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Renesas R5F21334GKFP#V0
- Part No.:
- R5F21334GKFP#V0
- Manufacturer:
- Renesas
- Category:
- Microcontrollers
- Package:
- 32-LQFP
- Datasheet:
-
R5F21334GKFP#V0.pdf
- Description:
- IC MCU 16BIT 16KB FLASH 32LQFP
- Quantity:
- Payment:
- Shipping:
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Product details
Overview
R5F21334GKFP#V0 from Renesas Electronics is a 16-bit R8C/33G Group microcontroller featuring 32 KB on-chip flash memory, 2.5 KB RAM, and integrated peripherals including UART0/UART2, I2C-compatible SSU, 16-bit timer RA/RB/RC/RD, and voltage monitor circuits. It operates at up to 20 MHz with supply voltage range 2.7–5.5 V and targets embedded control in industrial sensors and appliance motor interfaces.
For engineers reviewing the R5F21334GKFP#V0 datasheet, R5F21334GKFP#V0 pinout, R5F21334GKFP#V0 application, or R5F21334GKFP#V0 equivalent, key selection criteria include its 48-pin LQFP package, on-chip high-speed oscillator (up to 20 MHz), dual UART support with pin-selectable functions, and voltage detection thresholds configurable for brown-out protection in cost-sensitive 8/16-bit replacement designs.
Technical Context
The R5F21334GKFP#V0 implements the R8C CPU core with 16-bit ALU, 4 general-purpose data registers (R0–R3), and 2 address registers (A0/A1). It supports multiple clock sources: external crystal/resonator (1–20 MHz), ceramic resonator (1–10 MHz), or internal high-speed on-chip oscillator (1–20 MHz) with ±2% accuracy at 25°C.
Reset architecture includes hardware reset, power-on reset, voltage monitor 0 reset (Vdet0), watchdog timer reset, and software reset. The device integrates three independent voltage monitor circuits (Vdet0/Vdet1/Vdet2) with programmable threshold levels and interrupt capability for Vdet1/Vdet2, enabling robust supply supervision in unattended systems.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| CPU Core | R8C 16-bit CISC core with 4 data registers, 2 address registers, and 16-level stack |
| Flash Memory | 32 KB on-chip flash with 100,000 write/erase cycles and 10-year data retention |
| RAM Size | 2.5 KB on-chip RAM, accessible in single-cycle read/write |
| Max Operating Frequency | 20 MHz system clock via internal high-speed oscillator or external source |
| Supply Voltage Range | 2.7 V to 5.5 V - supports direct interface with 3.3 V and 5 V logic domains |
| Operating Temperature | −40°C to +85°C - qualified for industrial environment deployment |
| I/O Pins | 39 CMOS bidirectional I/O pins with individually configurable pull-up, input threshold, and function multiplexing |
Pinout & Package
Package: 48-pin LQFP (7 mm × 7 mm, 0.5 mm pitch), RoHS-compliant, moisture sensitivity level 3.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VCC | Main power supply | Primary 2.7–5.5 V supply for core and I/O; requires local 0.1 µF decoupling |
| VSS | GND reference | Dedicated analog/digital ground return; must be low-impedance connection |
| P1_0–P1_7 | Port 1 I/O | 8-bit bidirectional port with individual direction control and optional pull-up |
| P3_0–P3_7 | Port 3 I/O | 8-bit port supporting UART0 TX/RX, INT0–INT3, and timer RA input capture |
| P4_0–P4_7 | Port 4 I/O | 8-bit port with UART2 TX/RX, SSU clock/data, and timer RB/RC output compare |
| P5_0–P5_7 | Port 5 I/O | 8-bit port supporting timer RD PWM output, voltage monitor inputs, and external interrupt sources |
| RESET | Active-low reset input | Asynchronous external reset; internal pull-up enabled by default |
| CLKI | External clock input | Accepts crystal, resonator, or external clock signal (1–20 MHz) |
| CLKO | Clock output | Outputs system clock or sub-clock for trace/debug or peripheral synchronization |
Key Features
| Feature | Design Value |
|---|---|
| On-chip high-speed oscillator | Configurable 1–20 MHz output with ±2% accuracy at 25°C - eliminates need for external crystal in many applications |
| Flexible UART routing | UART0 and UART2 signals assignable to multiple pin combinations via U0SR/U2SR0/U2SR1 registers - simplifies PCB layout reuse |
| Voltage monitoring | Three independent voltage detectors (Vdet0/Vdet1/Vdet2) with user-selectable thresholds and interrupt generation - enables multi-level brown-out response |
| Timer subsystem | Four 16-bit timers (RA/RB/RC/RD) supporting input capture, output compare, PWM, and interval timing - supports motor control and sensor sampling |
| I/O configuration flexibility | Per-pin control of direction, pull-up enable, input threshold (TTL/CMOS), and alternate function selection - reduces external biasing components |
Applications
| Industrial Sensor Node | Home Appliance Motor Control |
|---|---|
Use Scenario: Standalone temperature/humidity sensor node with RS-485 interface and local fault logging. IC Role / Device Role / Timing Role: Main system controller managing ADC sampling, UART communication, EEPROM write, and supply monitoring. Use Value: Integrated voltage monitors (Vdet0/Vdet1) provide autonomous brown-out recovery without external supervisor IC; 32 KB flash stores firmware and calibration data. | Use Scenario: Fan speed regulation and overcurrent protection in HVAC blower unit. IC Role / Device Role / Timing Role: Real-time motor commutation controller using timer RC PWM outputs and P5_0–P5_3 for gate driver enable signals. Use Value: Four 16-bit timers allow simultaneous PWM generation, current-sense pulse timing, and watchdog supervision - no external timing IC required. |
| Smart Meter Communication Module | Factory Automation I/O Terminal |
Use Scenario: PLC-to-microgrid gateway handling Modbus RTU over UART2 and local status LED control. IC Role / Device Role / Timing Role: Protocol bridge MCU with UART framing, CRC calculation, and GPIO-driven indicator management. Use Value: Pin-selectable UART2 mapping (U2SR0/U2SR1) allows shared PCB footprint across meter variants; 2.7–5.5 V operation tolerates wide input rail fluctuations. | Use Scenario: DIN-rail mounted digital I/O module converting 24 V DC field signals to isolated CAN bus messages. IC Role / Device Role / Timing Role: Signal conditioning and protocol translation engine interfacing optocoupled inputs with external CAN controller. Use Value: 39 configurable I/O pins support mixed 5 V/24 V level translation; internal oscillator ensures reliable boot before CAN transceiver initialization. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar 16-bit microcontroller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| R5F21335GKFP#V0 | Same R8C/33G family; 48 KB flash, 3.5 KB RAM, identical pinout and peripheral set | Higher memory capacity supports larger protocol stacks (e.g., full Modbus TCP offload) | Select when firmware size exceeds 32 KB or additional RAM is needed for buffering |
| R5F21332GKFP#V0 | Same package and core; 16 KB flash, 1.5 KB RAM, reduced peripheral count (no UART2) | Suitable for simpler control tasks where single UART suffices and BOM cost is critical | Choose for cost-optimized designs with minimal peripheral requirements and <20 KB code size |
Compared with R5F21334GKFP#V0, the R5F21335GKFP#V0 offers scalable memory headroom while maintaining full hardware compatibility, whereas the R5F21332GKFP#V0 reduces cost and power at the expense of communication flexibility and firmware capacity.
Availability
R5F21334GKFP#V0 is available at Aetrix Electronics and suitable for industrial sensor nodes, home appliance motor controllers, smart meter communication modules, and factory automation I/O terminals requiring stable component supply across extended production lifecycles.
Supply support for R5F21334GKFP#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 Corporation is a global semiconductor manufacturer headquartered in Japan, specializing in microcontrollers, analog, power, and SoC solutions for industrial, automotive, and infrastructure markets.
The R8C/33G Group, including the R5F21334GKFP#V0, was designed for cost-sensitive, low-power embedded control applications requiring high integration, flexible clocking, and robust voltage supervision - especially in white goods and industrial sensing.
FAQ
What is the maximum system clock frequency supported by the R5F21334GKFP#V0?
The R5F21334GKFP#V0 supports a maximum system clock frequency of 20 MHz. This can be achieved using either the internal high-speed on-chip oscillator (configured via FRA0/FRA7 registers) or an external crystal/resonator connected to CLKI/CLKO pins. Operation above 20 MHz is not permitted and may cause undefined behavior or permanent damage to the R5F21334GKFP#V0.
Does the R5F21334GKFP#V0 include a hardware debug interface?
No, the R5F21334GKFP#V0 does not integrate a dedicated debug interface such as JTAG or SWD. Debugging is supported via the single-wire debug (SWD) channel using the RESET pin in conjunction with the on-chip ROM bootloader. Full real-time tracing or complex breakpoint management requires external tools compatible with Renesas' E8/E8a emulators, which interface through the same RESET and CLKI pins used during normal R5F21334GKFP#V0 operation.
Can the R5F21334GKFP#V0 operate from a 3.3 V supply without level-shifting external peripherals?
Yes, the R5F21334GKFP#V0 operates across 2.7–5.5 V, making 3.3 V a fully supported supply voltage. Its I/O pins are 5 V-tolerant when configured as inputs, and output high-level voltage (VOH) meets 0.8 × VCC minimum at IOL = 4 mA - ensuring direct interoperability with standard 3.3 V logic families without external level shifters. This applies to all 39 I/O pins on the R5F21334GKFP#V0 in standard push-pull mode.
How many UART interfaces does the R5F21334GKFP#V0 support, and are they pin-multiplexed?
The R5F21334GKFP#V0 supports two independent UART channels: UART0 and UART2. Both are fully pin-multiplexed - UART0 signals can be assigned to P3_0/P3_1 or P4_0/P4_1 via the U0SR register, and UART2 signals can be routed to four different pin pairs (e.g., P4_2/P4_3 or P5_4/P5_5) using U2SR0 and U2SR1. This flexibility allows shared PCB layouts across product variants without redesigning the R5F21334GKFP#V0 footprint.
Is the R5F21334GKFP#V0 qualified for automotive applications?
No, the R5F21334GKFP#V0 is rated for Standard quality grade per Renesas' classification and is intended for industrial, consumer, and office equipment - not automotive or safety-critical systems. It lacks AEC-Q100 qualification, extended temperature range (−40°C to +125°C), and automotive-specific failure-in-time (FIT) data. For automotive use, Renesas recommends the RL78/F1x or RH850 families instead of the R5F21334GKFP#V0.
R5F21334GKFP#V0 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Renesas
- Package/Case:
- 32-LQFP
- Series:
- R8C/3x/33G
- 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:
- POR, PWM, Voltage Detect, WDT
- Number of I/O:
- 27
- Program Memory Size:
- 16KB (16K x 8)
- Program Memory Type:
- FLASH
- EEPROM Size:
- 4K x 8
- RAM Size:
- 1.5K x 8
- Voltage - Supply (Vcc/Vdd):
- 2.7V ~ 5.5V
- Data Converters:
- A/D 12x10b; D/A 2x8b
- Oscillator Type:
- Internal
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
R5F21334GKFP#V0 FAQ
1.How can I place an order for R5F21334GKFP#V0 through Aetrix?
Please submit a Request for Quotation (RFQ) for R5F21334GKFP#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 R5F21334GKFP#V0 reliable?
The price and inventory of R5F21334GKFP#V0 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for R5F21334GKFP#V0 is usually 5 days.
3.What payment methods are accepted for R5F21334GKFP#V0?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for R5F21334GKFP#V0 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for R5F21334GKFP#V0?
R5F21334GKFP#V0 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your R5F21334GKFP#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 R5F21334GKFP#V0?
For technical support, including R5F21334GKFP#V0 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your R5F21334GKFP#V0 requirements.
6.How does Aetrix verify that R5F21334GKFP#V0 is sourced from the original manufacturer or authorized distributors?
All R5F21334GKFP#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 R5F21334GKFP#V0 meets industry standards.
7.What is the process for return or replacement of R5F21334GKFP#V0?
All R5F21334GKFP#V0 units undergo pre-shipment inspection (PSI). If there is an issue with R5F21334GKFP#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 R5F21334GKFP#V0 part is unused and in its original packaging.
Return procedure for R5F21334GKFP#V0:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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