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Renesas R5F211A1DSP#U0
- Part No.:
- R5F211A1DSP#U0
- Manufacturer:
- Renesas
- Category:
- Microcontrollers
- Package:
- 20-LSSOP (0.173", 4.40mm Width)
- Datasheet:
-
R5F211A1DSP#U0.pdf
- Description:
- IC MCU 16BIT 4KB FLASH 20LSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:2,146
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Product details
Overview
R5F211A1DSP#U0 from Renesas Electronics is a 16-bit single-chip microcontroller in the R8C/1A Group, featuring an R8C/Tiny Series CPU core, 4 KB flash program memory, 384 bytes RAM, and operation over −40°C to +85°C. It integrates a 10-bit 4-channel ADC, dual 8-bit timers (X/Z), one 16-bit timer C with input capture/output compare, UART, clock-synchronous serial I/O, I²C bus interface, and LED drive capability on four I/O pins. It targets compact embedded control in appliance and industrial sensor systems.
For engineers reviewing the R5F211A1DSP#U0 datasheet, R5F211A1DSP#U0 pinout, R5F211A1DSP#U0 application, or R5F211A1DSP#U0 equivalent, key selection considerations include its −40°C to +85°C industrial temperature grade, LSSOP-20 package (PLSP0020JB-A), 2.7–5.5 V supply range, low-power stop mode (0.7 µA), and integrated voltage detection and power-on reset circuits.
Technical Context
The R5F211A1DSP#U0 implements the R8C/Tiny Series 16-bit CPU with 89 fundamental instructions and executes at 50 ns minimum instruction time (20 MHz XIN, 3.0–5.5 V). Its memory map spans 1 Mbyte, supporting efficient addressing for real-time control tasks.
It features two independent clock generation circuits: a main crystal/resonator oscillator (XIN/XOUT) and an on-chip high-speed oscillator with frequency adjustment, plus oscillation stop detection. Peripheral integration includes three serial interfaces (UART, clock-sync I/O, I²C), 13 general-purpose I/O pins (4 LED-drive capable), and interrupt support across 11 internal, 4 external, and 4 software sources with 7 priority levels.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| CPU Core | R8C/Tiny Series 16-bit, 89 instructions, 50 ns min. execution (20 MHz) |
| Memory | 4 KB flash program ROM, 384 bytes RAM - sufficient for small firmware with real-time ISR handling |
| Operating Temp | −40°C to +85°C (D version) - qualified for industrial ambient environments without derating |
| Supply Voltage | 2.7 V to 5.5 V - supports direct connection to 3.3 V or 5 V rails without regulators |
| ADC | 10-bit, 4-channel - enables analog sensing of temperature, voltage, or sensor outputs with single-ended inputs |
| Low-Power Modes | Wait mode: 35 µA; Stop mode: 0.7 µA (VCC = 3.0 V) - extends battery life in portable or energy-conscious designs |
| Package | LSSOP-20 (PLSP0020JB-A), 0.65 mm pitch - surface-mount compatible with standard reflow profiles |
Pinout & Package
Package: 20-pin molded-plastic LSSOP (PLSP0020JB-A), 0.65 mm lead pitch, 7.6 mm × 4.4 mm body size.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (P3_5) | I/O port / SSCK / SCL | Shared clock signal for SSU and I²C - requires pull-up for I²C, direction-controlled for SSU |
| 2 (P3_7) | I/O port / CNTR0 / TXD1 | Timer X counter input and UART1 transmit - multiplexed function requiring software configuration |
| 3 (RESET) | Active-low reset input | Asynchronous reset assertion clears CPU state and peripherals - must be held low ≥100 ns for valid reset |
| 4 (XOUT) | Main clock oscillator output | Drives external crystal/resonator feedback path; open when using external clock source on XIN |
| 5 (VSS/AVSS) | Digital/analog ground | Common reference for logic and ADC - recommended separate decoupling from AVCC for noise immunity |
| 6 (XIN) | Main clock oscillator input | Accepts crystal (1–20 MHz), ceramic resonator, or external clock - determines system timing base |
| 7 (VCC/AVCC) | Digital/analog supply | Single 2.7–5.5 V rail powers core and ADC - AVCC requires local 0.1 µF bypass to AVSS |
| 8 (MODE) | Boot mode select | Must be tied to VCC via resistor to enable normal flash execution from reset vector |
| 9 (P4_5) | I/O port / INT0 / RXD1 | External interrupt 0 trigger and UART1 receive - supports wake-from-stop on falling edge |
| 10 (P1_7) | I/O port / INT10 / CNTR00 | Timer X channel 0 counter input and interrupt source - configurable as digital input or counter gate |
| 11 (P1_6) | I/O port / CLK0 / SSI01 | Serial clock output for UART/SSI - drives external peripheral sync timing at programmable baud rate |
| 12 (P1_5) | I/O port / INT11 / CNTR01 / RXD0 | UART0 receive and Timer X channel 1 input - dual-role pin managed by peripheral enable registers |
| 13 (P1_4) | I/O port / TXD0 | UART0 transmit output - CMOS-level driver capable of driving 10 kΩ load at full speed |
| 14 (P1_3) | I/O port / KI3 / TZOUT / AN11 | Key interrupt input, Timer Z output, and ADC channel 3 - software-selectable function per pin control register |
| 15 (P1_2) | I/O port / KI2 / CMP0_2 / AN10 | Key interrupt, comparator output, and ADC channel 2 - shared analog/digital routing with internal mux |
| 16 (VREF) | Analog reference input | Accepts external reference (0–VCC) or internal VCC for ADC - sets full-scale conversion range |
| 17 (P1_1) | I/O port / KI1 / CMP0_1 / AN9 | Key interrupt, comparator output, and ADC channel 1 - supports wake-from-stop on key press |
| 18 (P1_0) | I/O port / KI0 / CMP0_0 / AN8 | Key interrupt, comparator output, and ADC channel 0 - primary analog input for sensor front-end |
| 19 (P3_3) | I/O port / INT3 / TCIN / CMP1_0 / SSI00 | Timer C input, external interrupt 3, comparator input, and SSU data - high-impedance input when unused |
| 20 (P3_4) | I/O port / CMP1_1 / SCS / SDA | I²C data line, SSU chip select, and comparator input - bidirectional with open-drain capability for I²C |
Key Features
| Feature | Design Value |
|---|---|
| Integrated voltage detection | On-chip circuit monitors VCC and triggers reset if supply drops below selectable threshold - eliminates external supervisor IC |
| LED drive ports | Four I/O pins (P1_0–P1_3) support direct LED sinking up to 20 mA - reduces BOM count in indicator-heavy designs |
| High-speed on-chip oscillator | Adjustable internal RC oscillator (1–20 MHz) enables fast wake-up from stop mode without external crystal - cuts boot time |
| Flash endurance | 1,000 write/erase cycles for program ROM - sufficient for field firmware updates in maintenance-restricted deployments |
| Hardware watchdog timer | 15-bit timer with prescaler and reset-start select - prevents runaway code in safety-critical control loops |
| I²C bus interface | Full-compliant I²C master/slave with SCL/SDA pins and built-in arbitration - simplifies communication with EEPROMs and sensors |
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 real-time controller executing state machine logic, sampling ADC channels for pressure/temperature, and driving LED indicators. Use Value: Integrated 4-channel ADC and LED drive ports reduce external component count; −40°C to +85°C rating ensures reliability across laundry room thermal cycles. |
Use Scenario: Compact environmental monitor deployed in factory HVAC ducts measuring temperature, humidity, and air quality. IC Role / Device Role / Timing Role: Low-power data acquisition node performing periodic ADC reads, processing sensor data, and transmitting via UART to gateway. Use Value: 0.7 µA stop mode extends battery life to multi-year intervals; I²C interface allows direct connection to digital sensors without level shifters. |
| Office Equipment | Portable Medical Device |
|
Use Scenario: Embedded controller in document scanner managing stepper motor motion, CIS image sensor interface, and button inputs. IC Role / Device Role / Timing Role: Timing-critical motion controller synchronizing motor pulses with sensor exposure, while handling key interrupts for user commands. Use Value: 16-bit Timer C with input capture precisely measures encoder feedback; 89-instruction set enables efficient real-time loop execution. |
Use Scenario: Battery-powered blood glucose meter requiring precise analog measurement, LCD display control, and USB-serial communication. IC Role / Device Role / Timing Role: Analog front-end processor acquiring and digitizing test strip signals, managing LCD segments, and formatting UART output for host PC. Use Value: On-chip voltage detection ensures accurate ADC reference during battery discharge; 384 bytes RAM accommodates calibration tables and result buffers. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar 16-bit microcontroller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| R5F211A2DSP#U0 | 8 KB flash, 512 bytes RAM - double program storage and RAM capacity | Suitable for larger firmware with protocol stacks or extended feature sets | Select when firmware exceeds 4 KB or requires additional RAM for buffering or multitasking |
| R5F211B1DSP#U0 | Includes 2 KB data flash (1 KB × 2 blocks) - supports EEPROM-like nonvolatile data storage | Required for applications needing field-updatable calibration data or event logging | Choose only if persistent parameter storage beyond program flash is mandatory; otherwise R5F211A1DSP#U0 offers lower cost |
Compared with R5F211A2DSP#U0, the R5F211A1DSP#U0 provides adequate resources for basic control tasks at lower cost and footprint; versus R5F211B1DSP#U0, it omits data flash but delivers identical core performance and peripheral set for fixed-parameter implementations.
Availability
R5F211A1DSP#U0 is available at Aetrix Electronics and suitable for home appliance control, industrial sensor nodes, and office equipment requiring stable component supply and long-term industrial temperature support.
Supply support for R5F211A1DSP#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, and power solutions for industrial, automotive, and consumer markets.
The R8C/1A Group, including R5F211A1DSP#U0, was designed for cost-sensitive, space-constrained embedded control applications demanding low power, integrated analog peripherals, and industrial-grade reliability.
FAQ
What is the maximum operating frequency of the R5F211A1DSP#U0?
The R5F211A1DSP#U0 supports a maximum main clock frequency of 20 MHz when powered at 3.0–5.5 V, delivering a minimum instruction execution time of 50 ns. This frequency is achieved using an external crystal or ceramic resonator connected between XIN and XOUT, or via the internal high-speed oscillator with frequency adjustment enabled.
Does the R5F211A1DSP#U0 include data flash memory?
No, the R5F211A1DSP#U0 belongs to the R8C/1A Group and contains only program flash memory (4 KB). It does not include dedicated data flash. For data flash functionality, the R8C/1B Group part R5F211B1DSP#U0 provides 2 KB (1 KB × 2 blocks) of data flash alongside its 4 KB program ROM.
Which package type is used for the R5F211A1DSP#U0?
The R5F211A1DSP#U0 is packaged in a 20-pin molded-plastic LSSOP (PLSP0020JB-A), with 0.65 mm lead pitch and dimensions of 7.6 mm × 4.4 mm. This package is RoHS-compliant and optimized for automated surface-mount assembly.
Can the R5F211A1DSP#U0 operate from a 3.3 V supply?
Yes, the R5F211A1DSP#U0 operates across 2.7 V to 5.5 V, making it fully compatible with 3.3 V systems. At 3.0 V and 10 MHz operation, typical current consumption is 5 mA (active), 35 µA (wait mode), and 0.7 µA (stop mode), enabling robust low-voltage design.
How many analog input channels does the R5F211A1DSP#U0 support?
The R5F211A1DSP#U0 integrates a single 10-bit successive-approximation ADC with four analog input channels (AN8–AN11), mapped to pins P1_0 through P1_3. These pins also serve as key interrupt inputs and LED drive outputs, requiring careful functional assignment in software.
R5F211A1DSP#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:
- 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:
R5F211A1DSP#U0 FAQ
1.How can I place an order for R5F211A1DSP#U0 through Aetrix?
Please submit a Request for Quotation (RFQ) for R5F211A1DSP#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 R5F211A1DSP#U0 reliable?
The price and inventory of R5F211A1DSP#U0 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for R5F211A1DSP#U0 is usually 5 days.
3.What payment methods are accepted for R5F211A1DSP#U0?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for R5F211A1DSP#U0 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for R5F211A1DSP#U0?
R5F211A1DSP#U0 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your R5F211A1DSP#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 R5F211A1DSP#U0?
For technical support, including R5F211A1DSP#U0 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your R5F211A1DSP#U0 requirements.
6.How does Aetrix verify that R5F211A1DSP#U0 is sourced from the original manufacturer or authorized distributors?
All R5F211A1DSP#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 R5F211A1DSP#U0 meets industry standards.
7.What is the process for return or replacement of R5F211A1DSP#U0?
All R5F211A1DSP#U0 units undergo pre-shipment inspection (PSI). If there is an issue with R5F211A1DSP#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 R5F211A1DSP#U0 part is unused and in its original packaging.
Return procedure for R5F211A1DSP#U0:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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