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Renesas R5F21346MNFP#50
- Part No.:
- R5F21346MNFP#50
- Manufacturer:
- Renesas
- Category:
- Microcontrollers
- Package:
- 48-LQFP
- Datasheet:
-
R5F21346MNFP#50.pdf
- Description:
- IC MCU 16BIT 32KB FLASH 48LFQFP
- Quantity:
- Payment:
- Shipping:
Inventory:2,617
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Product details
Overview
R5F21346MNFP#50 from Renesas Electronics is a 16-bit R8C CPU core microcontroller with 32 KB flash program ROM, 2.5 KB RAM, and 4 KB data flash (1 KB × 4 blocks) supporting background operation (BGO). It operates at up to 20 MHz (VCC = 2.7–5.5 V), features a 16×16→32-bit hardware multiplier, and integrates UART0/1/2, I²C, LIN, 10-bit ADC (12 channels), dual 8-bit DACs, and six timer modules (RA–RE + RD dual-channel) - deployed in consumer audio equipment and office automation systems.
For engineers reviewing the R5F21346MNFP#50 datasheet, R5F21346MNFP#50 pinout, R5F21346MNFP#50 application, or R5F21346MNFP#50 equivalent, key selection considerations include its 48-pin LQFP package (PLQP0048KB-A), -20°C to +85°C operating range (N version), integrated LIN hardware module, BGO-enabled data flash for firmware updates without halting execution, and low-power stop mode (2.0 µA).
Technical Context
The R5F21346MNFP#50 implements the R8C CPU core with 89 fundamental instructions, 1-Mbyte address space, and register bank architecture (two 13-register banks). Its clock system includes four independent sources: XIN (up to 20 MHz), XCIN (32 kHz), high-speed on-chip oscillator (adjustable), and low-speed on-chip oscillator - all selectable via software-controlled prescalers and division ratios (1/2/4/8/16).
Peripheral integration centers on deterministic real-time control: Timer RD provides complementary PWM for three-phase motor drive (6-pin output, triangular/sawtooth modulation), while UART2 supports I²C-bus mode and multiprocessor communication. The DTC (Data Transfer Controller) enables autonomous memory-to-peripheral transfers triggered by 33 sources, reducing CPU load during ADC sweeps or serial streaming.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| CPU Core | R8C 16-bit core with 89 instructions, 1-Mbyte address space, and 16×16→32-bit hardware multiplier for efficient math-intensive firmware. |
| Memory | 32 KB flash program ROM, 2.5 KB RAM, 4 KB data flash (1 KB × 4 blocks) with background operation (BGO) for live firmware patching. |
| Operating Voltage | 1.8–5.5 V supply range; supports 20 MHz operation at ≥2.7 V and 5 MHz down to 1.8 V - enabling single-supply designs across battery and line-powered systems. |
| Peripherals | UART0/1/2 (I²C-capable), LIN hardware module (using Timer RA + UART0), 10-bit ADC (12 channels, sample-and-hold), dual 8-bit DACs, six timers including Timer RD with 6-pin complementary PWM. |
| Power Modes | Standard, wait (3.5 µA @ 3.0 V, 32 kHz XCIN), and stop (2.0 µA @ 3.0 V) modes - optimized for intermittent sensing and ultra-low-power standby in consumer appliances. |
| Package | 48-pin LQFP (PLQP0048KB-A), 7 mm × 7 mm, 0.5 mm pitch - compatible with standard surface-mount assembly and thermal management in compact enclosures. |
| Temperature Range | -20°C to +85°C (N version), qualified for consumer and industrial ambient environments without extended temperature derating. |
Pinout & Package
Package: 48-pin LQFP (PLQP0048KB-A), 7 mm × 7 mm body, 0.5 mm lead pitch, exposed pad not specified.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| P0_0–P0_7 | CMOS I/O port with analog input (AN0–AN7) | Configurable digital I/O or 10-bit ADC inputs; P0_6/P0_7 also serve as DA0/DA1 outputs for dual DAC functionality. |
| P1_0–P1_7 | CMOS I/O port with analog input (AN8–AN11), key interrupt (KI0–KI3), and comparator inputs | Supports touch-key scanning (KI0–KI3), voltage monitoring (IVCMP1/IVCMP3), and ADC channel expansion up to 12 channels. |
| P2_0–P2_7, P3_0–P3_1, P3_3–P3_5, P3_7 | CMOS I/O port with timer I/O (TRCIOA–D, TRDIOA–D), serial interface (RXD/TXD), and I²C (SCL/SDA) | Direct connection to Timer RC/RC capture/compare pins, UART2 I²C-bus pins (SCL2/SDA2), and LIN transceiver signals - enabling hardware-accelerated protocol handling. |
| P4_2–P4_7, P6_0–P6_7 | CMOS I/O, reference voltage (VREF), crystal interfaces (XIN/XOUT, XCIN/XCOUT), reset (RESET), and mode (MODE) | VREF sets ADC/DAC reference; XIN/XOUT and XCIN/XCOUT support external crystals (20 MHz and 32 kHz); RESET enables hardware reset; MODE configures boot mode. |
| VCC/AVCC, VSS/AVSS | Power and ground terminals | Dual power domains: VCC/VSS for digital logic, AVCC/AVSS for analog peripherals - requiring separate decoupling to maintain ADC/DAC accuracy. |
Key Features
| Feature | Design Value |
|---|---|
| Background Operation (BGO) Data Flash | Enables concurrent code execution and data flash reprogramming - critical for field-upgradable firmware in audio DSP or appliance control without system interruption. |
| Hardware LIN Module | Integrated LIN 2.0/2.1 support via Timer RA and UART0 eliminates external LIN transceiver dependency in automotive body electronics and smart appliance sub-systems. |
| Timer RD Complementary PWM | Generates synchronized three-phase waveforms (6-pin output) with dead-time insertion and modulation modes (triangular/sawtooth) - directly driving BLDC motors in fans or pumps. |
| Dual 8-bit DAC Outputs | Provides independent analog voltage generation (DA0/DA1) for sensor biasing, audio tone generation, or closed-loop feedback conditioning without external DAC ICs. |
| Low-Power Stop Mode (2.0 µA) | Retains RAM content and wake-up capability via INTx/KIx while drawing minimal current - ideal for battery-backed real-time clock or sensor alert functions. |
| 10-bit ADC with Sweep Mode | Automatically sequences all 12 analog inputs (AN0–AN11) with configurable sampling rate and trigger sources (ADTRG, timer), reducing firmware overhead in multi-sensor monitoring. |
Applications
| Audio Signal Processing | Office Equipment Control |
|---|---|
|
Use Scenario: Digital audio mixer in USB-powered speaker systems requiring volume leveling, EQ, and analog output. IC Role / Device Role / Timing Role: Main controller executing DSP algorithms, managing USB audio class interface, and generating analog output via dual DACs (DA0/DA1). Use Value: Integrated 10-bit ADC monitors input signal levels for automatic gain control; BGO data flash allows seamless firmware updates during playback. |
Use Scenario: Embedded controller in multifunction printers managing paper feed, toner sensing, and user interface. IC Role / Device Role / Timing Role: System-on-chip managing stepper motor timing (via Timer RD PWM), sensor polling (ADC sweep), and host communication (UART2 I²C mode). Use Value: Hardware LIN module interfaces with toner cartridge ICs; low-power stop mode extends sleep duration between print jobs. |
| Consumer Appliance UI | Industrial Panel Meter |
|
Use Scenario: Touch-sensitive control panel in microwave ovens with LED display and audible feedback. IC Role / Device Role / Timing Role: Front-end processor handling capacitive key scan (KI0–KI3), LED driver timing (high-current I/O ports), and buzzer tone generation (Timer RE). Use Value: Key input interrupts (INT3/INT4) enable immediate response; 43 high-current drive ports eliminate external LED drivers for segment displays. |
Use Scenario: Compact panel meter measuring voltage/current with local display and RS-485 communication. IC Role / Device Role / Timing Role: Data acquisition node performing precision analog measurement (10-bit ADC with sample-and-hold), serial protocol translation (UART0 → RS-485), and real-time clock (Timer RE). Use Value: Dual DACs calibrate sensor offsets; XCIN-based 32 kHz RTC maintains timekeeping accuracy during main power loss. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar 16-bit MCU applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| R5F21346MDFP | Same core, memory, and peripherals but rated for -40°C to +85°C (D version) vs. -20°C to +85°C (N version). | Required for industrial or automotive under-hood applications where extended temperature tolerance is mandatory. | Select R5F21346MDFP when operating ambient exceeds 85°C or requires qualification to AEC-Q100 Grade 3. |
| R5F21345MNFP | 24 KB program ROM, 2 KB RAM, identical peripheral set and package - 8 KB less flash than R5F21346MNFP#50. | Suitable for cost-sensitive designs with smaller firmware footprints, such as basic remote controls or simple sensor nodes. | Choose R5F21345MNFP when application firmware fits within 24 KB and BGO data flash usage is minimal. |
Compared with R5F21346MDFP, the R5F21346MNFP#50 offers identical functionality at lower temperature grade and cost; compared with R5F21345MNFP, it provides 8 KB additional flash and 512 bytes more RAM for complex control algorithms or larger data buffers.
Availability
R5F21346MNFP#50 is available at Aetrix Electronics and suitable for consumer audio equipment, office automation devices, and home appliance control systems requiring stable component supply, long-term lifecycle support, and consistent parametric performance across production batches.
Supply support for R5F21346MNFP#50 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 R8C/34M Group, including R5F21346MNFP#50, was designed for cost-effective, low-power embedded control in consumer electronics - emphasizing integrated peripherals (LIN, ADC, DAC), flash flexibility (BGO), and robust EMI/EMS performance.
FAQ
What is the maximum operating frequency of the R5F21346MNFP#50 and under what voltage conditions?
The R5F21346MNFP#50 achieves a maximum operating frequency of 20 MHz when supplied with VCC = 2.7–5.5 V using the XIN clock source. At reduced supply voltages (1.8–5.5 V), it supports 5 MHz operation - enabling flexible power/performance trade-offs in battery-powered designs without changing the silicon variant.
Does the R5F21346MNFP#50 support in-circuit debugging and flash programming?
Yes, the R5F21346MNFP#50 includes on-chip debug capability and on-board flash rewrite functionality. It supports full-cycle programming and erasure (10,000 cycles for data flash, 1,000 for program ROM) via standard debug interfaces, enabling development, validation, and field firmware updates without external programmers.
How many analog-to-digital converter (ADC) channels does the R5F21346MNFP#50 provide, and what is their resolution?
The R5F21346MNFP#50 integrates a 10-bit resolution ADC with 12 input channels (AN0–AN11). It includes sample-and-hold circuitry and sweep mode for automatic sequential conversion - delivering precise analog measurements for sensor interfacing in appliances and instrumentation.
What peripheral functions are enabled by the hardware LIN module in the R5F21346MNFP#50?
The hardware LIN module in the R5F21346MNFP#50 combines Timer RA and UART0 to implement LIN 2.0/2.1 protocol handling, including automatic sync field detection, checksum calculation, and frame timing - reducing CPU overhead in automotive body control units and smart appliance sub-networks.
Is the R5F21346MNFP#50 pin-compatible with other members of the R8C/34M Group?
Yes, all R8C/34M Group MCUs, including R5F21344MNFP, R5F21345MNFP, and R5F21346MNFP#50, share the identical 48-pin LQFP package (PLQP0048KB-A) and pin assignment. Firmware and PCB layouts are interchangeable across these variants - differing only in flash/RAM capacity and temperature grade.
R5F21346MNFP#50 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Renesas
- Package/Case:
- 48-LQFP
- Series:
- R8C/3x/34M
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Programmable:
- Not Verified
- 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:
R5F21346MNFP#50 FAQ
1.How can I place an order for R5F21346MNFP#50 through Aetrix?
Please submit a Request for Quotation (RFQ) for R5F21346MNFP#50 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 R5F21346MNFP#50 reliable?
The price and inventory of R5F21346MNFP#50 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for R5F21346MNFP#50 is usually 5 days.
3.What payment methods are accepted for R5F21346MNFP#50?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for R5F21346MNFP#50 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for R5F21346MNFP#50?
R5F21346MNFP#50 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your R5F21346MNFP#50 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 R5F21346MNFP#50?
For technical support, including R5F21346MNFP#50 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your R5F21346MNFP#50 requirements.
6.How does Aetrix verify that R5F21346MNFP#50 is sourced from the original manufacturer or authorized distributors?
All R5F21346MNFP#50 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 R5F21346MNFP#50 meets industry standards.
7.What is the process for return or replacement of R5F21346MNFP#50?
All R5F21346MNFP#50 units undergo pre-shipment inspection (PSI). If there is an issue with R5F21346MNFP#50, 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 R5F21346MNFP#50 part is unused and in its original packaging.
Return procedure for R5F21346MNFP#50:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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