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Renesas R5F211B1SP#W4
- Part No.:
- R5F211B1SP#W4
- Manufacturer:
- Renesas
- Category:
- Microcontrollers
- Package:
- 20-LSSOP (0.173", 4.40mm Width)
- Datasheet:
-
R5F211B1SP#W4.pdf
- Description:
- IC MCU 16BIT 4KB FLASH 20LSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:4,955
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Product details
Overview
R5F211B1SP#W4 from Renesas Electronics is a 16-bit single-chip microcontroller in the R8C/1B Group, featuring an 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 ADC, dual UARTs, I²C bus interface, three timers (8-bit ×2, 16-bit ×1), and 13 general-purpose I/O pins - designed for embedded control in cost-sensitive consumer and industrial appliances.
For engineers reviewing the R5F211B1SP#W4 datasheet, R5F211B1SP#W4 pinout, R5F211B1SP#W4 application, or R5F211B1SP#W4 equivalent, key selection considerations include its LSSOP-20 package, -20°C to +85°C ambient rating, on-chip voltage detection and power-on reset, and dual data flash blocks enabling reliable parameter storage without external EEPROM.
Technical Context
The R5F211B1SP#W4 implements the R8C/Tiny Series 16-bit CPU with 89 fundamental instructions and a 1 Mbyte linear address space. Its memory subsystem includes separate program flash (4 KB) and dual-block data flash (1 KB × 2), each with distinct endurance ratings (1,000 and 10,000 erase/write cycles respectively).
Peripheral integration centers on mixed-signal control: a 10-bit A/D converter with four analog inputs (AN8–AN11), two independent serial interfaces supporting UART, clock-synchronous I/O, and I²C, plus timer resources including input capture/output compare (Timer C) and LED drive-capable I/O ports (P1_0–P1_3).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| CPU Core | R8C/Tiny Series 16-bit, 89 instructions, 1 Mbyte address space |
| Memory | 4 KB program flash ROM + 2 KB data flash (1 KB × 2 blocks) + 384 B RAM |
| Max Clock Speed | 20 MHz (50 ns min instruction time at VCC = 3.0–5.5 V) |
| A/D Converter | 10-bit resolution, 4 input channels (AN8–AN11), internal reference support via VREF pin |
| Serial Interfaces | 2 UART channels + 1 I²C bus interface + 1 clock-synchronous serial I/O with chip select (SSU) |
| Timers | Timer X (8-bit), Timer Z (8-bit), Timer C (16-bit with input capture/output compare) |
| Supply Voltage | 2.7–5.5 V (supports 3.3 V and 5 V systems without level shifters) |
| Operating Temp | -20°C to +85°C (standard grade, non-automotive) |
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; also serves as SSU clock and comparator output |
| 2 (P3_7) | TXD1 / CNTR0 / SSO | UART1 transmit; Timer X I/O; SSU data output |
| 3 (RESET) | Active-low reset input | Asynchronous hardware reset; requires external pull-up |
| 4 (XOUT) | Main clock oscillator output | Drives external crystal/resonator; open when using external clock source |
| 5 (VSS/AVSS) | Digital & analog ground | Common return for logic and ADC; decoupling capacitor required between AVSS and AVCC |
| 6 (XIN) | Main clock oscillator input | Accepts crystal, ceramic resonator, or external clock signal |
| 7 (VCC/AVCC) | Digital & analog supply | Single 2.7–5.5 V rail powers core and ADC; AVCC must be filtered |
| 8 (MODE) | Boot mode select | Must be tied to VCC via resistor to enable normal operation |
| 9 (P4_5) | INT0 / RXD1 | External interrupt 0 input and UART1 receive |
| 10 (P1_7) | CNTR00 / INT10 | Timer X counter input and external interrupt 10 |
| 11 (P1_6) | CLK0 / SSI01 | Transfer clock I/O for synchronous serial interface |
| 12 (P1_5) | RXD0 / CNTR01 / INT11 | UART0 receive, Timer X counter input, and external interrupt 11 |
| 13 (P1_4) | TXD0 | UART0 transmit output |
| 14 (P1_3) | KI3 / TZOUT / AN11 | Key interrupt input, Timer Z output, and ADC channel 3 input |
| 15 (P1_2) | KI2 / CMP0_2 / AN10 | Key interrupt input, comparator 0 output, and ADC channel 2 input |
| 16 (VREF) | ADC reference voltage input | Accepts external reference (up to VCC) or internal bandgap; sets ADC full-scale range |
| 17 (P1_1) | KI1 / CMP0_1 / AN9 | Key interrupt input, comparator 0 output, and ADC channel 1 input |
| 18 (P1_0) | KI0 / CMP0_0 / AN8 | Key interrupt input, comparator 0 output, and ADC channel 0 input |
| 19 (P3_3) | INT3 / TCIN / CMP1_0 / SSI00 | External interrupt 3, Timer C input, comparator 1 output, and SSU data I/O |
| 20 (P3_4) | SCS / SDA / CMP1_1 | I²C data line, SSU chip-select, and comparator 1 output |
Key Features
| Feature | Design Value |
|---|---|
| Dual data flash blocks | Enables wear-leveling and atomic updates for calibration data or configuration parameters without external EEPROM |
| Integrated voltage detection & POR | On-chip circuitry ensures reliable reset during brown-out or power-up, eliminating need for external supervisor IC |
| LED drive I/O ports | P1_0–P1_3 support direct LED sinking (up to 20 mA per pin), reducing BOM count in display/control panels |
| Flexible clock system | Combines main crystal oscillator, high-speed on-chip oscillator (adjustable), low-speed on-chip oscillator, and oscillation stop detection |
| Low-power operation modes | Wait mode (35 µA) and stop mode (0.7 µA at 3.0 V) extend battery life in portable equipment |
| Hardware watchdog timer | 15-bit WDT with prescaler and count-source protection prevents runaway code in unattended systems |
Applications
| Home Appliance Control | Industrial Sensor Node |
|---|---|
Use Scenario: Microcontroller in washing machine main board managing motor control, water valve timing, and user interface. IC Role / Device Role / Timing Role: Primary system controller executing real-time motor sequencing, reading front-panel buttons via KI0–KI3, and sampling temperature/pressure sensors via AN8–AN11. Use Value: Integrated UART enables communication with display module; data flash stores cycle history and calibration offsets across power cycles. |
Use Scenario: Standalone environmental sensor unit measuring temperature, humidity, and air quality in factory HVAC ducts. IC Role / Device Role / Timing Role: Data acquisition engine acquiring analog sensor outputs, performing local averaging, and transmitting results via UART to central PLC. Use Value: 10-bit ADC with internal reference eliminates external precision voltage reference; low-power stop mode extends maintenance interval for battery-powered units. |
| Office Equipment Panel | Audio Device Remote Interface |
Use Scenario: Keypad and status display controller in multifunction printer control panel. IC Role / Device Role / Timing Role: Scans mechanical keys (KI0–KI3), drives LED indicators (P1_0–P1_3), and communicates status to main SoC via I²C bus. Use Value: Dedicated LED drive pins reduce external driver transistors; I²C interface provides noise-immune bidirectional communication with minimal pin count. |
Use Scenario: IR remote receiver and volume/display controller in compact Bluetooth speaker. IC Role / Device Role / Timing Role: Decodes NEC IR protocol via INT0/INT3, adjusts DAC via SPI-equivalent SSU, and updates OLED display via UART. Use Value: Dual UART channels allow simultaneous IR command parsing and display update without software arbitration; 20 MHz performance ensures real-time response. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microcontroller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| R5F211A1SP | No data flash (only 4 KB program ROM); identical pinout, peripherals, and package | Lacks field-updatable parameter storage; unsuitable where runtime configuration persistence is required | Select R5F211A1SP only if data flash is unnecessary and cost minimization is critical |
| R5F211B2SP | 8 KB program ROM + same 2 KB data flash; otherwise identical architecture and pin compatibility | Supports larger firmware images (e.g., added communication stacks or UI features) without changing PCB layout | Choose R5F211B2SP when future firmware expansion or enhanced feature set is anticipated |
Compared with R5F211A1SP, R5F211B1SP#W4 adds essential data flash for robust parameter retention, while R5F211B2SP offers scalable code space - both retain full hardware compatibility, enabling design reuse across product tiers without layout revision.
Availability
R5F211B1SP#W4 is available at Aetrix Electronics and suitable for home appliance control, industrial sensor nodes, office equipment panels, and audio device remote interfaces requiring stable component supply and long-term manufacturability.
Supply support for R5F211B1SP#W4 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 industrial, automotive, and IoT markets.
The R8C/1B Group, including R5F211B1SP#W4, was designed for cost-optimized 16-bit embedded control in consumer and general industrial equipment - emphasizing integration, low power, and ease of certification.
FAQ
What is the maximum operating frequency and corresponding supply voltage range for R5F211B1SP#W4?
R5F211B1SP#W4 operates at up to 20 MHz with a supply voltage of 3.0 V to 5.5 V. At 10 MHz, it supports a wider range of 2.7 V to 5.5 V. This dual-voltage/frequency specification allows flexible use in both 3.3 V and 5 V system designs without compromising performance or reliability.
Does R5F211B1SP#W4 include on-chip reset and voltage monitoring functions?
Yes, R5F211B1SP#W4 integrates both a power-on reset (POR) circuit and a voltage detection circuit. These features ensure deterministic initialization and brown-out protection without requiring external supervisor ICs - simplifying design and improving system robustness in variable supply environments.
How many analog input channels does the 10-bit A/D converter in R5F211B1SP#W4 support, and what are their pin assignments?
The R5F211B1SP#W4 includes a single 10-bit A/D converter with four analog input channels: AN8 (P1_0), AN9 (P1_1), AN10 (P1_2), and AN11 (P1_3). Each channel maps directly to a dedicated pin, and the VREF pin allows external reference voltage selection for precise measurement scaling.
Can R5F211B1SP#W4 execute code from data flash memory?
No, R5F211B1SP#W4 executes code only from program flash ROM. The 2 KB data flash (1 KB × 2 blocks) is intended exclusively for non-volatile data storage - such as calibration coefficients, device IDs, or user settings - and cannot be used for instruction fetch.
Is R5F211B1SP#W4 pin-compatible with other members of the R8C/1B Group in the same package?
Yes, all R8C/1B Group devices in the PLSP0020JB-A (LSSOP-20) package - including R5F211B1SP#W4, R5F211B2SP, and R5F211B3SP - share identical pinouts and electrical characteristics. Firmware and hardware designs can scale across memory variants without PCB changes.
R5F211B1SP#W4 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Renesas
- Package/Case:
- 20-LSSOP (0.173", 4.40mm Width)
- Series:
- R8C/1x/1B
- Packaging:
- Tape & Reel (TR)
- 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:
- -20°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
R5F211B1SP#W4 FAQ
1.How can I place an order for R5F211B1SP#W4 through Aetrix?
Please submit a Request for Quotation (RFQ) for R5F211B1SP#W4 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 R5F211B1SP#W4 reliable?
The price and inventory of R5F211B1SP#W4 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for R5F211B1SP#W4 is usually 5 days.
3.What payment methods are accepted for R5F211B1SP#W4?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for R5F211B1SP#W4 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for R5F211B1SP#W4?
R5F211B1SP#W4 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your R5F211B1SP#W4 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 R5F211B1SP#W4?
For technical support, including R5F211B1SP#W4 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your R5F211B1SP#W4 requirements.
6.How does Aetrix verify that R5F211B1SP#W4 is sourced from the original manufacturer or authorized distributors?
All R5F211B1SP#W4 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 R5F211B1SP#W4 meets industry standards.
7.What is the process for return or replacement of R5F211B1SP#W4?
All R5F211B1SP#W4 units undergo pre-shipment inspection (PSI). If there is an issue with R5F211B1SP#W4, 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 R5F211B1SP#W4 part is unused and in its original packaging.
Return procedure for R5F211B1SP#W4:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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