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Renesas R5F211A3SP#U0
- Part No.:
- R5F211A3SP#U0
- Manufacturer:
- Renesas
- Category:
- Microcontrollers
- Package:
- 20-LSSOP (0.173", 4.40mm Width)
- Datasheet:
-
R5F211A3SP#U0.pdf
- Description:
- IC MCU 16BIT 12KB FLASH 20LSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:2,279
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Product details
Overview
R5F211A3SP#U0 from Renesas Electronics is a 16-bit single-chip microcontroller in the R8C/1A Group, featuring an R8C/Tiny Series CPU core, 12 KB on-chip flash program memory, 768 bytes RAM, and operation at up to 20 MHz (50 ns min instruction time). It integrates a 10-bit 4-channel A/D converter, three timers (8-bit ×2, 16-bit ×1), UART, clock-synchronous serial I/O, I²C bus interface, and LED drive capability. It targets cost-sensitive embedded control in consumer appliances and industrial sensors.
For engineers reviewing the R5F211A3SP#U0 datasheet, R5F211A3SP#U0 pinout, R5F211A3SP#U0 application, or R5F211A3SP#U0 equivalent, key selection considerations include its 20-pin LSSOP package (PLSP0020JB-A), -20°C to +85°C operating range, integrated voltage detection and power-on reset, and absence of data flash-distinguishing it from R8C/1B Group variants.
Technical Context
The R5F211A3SP#U0 implements the R8C/Tiny Series CPU with 89 fundamental instructions and a 1 Mbyte linear address space. Its dual clock system includes a main crystal/resonator oscillator (XIN/XOUT) and an on-chip high-speed oscillator with frequency adjustment, plus oscillation stop detection for fail-safe timing recovery.
Peripheral integration centers on real-time control: Timer C supports input capture and output compare for motor timing; UART and I²C enable host communication; the 4-channel 10-bit A/D converter interfaces directly with analog sensors; and four dedicated LED drive ports simplify display subsystem design without external drivers.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| CPU Core | R8C/Tiny Series 16-bit CPU with 89 instructions and 1 Mbyte address space |
| Flash Memory | 12 KB program ROM - sufficient for moderate firmware with bootloader and application logic |
| RAM | 768 bytes - supports stack, variables, and small buffers for sensor data processing |
| Max Clock Speed | 20 MHz (50 ns min instruction time at VCC = 3.0–5.5 V) - enables responsive real-time control loops |
| A/D Converter | 10-bit resolution, 4 input channels - suitable for thermistor, potentiometer, and voltage monitoring |
| Operating Temp | -20°C to +85°C - validated for indoor consumer and general industrial environments |
| Supply Voltage | 2.7 V to 5.5 V - compatible with single-cell Li-ion, 3.3 V, and 5 V system rails |
Pinout & Package
Package: 20-pin molded-plastic LSSOP (PLSP0020JB-A), 0.65 mm pitch, surface-mount, RoHS-compliant.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (P3_5) | I²C Clock / SSCK / CMP1_2 | Shared SCL line for I²C master/slave; also serves as chip-select clock for SSU and comparator output |
| 2 (P3_7) | Timer X Input / TXD1 / SSO | Primary timer input for event counting; second UART transmit; SSU data output |
| 3 (RESET) | Active-low reset input | Asynchronous hardware reset; internal pull-up ensures reliable startup without external RC network |
| 4 (XOUT) | Main clock oscillator output | Drives external crystal/resonator; configured as input-only port P4_7 when not used for oscillation |
| 6 (XIN) | Main clock oscillator input | Accepts crystal, ceramic resonator, or external clock source; enables precise timing for UART baud generation |
| 9 (P4_5) | External interrupt 0 / RXD1 | Dual-function pin for wake-up from low-power modes and second UART receive channel |
| 14 (P1_3) | Key interrupt 3 / TZOUT / AN11 | Supports capacitive touch or mechanical switch sensing; provides Timer Z output pulse; third A/D input |
| 16 (VREF) | A/D reference voltage input | Accepts external reference (e.g., precision bandgap) to improve ADC accuracy beyond internal VCC scaling |
| 18 (P1_0) | Key interrupt 0 / AN8 / CMP0_0 | First key scan input; primary analog sensor input; comparator channel 0 positive input |
| 20 (P3_4) | I²C Data / SCS / CMP1_1 | Shared SDA line for bidirectional I²C communication; chip-select signal for SSU; comparator output |
Key Features
| Feature | Design Value |
|---|---|
| Integrated Power Management | On-chip voltage detector and power-on reset eliminate need for external supervisor IC in most applications |
| Low-Power Operation | 0.7 µA in stop mode and 35 µA in wait mode enable battery-powered operation for months |
| LED Drive Capability | Four I/O pins (P1_0–P1_3) support direct LED sinking up to 20 mA - reduces BOM count in display interfaces |
| Flexible Clock Sources | Dual oscillators (external crystal + adjustable on-chip high-speed) allow fast wake-up from sleep and robust clock fallback |
| Hardware Peripherals | UART + I²C + SSU + 10-bit 4-channel ADC + three timers - cover most sensor-to-processor and control-to-actuator paths |
Applications
| Home Appliance Control | Industrial Sensor Node |
|---|---|
|
Use Scenario: Microcontroller in washing machine control board managing motor sequencing, water level sensing, and user interface. IC Role / Device Role / Timing Role: Central execution unit coordinating PWM-driven motor drivers, reading pressure transducer via A/D, and scanning push-button inputs. Use Value: Integrated LED drive ports directly illuminate status indicators; UART enables service-mode diagnostics via PC connection. |
Use Scenario: Standalone temperature/humidity sensor node transmitting data over I²C to a gateway MCU. IC Role / Device Role / Timing Role: Sensor interface and local preprocessing unit - reads analog sensor outputs, applies calibration, and packages data for transmission. Use Value: 10-bit A/D resolution and internal VREF ensure ±1°C temperature accuracy; low-power stop mode extends battery life to >2 years. |
| Office Equipment | Audio Peripheral Control |
|
Use Scenario: Embedded controller in document scanner managing paper feed motors, CIS sensor timing, and USB HID reporting. IC Role / Device Role / Timing Role: Real-time motion controller using Timer C input capture to monitor encoder feedback and adjust stepper motor phase timing. Use Value: 16-bit Timer C with input capture provides sub-millisecond timing resolution for precise paper transport synchronization. |
Use Scenario: Volume, mute, and source selector logic in powered speaker system with IR remote interface. IC Role / Device Role / Timing Role: Key input processor and digital audio control hub - decodes IR commands, adjusts DAC registers, and drives LED volume bar. Use Value: Four built-in LED drive ports directly control 4-segment bar graph; KI0–KI3 inputs support debounced matrix scanning without external logic. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microcontroller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| R5F211A4SP#U0 | 16 KB flash, 1 KB RAM - +4 KB program memory, +256 bytes RAM vs. R5F211A3SP#U0 | Suitable for larger firmware images requiring OTA update partition or expanded feature set | Select when future firmware growth or additional protocol stacks (e.g., Modbus RTU) are anticipated |
| R5F211B3SP#U0 | Includes 2 KB data flash (1 KB × 2 blocks); same 12 KB program ROM and 768 bytes RAM | Enables non-volatile parameter storage (e.g., calibration coefficients, device ID) without external EEPROM | Choose when field-updatable configuration data or wear-leveling logging is required |
Compared with R5F211A4SP#U0, the R5F211A3SP#U0 offers optimal memory sizing for stable, fixed-function firmware; compared with R5F211B3SP#U0, it omits data flash to reduce cost and simplify qualification where parameter persistence is handled externally.
Availability
R5F211A3SP#U0 is available at Aetrix Electronics and suitable for home appliance control, industrial sensor nodes, office equipment, and audio peripheral designs requiring stable component supply, long-term lifecycle support, and RoHS-compliant manufacturing.
Supply support for R5F211A3SP#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 specializing in microcontrollers, analog, power, and SoC solutions for automotive, industrial, and IoT markets.
The R8C/1A Group, including R5F211A3SP#U0, was designed for cost-optimized 16-bit embedded control in consumer and general industrial applications-emphasizing integration, low power, and ease of use without sacrificing real-time performance.
FAQ
What is the maximum operating frequency of the R5F211A3SP#U0?
The R5F211A3SP#U0 operates at up to 20 MHz when supplied with 3.0–5.5 V, achieving a minimum instruction execution time of 50 ns. At lower supply voltages (2.7–5.5 V), the maximum frequency is 10 MHz with 100 ns minimum instruction time. This dual-speed specification allows flexible power/performance trade-offs across battery and line-powered systems.
Does the R5F211A3SP#U0 include data flash memory?
No, the R5F211A3SP#U0 belongs to the R8C/1A Group and contains only program flash memory (12 KB). It does not include data flash. For data flash functionality, consider the pin-compatible R5F211B3SP#U0 (R8C/1B Group), which adds 2 KB of data flash (1 KB × 2 blocks) while retaining identical program memory, RAM, and peripheral sets.
Which package type is used for the R5F211A3SP#U0?
The R5F211A3SP#U0 is packaged in a 20-pin molded-plastic LSSOP (PLSP0020JB-A), a surface-mount package with 0.65 mm lead pitch. This compact, gull-wing package supports automated assembly and provides thermal and electrical performance suitable for consumer-grade applications operating from -20°C to +85°C.
What peripherals are integrated into the R5F211A3SP#U0?
The R5F211A3SP#U0 integrates a 10-bit 4-channel A/D converter, three timers (8-bit Timer X and Z, 16-bit Timer C with input capture/output compare), UART, clock-synchronous serial I/O, I²C bus interface, SSU (clock-synchronous serial I/O with chip select), watchdog timer, and four LED drive-capable I/O ports - all on a single die with no external components required for basic operation.
How does the R5F211A3SP#U0 handle power-on reset and voltage monitoring?
The R5F211A3SP#U0 includes an on-chip power-on reset circuit and voltage detection circuit, eliminating the need for external reset supervisors in most designs. The voltage detector triggers reset if VCC drops below a threshold (typically ~2.5 V), ensuring reliable initialization and brown-out protection without additional components.
R5F211A3SP#U0 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Renesas
- Package/Case:
- 20-LSSOP (0.173", 4.40mm Width)
- Series:
- R8C/1x/1A
- Packaging:
- Tube
- Product Status:
- Obsolete
- Programmable:
- Not Verified
- Core Processor:
- R8C
- Core Size:
- 16-Bit
- Speed:
- 20MHz
- Connectivity:
- I2C, SIO, SSU, UART/USART
- Peripherals:
- LED, POR, Voltage Detect, WDT
- Number of I/O:
- 13
- 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 4x10b
- Oscillator Type:
- Internal
- Operating Temperature:
- -20°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
R5F211A3SP#U0 FAQ
1.How can I place an order for R5F211A3SP#U0 through Aetrix?
Please submit a Request for Quotation (RFQ) for R5F211A3SP#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 R5F211A3SP#U0 reliable?
The price and inventory of R5F211A3SP#U0 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for R5F211A3SP#U0 is usually 5 days.
3.What payment methods are accepted for R5F211A3SP#U0?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for R5F211A3SP#U0 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for R5F211A3SP#U0?
R5F211A3SP#U0 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your R5F211A3SP#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 R5F211A3SP#U0?
For technical support, including R5F211A3SP#U0 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your R5F211A3SP#U0 requirements.
6.How does Aetrix verify that R5F211A3SP#U0 is sourced from the original manufacturer or authorized distributors?
All R5F211A3SP#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 R5F211A3SP#U0 meets industry standards.
7.What is the process for return or replacement of R5F211A3SP#U0?
All R5F211A3SP#U0 units undergo pre-shipment inspection (PSI). If there is an issue with R5F211A3SP#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 R5F211A3SP#U0 part is unused and in its original packaging.
Return procedure for R5F211A3SP#U0:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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