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Renesas R5F21346UNFP#V0
- Part No.:
- R5F21346UNFP#V0
- Manufacturer:
- Renesas
- Category:
- Microcontrollers
- Package:
- 48-LQFP
- Datasheet:
-
R5F21346UNFP#V0.pdf
- Description:
- IC MCU 16BIT 32KB FLASH 48LFQFP
- Quantity:
- Payment:
- Shipping:
Inventory:4,234
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Product details
Overview
R5F21346UNFP#V0 from Renesas Electronics is a 16-bit R8C CPU core microcontroller in the R8C/34U Group, featuring 32 KB program ROM, 4 KB RAM, and 4 KB data flash (1 KB × 4 blocks) with background operation (BGO). It supports USB 2.0 Full Speed (12 Mbps) as a peripheral-only function, includes a 10-bit A/D converter (12 channels), and operates across −20°C to +85°C in 48-pin LQFP (PLQP0048KB-A). It targets embedded control in consumer audio, cameras, and office equipment.
For engineers reviewing the R5F21346UNFP#V0 datasheet, R5F21346UNFP#V0 pinout, R5F21346UNFP#V0 application, or R5F21346UNFP#V0 equivalent, key selection criteria include USB peripheral-only capability (no host/OTG), 32 KB flash size, N-grade temperature range, and compatibility with Renesas' R8C toolchain and on-chip debug interface.
Technical Context
The R5F21346UNFP#V0 implements the R8C CPU core with 89 fundamental instructions, 16×16→32-bit hardware 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.
It integrates four clock sources - XIN crystal oscillator, high-speed/low-speed on-chip oscillators, and PLL frequency synthesizer - supporting standard, wait, and stop power modes. USB functionality uses an on-chip transceiver with 448-byte FIFO (DCP + PIPE4–7), enabling control, bulk, and interrupt transfers without external PHY.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| CPU Core | R8C 16-bit core with 89 instructions, 50 ns min instruction time @ 20 MHz |
| Memory | 32 KB program ROM + 4 KB RAM + 4 KB data flash (BGO supported) |
| USB Interface | USB 2.0 Full Speed (12 Mbps) peripheral-only controller with integrated transceiver |
| A/D Converter | 10-bit resolution × 12 channels with sample-and-hold and sweep mode |
| Timers | Timer RA/RB (8-bit), Timer RC/RF (16-bit), plus watchdog timer (14-bit) |
| Operating Range | −20°C to +85°C (N version), VCC = 1.8–5.5 V |
| Package | 48-pin LQFP (PLQP0048KB-A), 7 mm × 7 mm, 0.5 mm pitch |
Pinout & Package
Package: 48-pin LQFP (PLQP0048KB-A), RoHS-compliant, surface-mount, with exposed thermal pad (not electrically connected).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| P0_0–P0_7 | Analog input / I/O port | 12-channel A/D inputs (AN0–AN7) and general-purpose CMOS I/O with selectable pull-up |
| USB_DP / USB_DM | USB differential data | Direct connection to USB bus D+/D−; no external transceiver required |
| USB_VBUS | VBUS detection input | Monitors USB cable insertion status during runtime for plug-and-play control |
| USB_DPUPE | D+ pull-up enable | Controls internal 1.5 kΩ pull-up on D+ to signal USB device enumeration |
| XIN / XOUT | Crystal oscillator interface | Supports external crystal (1–20 MHz) or ceramic resonator for precise timing |
| RESET | Active-low reset input | Hardware reset assertion; compatible with RC-based or supervisor IC reset circuits |
Key Features
| Feature | Design Value |
|---|---|
| Background Operation (BGO) | Enables concurrent code execution while erasing/programming data flash blocks |
| USB Peripheral Controller | Integrated USB 2.0 FS transceiver and 448-byte FIFO eliminate need for external PHY |
| Low-Power Modes | Wait mode (4.0 µA @ 3.0 V) and stop mode (2.0 µA @ 3.0 V) support battery-powered designs |
| On-Chip Debug | Full ICE-capable debug interface via single-wire SWD-like protocol for firmware development |
| EMI/EMS Optimization | Designed with spread-spectrum clocking and noise-resistant I/O to meet industrial EMC requirements |
Applications
| USB-Enabled Consumer Audio | Digital Camera Control Unit |
|---|---|
Use Scenario: Embedded audio system requiring USB-MIDI or USB mass storage class connectivity for firmware updates and media transfer. IC Role / Device Role / Timing Role: USB peripheral controller and real-time sensor/codec interface manager with precise timing for audio sampling clocks. Use Value: Eliminates external USB PHY and reduces BOM count by integrating transceiver, FIFO, and descriptor handling logic. |
Use Scenario: Compact digital camera module needing coordinated control of image sensor, flash, lens actuator, and USB-based image download. IC Role / Device Role / Timing Role: Central system controller managing multi-channel A/D conversion (battery, temperature), PWM-driven focus/zoom, and USB enumeration. Use Value: 12-channel A/D with sample-and-hold enables simultaneous analog monitoring; USB BGO allows firmware update without halting camera operation. |
| Smart Office Equipment | Industrial Human-Machine Interface |
Use Scenario: All-in-one printer/scanner with USB host-to-device bridging for PC communication and peripheral attachment. IC Role / Device Role / Timing Role: USB peripheral endpoint for printer command processing and status reporting; manages parallel/serial interfaces to print engine. Use Value: Dedicated USB interrupt vectors (69 total) and programmable priority levels ensure timely response to host commands under real-time load. |
Use Scenario: Panel-mounted HMI in factory automation requiring robust operation across −20°C to +85°C with ESD-tolerant I/O. IC Role / Device Role / Timing Role: Main controller for touch-key scanning, display backlight PWM, serial comms (UART/I²C), and USB diagnostics port. Use Value: High-current drive ports (36 pins) directly drive LEDs and relays; voltage detection circuit ensures safe brown-out recovery. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microcontroller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| R5F21348UNFP#V0 | 64 KB program ROM, 8 KB RAM, same package and peripheral set | Supports larger firmware images and complex USB descriptors; identical USB peripheral-only capability | Select when firmware exceeds 32 KB or requires extended data buffering |
| R5F21346UDFP#V0 | Same memory configuration but rated for −40°C to +85°C (D grade) | Validated for extended industrial ambient conditions; otherwise functionally identical | Select for deployments in uncontrolled thermal environments such as outdoor kiosks or factory floors |
Compared with R5F21346UNFP#V0, R5F21348UNFP#V0 offers double ROM capacity for feature-rich USB device firmware, while R5F21346UDFP#V0 provides extended temperature qualification-both retain identical pinout, USB peripheral architecture, and debug interface, enabling drop-in replacement where memory or thermal margins are the sole differentiator.
Availability
R5F21346UNFP#V0 is available at Aetrix Electronics and suitable for USB peripheral design, consumer electronics control, and industrial HMI applications requiring stable component supply, long-term lifecycle support, and traceable sourcing.
Supply support for R5F21346UNFP#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 is a global semiconductor leader specializing in microcontrollers, analog, and power solutions for automotive, industrial, and IoT markets.
The R8C/34U Group, including R5F21346UNFP#V0, was designed for cost-sensitive, USB-integrated embedded systems in consumer electronics-emphasizing low-power operation, EMI resilience, and seamless integration with Renesas' e² studio and CS+ development tools.
FAQ
Does R5F21346UNFP#V0 support USB host or OTG functionality?
No. R5F21346UNFP#V0 implements USB 2.0 Full Speed exclusively as a peripheral controller with integrated transceiver and 448-byte FIFO. It lacks USB host controller logic, OTG negotiation circuitry, or ID pin support-unlike R8C/34K Group parts. Host or OTG capability requires migration to R5F21348KNFP#V0 or similar K-series devices.
What is the maximum operating frequency and voltage range for R5F21346UNFP#V0?
R5F21346UNFP#V0 operates up to 20 MHz at VCC = 2.7–5.5 V (USB not used), or 5 MHz at VCC = 1.8–5.5 V (USB not used). The minimum supply voltage is 1.8 V, enabling compatibility with single-cell Li-ion or 3.3 V/5 V system rails. USB operation requires VCC ≥ 2.7 V per Renesas specification R01DS0113EJ0110.
Can R5F21346UNFP#V0 perform in-system programming of its data flash during runtime?
Yes. R5F21346UNFP#V0 supports Background Operation (BGO) for data flash, allowing erase and write operations on one 1 KB block while executing code from another. This enables firmware-over-USB updates, parameter logging, or calibration storage without halting application execution-critical for uninterrupted USB device operation.
Is the R5F21346UNFP#V0 pin-compatible with other R8C/34U or R8C/34K devices?
R5F21346UNFP#V0 shares the PLQP0048KB-A (48-pin LQFP) package and identical pin assignment with all R8C/34U Group parts (e.g., R5F21348UNFP#V0) and R8C/34K Group parts (e.g., R5F21348KNFP#V0). However, USB-related pins differ: R8C/34U lacks USB_ID, USB_OVRCURB, and USB_EXICEN signals present on R8C/34K, making direct substitution invalid for OTG designs.
What debug and programming interfaces does R5F21346UNFP#V0 support?
R5F21346UNFP#V0 supports Renesas' on-chip debug interface using a single-pin SWD-like protocol (via dedicated debug pins), compatible with E2 emulator and CS+ IDE. It also supports on-board flash rewrite via UART or USB bootloader-enabling field firmware updates without dedicated debug hardware. No JTAG interface is implemented.
R5F21346UNFP#V0 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Renesas
- Package/Case:
- 48-LQFP
- Series:
- R8C/3x/34U
- Packaging:
- Tray
- Product Status:
- Obsolete
- Programmable:
- Not Verified
- Core Processor:
- R8C
- Core Size:
- 16-Bit
- Speed:
- 20MHz
- Connectivity:
- I2C, LINbus, SIO, SSU, UART/USART, USB
- Peripherals:
- POR, PWM, Voltage Detect, WDT
- Number of I/O:
- 36
- Program Memory Size:
- 32KB (32K x 8)
- Program Memory Type:
- FLASH
- EEPROM Size:
- 4K x 8
- RAM Size:
- 4K x 8
- Voltage - Supply (Vcc/Vdd):
- 1.8V ~ 5.5V
- Data Converters:
- A/D 12x10b
- Oscillator Type:
- Internal
- Operating Temperature:
- -20°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
R5F21346UNFP#V0 FAQ
1.How can I place an order for R5F21346UNFP#V0 through Aetrix?
Please submit a Request for Quotation (RFQ) for R5F21346UNFP#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 R5F21346UNFP#V0 reliable?
The price and inventory of R5F21346UNFP#V0 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for R5F21346UNFP#V0 is usually 5 days.
3.What payment methods are accepted for R5F21346UNFP#V0?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for R5F21346UNFP#V0 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for R5F21346UNFP#V0?
R5F21346UNFP#V0 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your R5F21346UNFP#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 R5F21346UNFP#V0?
For technical support, including R5F21346UNFP#V0 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your R5F21346UNFP#V0 requirements.
6.How does Aetrix verify that R5F21346UNFP#V0 is sourced from the original manufacturer or authorized distributors?
All R5F21346UNFP#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 R5F21346UNFP#V0 meets industry standards.
7.What is the process for return or replacement of R5F21346UNFP#V0?
All R5F21346UNFP#V0 units undergo pre-shipment inspection (PSI). If there is an issue with R5F21346UNFP#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 R5F21346UNFP#V0 part is unused and in its original packaging.
Return procedure for R5F21346UNFP#V0:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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