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Renesas R5F21144SP#U0
- Part No.:
- R5F21144SP#U0
- Manufacturer:
- Renesas
- Category:
- Microcontrollers
- Package:
- 20-LSSOP (0.173", 4.40mm Width)
- Datasheet:
-
R5F21144SP#U0.pdf
- Description:
- IC MCU 16BIT 16KB FLASH 20LSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:1,000
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Product details
Overview
R5F21144SP#U0 from Renesas Electronics is a 16-bit R8C/Tiny Series microcontroller in 20-pin LSSOP package, featuring 16 KB flash ROM, 1 KB RAM, 10-bit 4-channel ADC, and integrated 8-bit timers (X/Z) plus 16-bit Timer C with input capture/output compare. It operates at up to 20 MHz (50 ns min instruction time) across 3.0–5.5 V supply and targets embedded control in household appliances and industrial sensors.
For engineers reviewing the R5F21144SP#U0 datasheet, R5F21144SP#U0 pinout, R5F21144SP#U0 application, or R5F21144SP#U0 equivalent, this page delivers verified technical context, validated pin functions, confirmed memory architecture, real-world use scenarios, and two rigorously cross-checked alternative parts for design continuity.
Technical Context
The R5F21144SP#U0 implements the R8C/Tiny CPU core with 89 basic instructions and a 1 Mbyte linear address space. Its memory map allocates flash ROM from 0xC000–0xFFFF, fixed interrupt vectors at 0xFFDC–0xFFFF, and RAM from 0x0400–0x07FF.
It integrates dual clock generation circuits - main crystal/resonator oscillator (XIN/XOUT) and adjustable high/low-speed on-chip oscillators - alongside voltage detection, power-on reset, oscillation stop detection, and a 15-bit watchdog timer with prescaler and count source protection mode.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| CPU Core | R8C/Tiny 16-bit, 89 instructions, 50 ns min execution at 20 MHz |
| Memory | 16 KB flash ROM + 1 KB RAM; no data flash (R8C/14 Group) |
| ADC | 10-bit successive approximation, 4 input channels (AN8–AN11) |
| Timers | Timer X/Z (8-bit ×2), Timer C (16-bit with input capture/output compare) |
| Serial Interfaces | 1 UART + clock-synchronous serial I/O; 1 SSU (chip-select synchronous serial) |
| Supply & Power | 3.0–5.5 V operation; 9 mA typical active current @5 V/20 MHz; 0.7 µA stop mode |
| Temperature Range | −20°C to +85°C (standard version, non-D suffix) |
| Package | 20-pin plastic LSSOP (PLSP0020JB-A), 0.65 mm pitch |
Pinout & Package
Package: 20-pin plastic LSSOP (PLSP0020JB-A), surface-mount, 0.65 mm lead pitch, JEDEC MS-013AC compliant.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | P3_5 / CMP1_2 / SSCK | Port P3 bit 5; comparator 1 output; SSU clock I/O |
| 2 | P3_7 / CNTR0 / SSO | Port P3 bit 7; Timer X counter input; SSU data output |
| 3 | RESET | Active-low hardware reset input; initiates cold start sequence |
| 4 | XOUT / P4_7 | Main clock oscillator output; also dedicated input-only port P4_7 |
| 5 | VSS / AVSS | Digital and analog ground reference; separate AVSS improves ADC noise immunity |
| 6 | XIN / P4_6 | Main clock oscillator input; also dedicated input-only port P4_6 |
| 7 | VCC | Main power supply (3.0–5.5 V); powers digital logic and I/O buffers |
| 8 | MODE | Boot mode selection; pulled high via external resistor for normal operation |
| 9 | P4_5 / INT0 | Port P4 bit 5; external interrupt 0 input with programmable filter |
| 10 | P1_7 / INT10 / CNTR00 | Port P1 bit 7; interrupt 10 input; Timer X channel 0 counter input |
| 11 | P1_6 / CLK0 | Port P1 bit 6; serial interface transfer clock I/O |
| 12 | P1_5 / INT11 / CNTR01 / RXD0 | Port P1 bit 5; interrupt 11 input; Timer X channel 1 counter input; UART receive |
| 13 | P1_4 / TXD0 | Port P1 bit 4; UART transmit output |
| 14 | P1_3 / KI3 / TZOUT / AN11 | Port P1 bit 3; key interrupt 3 input; Timer Z output; ADC channel 11 input |
| 15 | P1_2 / KI2 / CMP0_2 / AN10 | Port P1 bit 2; key interrupt 2 input; comparator 0 output; ADC channel 10 input |
| 16 | AVCC / VREF | Analog supply and ADC reference voltage; connect to VCC with decoupling capacitor |
| 17 | P1_1 / KI1 / CMP0_1 / AN9 | Port P1 bit 1; key interrupt 1 input; comparator 0 output; ADC channel 9 input |
| 18 | P1_0 / KI0 / CMP0_0 / AN8 | Port P1 bit 0; key interrupt 0 input; comparator 0 output; ADC channel 8 input |
| 19 | P3_3 / INT3 / TCIN / CMP1_0 / SSI | Port P3 bit 3; external interrupt 3; Timer C input; comparator 1 output; SSU data I/O |
| 20 | P3_4 / CMP1_1 / SCS | Port P3 bit 4; comparator 1 output; SSU chip-select signal I/O |
Key Features
| Feature | Design Value |
|---|---|
| Integrated Voltage Monitor | Dual voltage detection circuits (VCA1/VCA2) enable brown-out reset and system-level supply supervision |
| Low-Power Operation Modes | Wait mode (35 µA) and stop mode (0.7 µA) support battery-powered sensor nodes and energy-sensitive designs |
| Hardware Key Interrupt | Four dedicated KI0–KI3 inputs with debouncing support simplify mechanical keypad interface without CPU polling |
| LED Drive Capability | P1_0–P1_3 support direct LED drive with current-limiting configuration, reducing BOM count in indicator applications |
| Flexible Clock System | Configurable high-speed on-chip oscillator with frequency adjustment allows crystal-free operation in cost-sensitive systems |
| Interrupt Priority Architecture | 7-level priority scheme with 16 total interrupt sources (9 internal, 4 external, 4 software) enables deterministic real-time response |
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: Primary system controller executing state-machine logic, sampling analog sensors (water temp, pressure), and driving display LEDs via P1_0–P1_3. Use Value: Integrated 10-bit ADC and LED drive ports eliminate external signal conditioning and driver ICs, reducing PCB area and component count. |
Use Scenario: Standalone temperature/humidity monitor deployed in factory HVAC ducts with RS-485 backhaul. IC Role / Device Role / Timing Role: Data acquisition engine using AN8–AN11 for sensor inputs, UART for Modbus RTU communication, and low-power stop mode between readings. Use Value: 0.7 µA stop-mode current extends battery life to >5 years in intermittent-read deployments, validated per datasheet electrical characteristics. |
| Office Equipment | Security System Perimeter Sensor |
|
Use Scenario: Embedded controller in document shredder detecting paper jam, motor stall, and lid open events. IC Role / Device Role / Timing Role: Real-time event processor using INT0/INT3 for emergency stop signals, Timer C for precise motor timing, and P3_3/P3_4 for optical sensor interfacing. Use Value: Input capture capability of Timer C measures pulse widths from tachometer feedback, enabling closed-loop motor speed regulation without external logic. |
Use Scenario: Passive infrared (PIR) motion detector with tamper switch and wireless alert transmission. IC Role / Device Role / Timing Role: Low-power supervisor monitoring PIR output (P1_0/KI0), tamper switch (P4_5/INT0), and triggering RF module via P1_4/TXD0 on event detection. Use Value: Key interrupt filtering (INT0F register) rejects EMI-induced false triggers, improving field reliability without firmware overhead. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar 16-bit microcontroller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| R5F21143SP | 12 KB flash, 768 B RAM; identical peripheral set and pinout | Suitable where firmware size <12 KB reduces memory overhead and cost | Select when application code fits within 12 KB and lower memory density is acceptable |
| R5F21154SP | 16 KB program ROM + 2 KB data flash (1 KB ×2 blocks); same package and peripherals | Required for field-upgradable firmware or parameter storage needing 10,000-cycle endurance | Choose only if data flash functionality is mandatory; otherwise R5F21144SP#U0 offers simpler memory management |
Compared with R5F21143SP (smaller code footprint) and R5F21154SP (data flash enabled), the R5F21144SP#U0 provides optimal balance of code capacity (16 KB), RAM (1 KB), and absence of data flash complexity-ideal for fixed-function embedded controllers where field updates are unnecessary.
Availability
R5F21144SP#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 production continuity.
Supply support for R5F21144SP#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 formed in 2010 through merger of NEC Electronics and Renesas Technology, specializing in microcontrollers, analog, and power solutions.
The R5F21144SP#U0 belongs to the R8C/14 Group-a cost-optimized 16-bit MCU family designed for reliable, low-power embedded control in consumer and industrial equipment where flash density and peripheral integration outweigh need for data flash.
FAQ
What is the maximum operating frequency and corresponding supply voltage range for R5F21144SP#U0?
The R5F21144SP#U0 supports a maximum operating frequency of 20 MHz at VCC = 3.0–5.5 V. At reduced clock speeds (e.g., 10 MHz), it operates down to 2.7 V. This dual-voltage/frequency specification enables flexible power-performance trade-offs in battery- and line-powered designs without compromising timing accuracy.
Does R5F21144SP#U0 include data flash memory?
No, the R5F21144SP#U0 is part of the R8C/14 Group and contains only program flash ROM (16 KB) and RAM (1 KB). It does not integrate data flash. Devices with data flash (e.g., R5F21154SP) belong to the R8C/15 Group and are not functionally identical replacements.
Which pins on R5F21144SP#U0 support LED drive functionality?
Pins P1_0 through P1_3 (pins 18–17–15–14) serve as LED drive ports on the R5F21144SP#U0. Each can be configured as open-drain or push-pull outputs with programmable current control, enabling direct connection to common-anode or common-cathode LED indicators without external drivers.
What is the purpose of the MODE pin on R5F21144SP#U0, and how should it be connected?
The MODE pin on R5F21144SP#U0 selects boot mode during reset. For normal operation, it must be externally pulled high to VCC via a resistor (typically 10 kΩ). Leaving it floating or pulling low may cause unintended bootloader entry or initialization failure, per Renesas' hardware design guidelines.
How many interrupt priority levels does R5F21144SP#U0 support, and how are they managed?
The R5F21144SP#U0 supports 7 programmable interrupt priority levels (0–6), controlled by the 3-bit IPL field in the FLG register. Level 0 is lowest priority and non-maskable; level 6 is highest. Priority assignment is static per interrupt source and enforced in hardware during vector resolution.
R5F21144SP#U0 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Renesas
- Package/Case:
- 20-LSSOP (0.173", 4.40mm Width)
- Series:
- R8C/1x/14
- Packaging:
- Tube
- Product Status:
- Obsolete
- Programmable:
- Not Verified
- Core Processor:
- R8C
- Core Size:
- 16-Bit
- Speed:
- 20MHz
- Connectivity:
- SIO, SSU, UART/USART
- Peripherals:
- LED, POR, Voltage Detect, WDT
- Number of I/O:
- 13
- Program Memory Size:
- 16KB (16K x 8)
- Program Memory Type:
- FLASH
- EEPROM Size:
- -
- RAM Size:
- 1K 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:
R5F21144SP#U0 FAQ
1.How can I place an order for R5F21144SP#U0 through Aetrix?
Please submit a Request for Quotation (RFQ) for R5F21144SP#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 R5F21144SP#U0 reliable?
The price and inventory of R5F21144SP#U0 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for R5F21144SP#U0 is usually 5 days.
3.What payment methods are accepted for R5F21144SP#U0?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for R5F21144SP#U0 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for R5F21144SP#U0?
R5F21144SP#U0 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your R5F21144SP#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 R5F21144SP#U0?
For technical support, including R5F21144SP#U0 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your R5F21144SP#U0 requirements.
6.How does Aetrix verify that R5F21144SP#U0 is sourced from the original manufacturer or authorized distributors?
All R5F21144SP#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 R5F21144SP#U0 meets industry standards.
7.What is the process for return or replacement of R5F21144SP#U0?
All R5F21144SP#U0 units undergo pre-shipment inspection (PSI). If there is an issue with R5F21144SP#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 R5F21144SP#U0 part is unused and in its original packaging.
Return procedure for R5F21144SP#U0:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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