB (32K x 8)
- Program Memory Type:
- FLASH
- EEPROM Size:
- 4K x 8
- RAM Size:
- 2.5K x 8
- Voltage - Supply (Vcc/Vdd):
- 1.8V ~ 5.5V
- Data Converters:
- A/D 12x10b; D/A 2x8b
- Oscillator Type:
- Internal
- Operating Temperature:
- -20°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
R5F21346CNFP#10 FAQ
1.How can I place an order for R5F21346CNFP#10 through Aetrix?
Please submit a Request for Quotation (RFQ) for R5F21346CNFP#10 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 R5F21346CNFP#10 reliable?
The price and inventory of R5F21346CNFP#10 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for R5F21346CNFP#10 is usually 5 days.
3.What payment methods are accepted for R5F21346CNFP#10?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for R5F21346CNFP#10 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for R5F21346CNFP#10?
R5F21346CNFP#10 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your R5F21346CNFP#10 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 R5F21346CNFP#10?
For technical support, including R5F21346CNFP#10 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your R5F21346CNFP#10 requirements.
6.How does Aetrix verify that R5F21346CNFP#10 is sourced from the original manufacturer or authorized distributors?
All R5F21346CNFP#10 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 R5F21346CNFP#10 meets industry standards.
7.What is the process for return or replacement of R5F21346CNFP#10?
All R5F21346CNFP#10 units undergo pre-shipment inspection (PSI). If there is an issue with R5F21346CNFP#10, 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 R5F21346CNFP#10 part is unused and in its original packaging.
Return procedure for R5F21346CNFP#10:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
R5F21346CNFP#10 Tags
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