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Home > Products > Integrated Circuits (ICs) > Embedded > Microcontrollers

Renesas R5F21134DFP#U0

Name: R5F21134DFP#U0
Brand: Renesas
SKU: R5F21134DFP#U0
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: R5F21134DFP#U0

Manufacturer:: Renesas

Category:: Microcontrollers

Package:: 32-LQFP

Datasheet:: R5F21134DFP#U0.pdf

Description:: IC MCU 16BIT 16KB FLASH 32LQFP

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Product details

Overview

R5F21134DFP#U0 from Renesas Electronics is a 16-bit R8C/Tiny Series microcontroller in 32-pin LQFP (PLQP0032GB-A), operating from −40°C to +85°C with 16 KB flash program ROM, 1 KB RAM, and dual 2 KB data flash blocks. It integrates an 8-bit ×3 timer group, 16-bit timer C, 10-bit 12-channel ADC, dual UART/serial interfaces, and on-chip high-speed/low-speed oscillators - deployed in industrial sensor nodes and home appliance control systems.

For engineers reviewing the R5F21134DFP#U0 datasheet, R5F21134DFP#U0 pinout, R5F21134DFP#U0 application, or R5F21134DFP#U0 equivalent, key selection criteria include its −40°C to +85°C D-version qualification, 16 KB flash with dual data flash blocks for firmware/data storage, 12-channel ADC resolution and sampling rate, UART timing accuracy under internal clock, and I/O drive capability for LED and keypad interfaces.

Technical Context

The R5F21134DFP#U0 implements the R8C/Tiny CPU core with 89 basic instructions and executes at 50 ns minimum instruction time (20 MHz XIN, 3.0–5.5 V). Its memory map spans 1 MB address space, with fixed interrupt vectors at 0FFDC₁₆–0FFFF₁₆, program ROM starting at 0C000₁₆, and data flash at 02000₁₆–02FFF₁₆.

Peripheral integration includes two independent serial channels (UART + clock-synchronous), three 8-bit timers (X/Y/Z) with prescalers, one 16-bit timer C with input capture/output compare, and a watchdog timer with 15-bit counter and selectable reset start function - all controlled via dedicated SFRs mapped in 00000₁₆–002FF₁₆ address range.

Key Specifications

Parameter	Value and Actual Design Meaning
CPU Core	R8C/Tiny 16-bit, 89 instructions, 50 ns min. execution (20 MHz)
Flash Memory	16 KB program ROM + 2 × 2 KB data flash blocks for field-upgradable code and nonvolatile parameter storage
RAM	1 KB on-chip SRAM for stack, variables, and interrupt context preservation
ADC	10-bit resolution, 12 analog inputs (AN0–AN11), usable with internal reference (VREF = VCC)
Timers	Three 8-bit timers (X/Y/Z) + one 16-bit timer C with input capture/output compare capability
Serial Interfaces	Dual channels: UART0 (RxD0/TxD0) + UART1/clock-sync (RxD1/TxD10/TxD11/CLK0)
Operating Temp	−40°C to +85°C (D-version), qualified for industrial and housing equipment applications
Supply Voltage	2.7–5.5 V - supports direct battery (3 V) or regulated 5 V operation without level-shifting

Pinout & Package

Package: 32-pin plastic LQFP (PLQP0032GB-A, JEDEC MO-220 variant), 7 mm × 7 mm body, 0.8 mm pitch, exposed pad not specified.

Pin/Terminal	Circuit Role	Design Meaning
VCC / VSS	Power supply / ground	Dual VCC pins (pins 3, 20) and dual VSS pins (pins 4, 21) enable low-noise power distribution for analog/digital domains
AVCC / AVSS	Analog power supply	Separate analog rail (pins 29, 30) decoupled via 0.1 µF capacitor - critical for 10-bit ADC accuracy
XIN / XOUT	Main clock oscillator I/O	Supports ceramic resonator or crystal (1–20 MHz); external clock may be injected into XIN only
RESET	Active-low reset input	Pulled low via resistor to VSS; internal pull-up not enabled - requires external RC network for reliable power-on reset
P00–P07	8-bit bidirectional port	Configurable as GPIO or analog inputs AN0–AN7; P00 also serves as TxD11 - shared function requires software mux control
P10–P17	8-bit bidirectional port	LED drive capable (sink/source up to 20 mA); also support KI0–KI3 key interrupt and AN8–AN11
P30–P33, P37	Peripheral I/O	P30: CNT R0/CM P10; P31: T ZOUT/CM P11; P32: CNT R1/CM P12; P37: TxD10/RxD1 - multiplexed for timer/compare/serial use
INT0–INT3	External interrupt inputs	Edge-triggered (INT0–INT3 on P45, P17, P31, P32); INT0 filter register (INT0F) enables noise suppression

Key Features

Feature	Design Value
Dual data flash blocks	2 KB × 2 independently erasable sectors enable safe firmware updates and parameter logging without halting main program execution
On-chip oscillator tuning	High-speed on-chip oscillator frequency adjustable via HR0/HR1 registers - eliminates need for external crystal in cost-sensitive designs
LED drive ports	P10–P17 provide direct LED sink/source (20 mA typical) with programmable current control - reduces BOM count in display/keypad subsystems
Oscillation stop detection	Dedicated circuit monitors XIN/XOUT activity and triggers interrupt/reset - essential for fail-safe operation in unattended equipment
Voltage detection circuit	Configurable threshold (VCR1/VCR2) generates interrupt on brown-out - allows graceful shutdown or data save before power loss
Wait/Stop low-power modes	35 µA (Wait, peripheral clocks halted) and 0.7 µA (Stop) currents extend battery life in portable sensor nodes

Applications

Smart Home Sensor Hub	Industrial Panel Controller
Use Scenario: Central node aggregating temperature, humidity, and motion data from multiple sensors, transmitting via UART to gateway. IC Role / Device Role / Timing Role: Main controller executing sensor polling, ADC conversion, data formatting, and UART transmission using Timer Z for precise sampling intervals. Use Value: Integrated 12-channel ADC and dual UART eliminate external signal conditioning and interface ICs; −40°C to +85°C rating ensures reliability in attic or basement installations.	Use Scenario: Local HMI controller managing relay outputs, button inputs, and status LEDs on factory floor panels. IC Role / Device Role / Timing Role: Real-time I/O handler with P10–P17 driving LEDs directly and INT0–INT3 capturing pushbutton events with hardware debouncing. Use Value: On-chip LED drive capability reduces external driver count; voltage detection and watchdog ensure safe recovery from power glitches common in industrial environments.
Appliance Motor Control	Office Equipment Power Manager
Use Scenario: Fan speed regulation and thermal monitoring in air purifiers or HVAC units using PWM and temperature feedback. IC Role / Device Role / Timing Role: Timer C generates variable-duty-cycle PWM for fan control; ADC reads thermistor voltage; UART reports status to main MCU. Use Value: 16-bit timer C provides fine-grained PWM resolution (0.1% steps at 25 kHz); data flash stores calibration coefficients across power cycles.	Use Scenario: Standby power supervisor in multifunction printers, managing sleep/wake transitions and USB wake detection. IC Role / Device Role / Timing Role: Low-power monitor in Stop mode, awakened by INT0 (USB activity) or voltage drop; resumes full operation via RESET vector. Use Value: 0.7 µA Stop mode current meets Energy Star requirements; built-in power-on reset and brown-out detection replace discrete supervisor ICs.

Smart Home Sensor Hub

Industrial Panel Controller

Use Scenario: Central node aggregating temperature, humidity, and motion data from multiple sensors, transmitting via UART to gateway.

IC Role / Device Role / Timing Role: Main controller executing sensor polling, ADC conversion, data formatting, and UART transmission using Timer Z for precise sampling intervals.

Use Value: Integrated 12-channel ADC and dual UART eliminate external signal conditioning and interface ICs; −40°C to +85°C rating ensures reliability in attic or basement installations.

Use Scenario: Local HMI controller managing relay outputs, button inputs, and status LEDs on factory floor panels.

IC Role / Device Role / Timing Role: Real-time I/O handler with P10–P17 driving LEDs directly and INT0–INT3 capturing pushbutton events with hardware debouncing.

Use Value: On-chip LED drive capability reduces external driver count; voltage detection and watchdog ensure safe recovery from power glitches common in industrial environments.

Appliance Motor Control

Office Equipment Power Manager

Use Scenario: Fan speed regulation and thermal monitoring in air purifiers or HVAC units using PWM and temperature feedback.

IC Role / Device Role / Timing Role: Timer C generates variable-duty-cycle PWM for fan control; ADC reads thermistor voltage; UART reports status to main MCU.

Use Value: 16-bit timer C provides fine-grained PWM resolution (0.1% steps at 25 kHz); data flash stores calibration coefficients across power cycles.

Use Scenario: Standby power supervisor in multifunction printers, managing sleep/wake transitions and USB wake detection.

IC Role / Device Role / Timing Role: Low-power monitor in Stop mode, awakened by INT0 (USB activity) or voltage drop; resumes full operation via RESET vector.

Use Value: 0.7 µA Stop mode current meets Energy Star requirements; built-in power-on reset and brown-out detection replace discrete supervisor ICs.

Equivalent & Alternatives

The following parts are listed as comparable options for similar 16-bit microcontroller applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
R5F21134FP#U0	Same core, flash, and peripherals but rated for −20°C to +85°C (non-D version); lacks extended temperature qualification	Suitable for indoor consumer appliances where ambient extremes are not expected	Select R5F21134FP#U0 only if operating environment stays above −20°C; otherwise R5F21134DFP#U0 is required for industrial/housing use cases
R5F21133DFP#U0	12 KB program ROM (vs. 16 KB), identical RAM, data flash, peripherals, and temperature rating	Fits simpler control tasks with smaller firmware footprints - e.g., single-sensor thermostats or basic lighting controllers	Choose R5F21133DFP#U0 when firmware size is ≤12 KB and no future feature expansion is planned; preserves PCB layout compatibility

Compared with R5F21134FP#U0, the R5F21134DFP#U0 adds guaranteed operation down to −40°C and matches R5F21133DFP#U0's industrial temp grade while providing +4 KB flash for complex algorithms or OTA update partitions - making it the optimal choice for ruggedized embedded control where firmware headroom and environmental resilience are both critical.

Availability

R5F21134DFP#U0 is available at Aetrix Electronics and suitable for industrial sensor nodes, smart home hubs, and appliance motor control requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for R5F21134DFP#U0 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 formed in 2010 through the merger of NEC Electronics and Renesas Technology, specializing in microcontrollers, analog, and power devices.

The R8C/13 Group, including R5F21134DFP#U0, was designed for cost-sensitive, low-power embedded control in household appliances, office equipment, and industrial sensors - emphasizing integrated peripherals, wide temperature operation, and flash-based field upgradeability.

FAQ

What is the maximum operating frequency supported by the R5F21134DFP#U0?

The R5F21134DFP#U0 supports a maximum external clock frequency of 20 MHz on the XIN pin, enabling a minimum instruction execution time of 50 ns at VCC = 3.0–5.5 V. When using the internal high-speed oscillator, frequency adjustment is possible via HR0/HR1 registers, though absolute accuracy depends on process and temperature variation - external crystal remains recommended for timing-critical UART or ADC sampling.

Does the R5F21134DFP#U0 support in-circuit debugging?

Yes, the R5F21134DFP#U0 supports on-chip debugging via dedicated pins (P00/AN7/TxD11 and P37/TxD10/RxD1), but these pins must be reserved exclusively for debugger use and cannot simultaneously serve their alternate functions. The MODE pin (pin 31) configures debug entry mode, and IVcc (pin 28) requires separate 0.1 µF decoupling to VSS - not connection to VCC - to stabilize internal debug logic voltage.

How is the data flash memory organized and accessed in the R5F21134DFP#U0?

The R5F21134DFP#U0 contains two independent 2 KB data flash blocks (Block A: 02000₁₆–027FF₁₆; Block B: 02800₁₆–02FFF₁₆) accessible via FLMOD and FLWE bits in the protection register (PRCR). Programming requires VCC = 2.7–5.5 V and execution of specific command sequences; each block endures 10,000 erase/write cycles and retains data for 20 years at 85°C - enabling robust parameter storage and firmware patching without external EEPROM.

What are the key differences between the R5F21134DFP#U0 and R5F21134FP#U0?

The R5F21134DFP#U0 and R5F21134FP#U0 share identical core, memory, and peripheral specifications, differing only in operating ambient temperature range: R5F21134DFP#U0 is qualified for −40°C to +85°C (D-version), while R5F21134FP#U0 operates from −20°C to +85°C. This distinction affects industrial deployment eligibility - R5F21134DFP#U0 is mandatory for outdoor, automotive-adjacent, or uncontrolled-environment applications per Renesas quality grading.

Can the R5F21134DFP#U0 generate precise PWM signals for motor control?

Yes, the R5F21134DFP#U0 can generate precise PWM using Timer C (16-bit) in output compare mode, supporting variable frequency and duty cycle with resolution up to 1 part in 65,536. For fan or pump control, Timer C's TCIN input allows synchronization to external tachometer feedback, while its interrupt flag (TCIF) enables real-time duty adjustment - all without CPU intervention once configured via TCCR and TCORA registers.

R5F21134DFP#U0 Specifications

Product attributes: Attribute value

Manufacturer:: Renesas

Package/Case:: 32-LQFP

Series:: R8C/1x/13

Packaging:: Tray

Product Status:: Obsolete

Programmable:: Not Verified

Core Processor:: R8C

Core Size:: 16-Bit

Speed:: 20MHz

Connectivity:: SIO, UART/USART

Peripherals:: LED, POR, Voltage Detect, WDT

Number of I/O:: 22

Program Memory Size:: 16KB (16K x 8)

Program Memory Type:: FLASH

EEPROM Size:: 4K x 8

RAM Size:: 1K x 8

Voltage - Supply (Vcc/Vdd):: 2.7V ~ 5.5V

Data Converters:: A/D 12x10b

Oscillator Type:: Internal

Operating Temperature:: -40°C ~ 85°C (TA)

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:

R5F21134DFP#U0 FAQ

1.How can I place an order for R5F21134DFP#U0 through Aetrix?

Please submit a Request for Quotation (RFQ) for R5F21134DFP#U0 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 R5F21134DFP#U0 reliable?

The price and inventory of R5F21134DFP#U0 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for R5F21134DFP#U0 is usually 5 days.

3.What payment methods are accepted for R5F21134DFP#U0?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for R5F21134DFP#U0 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for R5F21134DFP#U0?

R5F21134DFP#U0 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your R5F21134DFP#U0 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 R5F21134DFP#U0?

For technical support, including R5F21134DFP#U0 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your R5F21134DFP#U0 requirements.

6.How does Aetrix verify that R5F21134DFP#U0 is sourced from the original manufacturer or authorized distributors?

All R5F21134DFP#U0 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 R5F21134DFP#U0 meets industry standards.

7.What is the process for return or replacement of R5F21134DFP#U0?

All R5F21134DFP#U0 units undergo pre-shipment inspection (PSI). If there is an issue with R5F21134DFP#U0, 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 R5F21134DFP#U0 part is unused and in its original packaging.

Return procedure for R5F21134DFP#U0:

1.Submit a request within 90 days.

2.Obtain a Return Material Authorization (RMA) from Aetrix.

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