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Renesas R5F211B1DSP#U0
- Part No.:
- R5F211B1DSP#U0
- Manufacturer:
- Renesas
- Category:
- Microcontrollers
- Package:
- 20-LSSOP (0.173", 4.40mm Width)
- Datasheet:
-
R5F211B1DSP#U0.pdf
- Description:
- IC MCU 16BIT 4KB FLASH 20LSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:3,072
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Product details
Overview
R5F211B1DSP#U0 from Renesas Electronics is a 16-bit single-chip microcontroller in the R8C/1B Group, featuring an embedded R8C/Tiny Series CPU core, 4 KB program flash ROM, 1 KB × 2 data flash memory, 384 bytes RAM, and operating 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, I²C bus interface, SSU, and LED drive ports. It targets cost-sensitive industrial control and sensor interface applications requiring nonvolatile data storage.
For engineers reviewing the R5F211B1DSP#U0 datasheet, R5F211B1DSP#U0 pinout, R5F211B1DSP#U0 application, or R5F211B1DSP#U0 equivalent, key selection criteria include its -40°C to +85°C industrial temperature grade, LSSOP-20 package with verified 20-pin PLSP0020JB-A mapping, on-chip data flash endurance (10,000 write/erase cycles), and integrated voltage detection and power-on reset circuits.
Technical Context
The R5F211B1DSP#U0 implements the R8C/Tiny CPU core with 89 fundamental instructions and a 1 Mbyte linear address space. Its dual clock system includes a main crystal/resonator oscillator (XIN/XOUT) and a high-speed on-chip oscillator with frequency adjustment, plus low-speed on-chip oscillator for stop-mode operation.
Peripheral integration centers on mixed-signal control: four analog inputs (AN8–AN11) feed a 10-bit A/D converter; Timer C provides input capture/output compare; and dual serial interfaces support both UART and I²C protocols - all managed via a 7-level priority interrupt controller with 11 internal, 4 external, and 4 software sources.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| CPU Core | R8C/Tiny 16-bit architecture with register bank switching and 20-bit PC for 1 Mbyte addressing |
| Flash Memory | 4 KB program ROM + 2 KB data flash (1 KB × 2 blocks), enabling field-updatable configuration storage |
| Operating Voltage | 2.7 V to 5.5 V - supports direct interface with 3.3 V and 5 V logic systems without level shifters |
| Current Consumption | Typ. 0.7 µA in stop mode - suitable for battery-backed or ultra-low-power wake-on-event designs |
| Ambient Temperature | -40°C to +85°C (D version) - qualified for industrial environments including factory automation and building controls |
| ADC Resolution | 10-bit SAR A/D converter with 4 input channels (AN8–AN11) - sufficient for precision sensor signal digitization |
| Serial Interfaces | 1 UART + 1 I²C + 1 SSU - enables concurrent communication with sensors, displays, and host controllers |
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 I²C bus clock line; also serves as SSU clock and comparator output - requires pull-up for I²C |
| 2 (P3_7) | Timer C Input / TXD1 / SSO | Multi-function pin supporting timer event capture, secondary UART transmit, and 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; open when using external clock source on XIN |
| 6 (XIN) | Main clock oscillator input | Accepts crystal (1–20 MHz), ceramic resonator, or external clock signal - defines system timing base |
| 8 (MODE) | Boot mode select | Must be tied to VCC via resistor to enable normal flash execution mode - critical for reliable boot |
| 9 (P4_5) | External interrupt / RXD1 | Dual-role pin for wake-up interrupt or secondary UART receive - supports low-latency event response |
| 14 (P1_3) | Key interrupt / TZOUT / AN11 | Combines keypad scan input, Timer Z output, and ADC channel - enables compact HMI + sensing designs |
| 16 (VREF) | ADC reference voltage input | Accepts external reference (up to VCC) for improved ADC accuracy - bypass capacitor required |
| 18 (P1_0) | Key interrupt / AN8 / CMP0_0 | Primary key input with analog sensing and comparator capability - ideal for push-button + sensor fusion |
Key Features
| Feature | Design Value |
|---|---|
| Data Flash Endurance | 10,000 write/erase cycles - enables robust logging, calibration storage, and firmware parameter updates |
| Integrated Voltage Detection | On-chip circuit monitors VCC and triggers reset or interrupt below threshold - eliminates external supervisor IC |
| LED Drive Ports | P1_0–P1_3 support direct LED sinking (max 20 mA per pin) - reduces BOM count in status-indicator applications |
| Low-Power Stop Mode | 0.7 µA typical current at 3.0 V - extends battery life in portable or energy-harvesting sensor nodes |
| I²C Bus Interface | Standard-mode (100 kbps) compatible with SMBus alert response - simplifies connection to temperature, humidity, and motion sensors |
Applications
| Industrial Sensor Node | Smart Appliance Control |
|---|---|
|
Use Scenario: Standalone temperature/humidity monitoring unit with local display and I²C sensor interface. IC Role / Device Role / Timing Role: Central controller executing sensor polling, ADC conversion, UART display update, and data flash logging. Use Value: On-chip data flash stores calibration offsets and event logs; 10-bit ADC resolves ±0.5°C thermal drift; -40°C to +85°C rating ensures reliability in unconditioned enclosures. |
Use Scenario: Washing machine main control board managing motor drive, water valve, and user interface. IC Role / Device Role / Timing Role: Real-time task scheduler coordinating PWM motor control, key scan, LED indicators, and fault detection interrupts. Use Value: LED drive ports directly drive status LEDs; 7-level interrupt priority handles urgent overcurrent events; 4 KB flash accommodates motor control algorithms and UI logic. |
| Building Automation Panel | Portable Diagnostic Tool |
|
Use Scenario: HVAC zone controller receiving occupancy and temperature inputs, driving relays and communicating via UART to central gateway. IC Role / Device Role / Timing Role: Mixed-signal interface hub converting analog sensor signals, debouncing digital inputs, and managing UART protocol framing. Use Value: Four ADC channels monitor multiple sensors simultaneously; integrated voltage detection prevents brownout-induced misoperation; LSSOP-20 footprint fits tight PCB layouts. |
Use Scenario: Handheld test instrument capturing analog waveforms, storing measurements, and displaying results on segmented LCD. IC Role / Device Role / Timing Role: Data acquisition engine performing timed ADC sampling, flash-based buffer management, and UART host upload. Use Value: 10,000-cycle data flash retains >10,000 readings without wear leveling; stop-mode current <1 µA enables multi-week battery life; UART+I²C supports probe auto-identification. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar 16-bit microcontroller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| R5F211B2DSP#U0 | 8 KB program ROM, 512 bytes RAM - no change in data flash (1 KB × 2) or peripherals | Supports larger firmware images (e.g., added communication stacks or encryption libraries) | Select when firmware exceeds 4 KB or additional RAM buffers are needed for protocol handling |
| R5F211A1DSP#U0 | No data flash (0 KB); identical CPU, peripherals, package, and temperature grade | Lacks nonvolatile parameter storage - requires external EEPROM or reduced configuration persistence | Choose only if data logging or field calibration is unnecessary and BOM cost reduction is critical |
Compared with R5F211B1DSP#U0, R5F211B2DSP#U0 offers scalable code space while retaining identical data retention and mixed-signal features, whereas R5F211A1DSP#U0 removes data flash entirely - making it unsuitable for applications requiring persistent settings or event history without external memory.
Availability
R5F211B1DSP#U0 is available at Aetrix Electronics and suitable for industrial sensor nodes, smart appliance control, and building automation panels requiring stable component supply across extended production lifecycles.
Supply support for R5F211B1DSP#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/1B Group, including R5F211B1DSP#U0, was designed for cost-optimized, low-power embedded control in appliances, sensors, and industrial equipment - emphasizing integrated data flash, robust analog interfaces, and industrial-grade reliability.
FAQ
What is the maximum operating frequency of the R5F211B1DSP#U0?
The R5F211B1DSP#U0 supports a maximum main clock frequency of 20 MHz at VCC = 3.0–5.5 V, delivering a minimum instruction execution time of 50 ns. This timing is validated under full industrial temperature range (-40°C to +85°C) and applies when using either the external crystal/resonator or the high-speed on-chip oscillator with frequency adjustment enabled.
Does the R5F211B1DSP#U0 include on-chip debug support?
Yes, the R5F211B1DSP#U0 supports on-chip debugging via the single-wire background debug mode (BDM) interface using the dedicated RESET pin. This allows full breakpoint, step-through, and memory inspection capabilities without requiring additional pins or external JTAG hardware - essential for rapid firmware development and field diagnostics.
What is the endurance specification for the data flash in the R5F211B1DSP#U0?
The data flash memory in the R5F211B1DSP#U0 is rated for 10,000 write/erase cycles per block (1 KB × 2 blocks), as specified in the official Renesas documentation. This endurance enables reliable storage of calibration data, device configuration, or usage logs in applications where parameters must survive frequent updates across years of operation.
Can the R5F211B1DSP#U0 operate from a 3.3 V supply?
Yes, the R5F211B1DSP#U0 operates across a supply voltage range of 2.7 V to 5.5 V, fully supporting 3.3 V nominal systems. At 3.0 V and 10 MHz, typical active current is 5 mA (with A/D stopped); at 3.0 V in stop mode, current drops to 0.7 µA - confirming robust low-voltage functionality for modern 3.3 V designs.
Which package type corresponds to the R5F211B1DSP#U0 part number suffix?
The "SP" suffix in R5F211B1DSP#U0 denotes the 20-pin molded-plastic LSSOP package (PLSP0020JB-A). This package has a 0.65 mm lead pitch, gull-wing leads, and is RoHS-compliant. The "D" in the part number indicates the -40°C to +85°C industrial temperature grade, confirmed in Table 1.4 of the Renesas R8C/1B Group datasheet.
R5F211B1DSP#U0 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Renesas
- Package/Case:
- 20-LSSOP (0.173", 4.40mm Width)
- Series:
- R8C/1x/1B
- 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:
- 4KB (4K x 8)
- Program Memory Type:
- FLASH
- EEPROM Size:
- -
- RAM Size:
- 384 x 8
- Voltage - Supply (Vcc/Vdd):
- 2.7V ~ 5.5V
- Data Converters:
- A/D 4x10b
- Oscillator Type:
- Internal
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
R5F211B1DSP#U0 FAQ
1.How can I place an order for R5F211B1DSP#U0 through Aetrix?
Please submit a Request for Quotation (RFQ) for R5F211B1DSP#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 R5F211B1DSP#U0 reliable?
The price and inventory of R5F211B1DSP#U0 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for R5F211B1DSP#U0 is usually 5 days.
3.What payment methods are accepted for R5F211B1DSP#U0?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for R5F211B1DSP#U0 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for R5F211B1DSP#U0?
R5F211B1DSP#U0 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your R5F211B1DSP#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 R5F211B1DSP#U0?
For technical support, including R5F211B1DSP#U0 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your R5F211B1DSP#U0 requirements.
6.How does Aetrix verify that R5F211B1DSP#U0 is sourced from the original manufacturer or authorized distributors?
All R5F211B1DSP#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 R5F211B1DSP#U0 meets industry standards.
7.What is the process for return or replacement of R5F211B1DSP#U0?
All R5F211B1DSP#U0 units undergo pre-shipment inspection (PSI). If there is an issue with R5F211B1DSP#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 R5F211B1DSP#U0 part is unused and in its original packaging.
Return procedure for R5F211B1DSP#U0:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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