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Renesas R5F21103FP#U0
- Part No.:
- R5F21103FP#U0
- Manufacturer:
- Renesas
- Category:
- Microcontrollers
- Package:
- 32-LQFP
- Datasheet:
-
R5F21103FP#U0.pdf
- Description:
- IC MCU 16BIT 12KB FLASH 32LQFP
- Quantity:
- Payment:
- Shipping:
Inventory:2,076
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Product details
Overview
R5F21103FP#U0 from Renesas Electronics is a 16-bit Flash microcontroller in the R8C/10 Group, built on the R8C/Tiny Series CPU core and packaged in a 32-pin LQFP (PLQP0032GB-A). It delivers 62.5 ns minimum instruction execution at 16 MHz, integrates 12 KB Flash memory and 768 bytes RAM, and supports 22 I/O pins including LED drive capability - deployed in household appliances, office equipment, and sensor-based housing systems.
For engineers reviewing the R5F21103FP#U0 datasheet, R5F21103FP#U0 pinout, R5F21103FP#U0 application, or R5F21103FP#U0 equivalent, key selection criteria include its 10-bit 8-channel ADC, dual UART interfaces (one clock-synchronous), three 8-bit timers plus one 16-bit timer with input capture, watchdog timer, and operating voltage range of 2.7–5.5 V across –20 to +85 °C ambient.
Technical Context
The R5F21103FP#U0 implements the R8C/Tiny CPU core with 89 basic instructions and a 1-Mbyte address space. Its memory architecture allocates internal Flash (12 KB) starting at 0xC000 and RAM (768 B) beginning at 0x0400, with SFRs mapped to 0x0000–0x02FF. The MCU operates in single-chip mode with two independent clock generation circuits: a main crystal/resonator oscillator (XIN/XOUT) and an on-chip oscillator.
Peripheral integration includes UART0 (clock-synchronous or UART mode) and UART1 (UART-only), a 10-bit successive-approximation A/D converter with 8 analog inputs (AN0–AN7), and four external interrupt sources (INT0–INT3) plus five internal interrupt factors. Power management supports Wait mode (35 µA typical) and Stop mode (0.7 µA typical) at 3.0 V.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| CPU Core | R8C/Tiny 16-bit, 89 instructions, 1-Mbyte address space |
| Flash / RAM | 12 KB program Flash, 768 bytes RAM - sufficient for mid-complexity control firmware with data buffering |
| Operating Voltage | 2.7–5.5 V - compatible with both 3.3 V and 5 V system rails without level-shifting |
| ADC | 10-bit resolution, 8 channels (AN0–AN7) - enables simultaneous monitoring of multiple sensors |
| Timers | Three 8-bit timers (X/Y/Z) + one 16-bit Timer C with input capture - supports PWM generation, pulse counting, and time-stamped event capture |
| Serial Interfaces | UART0 (configurable clock-sync/UART) + UART1 (UART only) - allows dual asynchronous comms or master-slave synchronous protocol |
| Package | 32-pin LQFP (PLQP0032GB-A), 7 × 7 mm, 0.8 mm pitch - surface-mount compatible with standard reflow profiles |
Pinout & Package
Package: 32-pin plastic mold LQFP (PLQP0032GB-A), 7 × 7 mm body, 0.8 mm lead pitch, exposed pad not specified.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| XIN / P46 | Main clock input | Accepts external crystal (1–16 MHz) or ceramic resonator; required for precise timing and full-speed operation |
| XOUT / P47 | Main clock output | Drives external crystal/resonator; P47 functions as input-only when used in oscillator mode |
| RESET | Active-low reset input | Asynchronous reset asserted by low-level signal; requires external pull-up resistor |
| P00–P07 | Analog/digital I/O ports | AN0–AN7 multiplexed on P00–P07; support A/D conversion and general-purpose digital I/O with programmable pull-ups |
| P10–P17 | LED drive I/O ports | Capable of direct LED sinking; configured via port direction registers for current-limited output |
| RxD0 / TxD0 | UART0 serial interface | Full-duplex UART channel supporting baud rates up to 1 Mbps at 16 MHz system clock |
| RxD1 / TxD10 / TxD11 | UART1 serial interface | UART1 supports TxD10/RxD1 (shared pin) and TxD11 (separate pin); enables dual UART or clock-sync slave mode |
| AVcc / AVss | Analog power supply | Dedicated analog domain supply; must be decoupled with 0.1 µF capacitor between AVcc and AVss for ADC accuracy |
Key Features
| Feature | Design Value |
|---|---|
| On-chip oscillator | Enables immediate operation without external crystal; reduces BOM cost and board space for non-critical timing apps |
| Oscillation stop detection | Monitors XIN/XOUT activity and triggers reset or interrupt if main clock fails - critical for fail-safe embedded control |
| Wait/Stop low-power modes | 35 µA (Wait) and 0.7 µA (Stop) at 3.0 V - extends battery life in portable or energy-constrained sensor nodes |
| Interrupt priority levels | 7 configurable priority levels with 14 total interrupt sources (9 internal, 5 external) - supports deterministic real-time response |
| Flash endurance | 100 program/erase cycles - suitable for field firmware updates with infrequent reprogramming |
Applications
| Home Appliance Control | Office Equipment Interface |
|---|---|
Use Scenario: Microcontroller in washing machine control panel managing motor sequencing, water level sensing, and user interface. IC Role / Device Role / Timing Role: Primary system controller executing real-time motor control loops and coordinating ADC readings from pressure/temperature sensors. Use Value: Integrated 10-bit 8-channel ADC and dual UART enable direct sensor interfacing and communication with display modules without external components. |
Use Scenario: Embedded controller in multifunction printer handling paper feed logic, button scanning, and status LED feedback. IC Role / Device Role / Timing Role: Central I/O manager driving LEDs via P10–P17 ports and polling mechanical switches using KI0–KI3 interrupt-capable inputs. Use Value: LED drive ports eliminate external drivers; key input interrupts reduce CPU polling overhead and improve responsiveness. |
| Housing Security Sensor Node | Industrial Panel Controller |
Use Scenario: Battery-powered door/window sensor node transmitting alarm events over UART to a central hub. IC Role / Device Role / Timing Role: Low-power sensor aggregator sampling magnetic reed switches and environmental sensors, then entering Stop mode between transmissions. Use Value: 0.7 µA Stop mode current and integrated UART allow multi-year battery life with periodic wake-up and wireless backhaul. |
Use Scenario: Front-panel controller in HVAC system managing temperature setpoint input, fan speed control, and fault reporting. IC Role / Device Role / Timing Role: Real-time peripheral coordinator using Timer C input capture to measure tachometer pulses and UART0 to report diagnostics. Use Value: 16-bit Timer C with input capture provides precise RPM measurement; dual UART supports local HMI and remote service interface simultaneously. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar 16-bit microcontroller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| R5F21104FP#U0 | 16 KB Flash, 1 KB RAM - +4 KB program storage and +256 B RAM vs. R5F21103FP#U0 | Suitable for larger firmware images requiring more ISR handlers or lookup tables | Select when firmware size exceeds 12 KB or additional RAM buffers are needed for communication stacks |
| R5F21102FP#U0 | 8 KB Flash, 512 B RAM - –4 KB Flash and –256 B RAM vs. R5F21103FP#U0 | Targeted at cost-sensitive, functionally minimal control tasks with compact code | Choose for simpler applications where 8 KB Flash suffices and BOM cost reduction is prioritized |
Compared with R5F21103FP#U0, R5F21104FP#U0 offers headroom for feature expansion while R5F21102FP#U0 reduces cost for stable, minimal-code deployments - all share identical pinout, peripherals, and package, enabling scalable design reuse.
Availability
R5F21103FP#U0 is available at Aetrix Electronics and suitable for home appliance control, office equipment interface, and housing security sensor nodes requiring stable component supply and long-term industrial availability.
Supply support for R5F21103FP#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, formed in 2010 from the merger of NEC Electronics and Renesas Technology, is a global semiconductor leader focused on microcontrollers, analog, and power solutions.
The R8C/10 Group targets cost-effective, low-power 16-bit control applications in consumer and industrial equipment, emphasizing integration of ADC, UART, timers, and LED drive in compact LQFP packages.
FAQ
What is the maximum operating frequency of the R5F21103FP#U0?
The R5F21103FP#U0 achieves a minimum instruction execution time of 62.5 ns at 16 MHz system clock (VCC = 3.0–5.5 V). Its main clock circuit supports external crystals or resonators up to 16 MHz, and the on-chip oscillator provides lower-accuracy alternatives for reduced component count. The CPU core does not support frequencies beyond 16 MHz per official specifications.
Does the R5F21103FP#U0 support in-circuit debugging?
Yes, the R5F21103FP#U0 supports on-chip debugging via dedicated pins. However, pins P00/AN7/TxD11 and P37/TxD10/RxD1 must not be used during debug sessions, as they are shared with the on-chip debugger interface. Debug functionality requires Renesas E8 or E10 emulator hardware and associated software tools.
What are the ADC reference voltage options for the R5F21103FP#U0?
The R5F21103FP#U0 ADC uses AVcc as the default reference voltage. The VREF pin (P07/AN0) can be configured as an external reference input, but documentation specifies it must be connected to Vcc for proper operation unless an external precision reference is applied. Internal reference is not provided - accuracy depends on AVcc stability and decoupling.
Can the R5F21103FP#U0 operate from a 3.3 V supply?
Yes, the R5F21103FP#U0 operates across 2.7–5.5 V, making it fully compatible with 3.3 V systems. At 3.0 V, it supports up to 10 MHz operation (100 ns min. instruction time); at 3.3 V, it can run at full 16 MHz with appropriate bypassing and layout. AVcc and IVcc must be properly decoupled per datasheet guidelines.
Is the R5F21103FP#U0 pin-compatible with other R8C/10 Group devices?
Yes, all R8C/10 Group MCUs in the FP package (PLQP0032GB-A), including R5F21102FP#U0, R5F21103FP#U0, and R5F21104FP#U0, share identical pin assignments and electrical characteristics. Firmware and PCB designs are interchangeable across these variants, differing only in Flash/RAM capacity - enabling scalable product families with zero layout changes.
R5F21103FP#U0 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Renesas
- Package/Case:
- 32-LQFP
- Series:
- R8C/1x/10
- Packaging:
- Tray
- Product Status:
- Obsolete
- Programmable:
- Not Verified
- Core Processor:
- R8C
- Core Size:
- 16-Bit
- Speed:
- 16MHz
- Connectivity:
- SIO, UART/USART
- Peripherals:
- LED, WDT
- Number of I/O:
- 22
- Program Memory Size:
- 12KB (12K x 8)
- Program Memory Type:
- FLASH
- EEPROM Size:
- -
- RAM Size:
- 768 x 8
- Voltage - Supply (Vcc/Vdd):
- 2.7V ~ 5.5V
- Data Converters:
- A/D 8x10b
- Oscillator Type:
- Internal
- Operating Temperature:
- -20°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
R5F21103FP#U0 FAQ
1.How can I place an order for R5F21103FP#U0 through Aetrix?
Please submit a Request for Quotation (RFQ) for R5F21103FP#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 R5F21103FP#U0 reliable?
The price and inventory of R5F21103FP#U0 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for R5F21103FP#U0 is usually 5 days.
3.What payment methods are accepted for R5F21103FP#U0?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for R5F21103FP#U0 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for R5F21103FP#U0?
R5F21103FP#U0 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your R5F21103FP#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 R5F21103FP#U0?
For technical support, including R5F21103FP#U0 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your R5F21103FP#U0 requirements.
6.How does Aetrix verify that R5F21103FP#U0 is sourced from the original manufacturer or authorized distributors?
All R5F21103FP#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 R5F21103FP#U0 meets industry standards.
7.What is the process for return or replacement of R5F21103FP#U0?
All R5F21103FP#U0 units undergo pre-shipment inspection (PSI). If there is an issue with R5F21103FP#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 R5F21103FP#U0 part is unused and in its original packaging.
Return procedure for R5F21103FP#U0:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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