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Renesas R5F21292SDSP#W4
- Part No.:
- R5F21292SDSP#W4
- Manufacturer:
- Renesas
- Category:
- Microcontrollers
- Package:
- 20-LSSOP (0.173", 4.40mm Width)
- Datasheet:
-
R5F21292SDSP#W4.pdf
- Description:
- IC MCU 16BIT 8KB FLASH 20LSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:4,494
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Product details
Overview
R5F21292SDSP#W4 from Renesas Electronics is a 16-bit single-chip microcontroller in the R8C/29 Group, featuring an R8C CPU core, 8 KB program flash, dual 1 KB data flash blocks, 512 bytes RAM, and operation at -40°C to +85°C. It integrates UART0/UART1, I²C, LIN, 10-bit 4-channel ADC, four 8/16-bit timers, and operates from 2.2 V to 5.5 V. It targets embedded control in industrial sensors and appliance subsystems.
For engineers reviewing the R5F21292SDSP#W4 datasheet, R5F21292SDSP#W4 pinout, R5F21292SDSP#W4 application, or R5F21292SDSP#W4 equivalent, key selection criteria include its D-version temperature grade (-40°C to +85°C), dual-block data flash (1 KB × 2) for firmware parameter storage, LSSOP-20 package compatibility, and hardware LIN support via Timer RA and UART0.
Technical Context
The R5F21292SDSP#W4 implements the R8C CPU core with 89 fundamental instructions and executes at 50 ns minimum instruction time (20 MHz XIN, 3.0–5.5 V). Its memory architecture separates 8 KB program ROM from two independent 1 KB data flash blocks-enabling simultaneous code execution and nonvolatile parameter updates without halting operation.
Peripheral integration includes UART0 (clock-synchronous serial I/O + UART), UART1 (UART-only), I²C bus interface, hardware LIN module (using Timer RA and UART0), 10-bit 4-channel A/D converter, and four timer units (RA/RB: 8-bit; RC: 16-bit input-capture/output-compare; RE: real-time clock with compare match).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| CPU Core | R8C 16-bit CISC core with 89 instructions and register bank switching |
| Program Memory | 8 KB on-chip flash ROM - stores executable firmware with 1,000 erase/write cycles |
| Data Flash | 1 KB × 2 independent blocks - enables wear-leveling and background reprogramming of calibration/data |
| RAM | 512 bytes SRAM - supports stack, variables, and interrupt context storage |
| Operating Voltage | 2.2 V to 5.5 V - supports direct interface with 3.3 V and 5 V logic domains |
| Temperature Range | -40°C to +85°C (D version) - qualified for industrial ambient environments |
| Package | 20-pin LSSOP (PLSP0020JB-A) - surface-mount, 0.65 mm pitch, JEDEC MS-013AC compliant |
Pinout & Package
Package: 20-pin molded-plastic LSSOP (PLSP0020JB-A), 7.6 mm × 4.4 mm body, 0.65 mm lead pitch, exposed pad not present.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| P1_0 / KI0 / AN8 | Multi-function I/O | Key interrupt input, analog input channel 8, or general-purpose CMOS I/O |
| P1_1 / KI1 / AN9 / TRCIOA / TRCTRG | Multi-function I/O | Key interrupt, analog input 9, timer RC input-capture A, or external trigger source |
| VREF / P4_2 | Analog reference input | External voltage reference for 10-bit A/D converter - sets full-scale range |
| P3_4 / SDA / SCS / TRCIOC | Multi-function I/O | I²C data line, chip-select for synchronous serial, or timer RC input-capture C |
| P3_5 / SCL / SSCK / TRCIOD | Multi-function I/O | I²C clock line, synchronous serial clock, or timer RC input-capture D |
| RESET | Active-low reset input | Asynchronous hardware reset - must be held low ≥ 100 ns to initiate reset sequence |
| XIN / XCIN / P4_6 | Crystal/resonator input | Primary system clock (XIN) or 32 kHz RTC crystal (XCIN) - only active in N/D versions |
| XOUT / XCOUT / P4_7 | Crystal/resonator output | Oscillator output - paired with XIN/XCIN; open-drain when used as external clock input |
Key Features
| Feature | Design Value |
|---|---|
| Dual independent data flash blocks | Enables concurrent firmware execution and nonvolatile parameter update - no code stop required |
| Hardware LIN 2.0 module | Integrated LIN protocol engine using Timer RA and UART0 - reduces host CPU overhead for automotive body electronics |
| Real-time clock (Timer RE) | Low-power RTC with compare match - maintains timekeeping in wait/stop modes using 32 kHz XCIN |
| 10-bit 4-channel A/D converter | Single-slope conversion with internal reference option - supports sensor signal acquisition at ≤ 10 µs per channel |
| LED drive capability (P1_0–P1_7) | CMOS I/O ports configured for constant-current sink up to 20 mA - eliminates external drivers in display interfaces |
Applications
| Industrial Sensor Node | Smart Appliance Control |
|---|---|
Use Scenario: Standalone temperature/humidity sensor node with local data logging and UART-based reporting. IC Role / Device Role / Timing Role: Main controller executing sensor polling, ADC sampling, data flash storage, and UART transmission scheduling. Use Value: Dual data flash blocks allow continuous logging while firmware reads prior records - no interruption to measurement cycle. |
Use Scenario: Cooktop control panel managing touch inputs, thermal protection, and LED status indicators. IC Role / Device Role / Timing Role: System-on-chip handling key interrupts, PWM-driven LED dimming, and real-time thermal monitoring via ADC. Use Value: Integrated LED drive ports (P1_0–P1_7) directly sink current for 8-segment displays - reduces BOM count by 8 discrete drivers. |
| Automotive Body Controller | Office Equipment Subsystem |
Use Scenario: Door module controlling window lift, mirror adjustment, and interior lighting via LIN bus. IC Role / Device Role / Timing Role: LIN master node coordinating slave devices using hardware LIN module and UART0. Use Value: Hardware LIN offloads protocol framing, checksum, and synchronization - frees CPU for application logic and diagnostics. |
Use Scenario: Document feeder subsystem in multifunction printers requiring precise motor timing and paper jam detection. IC Role / Device Role / Timing Role: Real-time motion controller using Timer RC input-capture for encoder feedback and Timer RA for stepper phase timing. Use Value: 16-bit Timer RC provides 65,536-count resolution for high-accuracy speed/position control at ≤ 1 µs timing granularity. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar 16-bit microcontroller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| R5F21292SNSP | N-version (-20°C to +85°C); identical peripherals and memory map but lower temperature rating | Suitable for commercial indoor equipment where extended temperature range is unnecessary | Select when cost sensitivity outweighs industrial ambient requirements |
| R5F21294SDSP | D-version with 16 KB program ROM and same dual 1 KB data flash - 8 KB more code space | Required for applications needing larger firmware image (e.g., bootloader + application + OTA update partition) | Choose when future firmware expansion or secure boot implementation demands >8 KB ROM |
Compared with R5F21292SNSP, the R5F21292SDSP#W4 adds industrial-grade temperature tolerance and identical data flash functionality; compared with R5F21294SDSP, it trades 8 KB ROM for lower cost and smaller footprint in resource-constrained designs.
Availability
R5F21292SDSP#W4 is available at Aetrix Electronics and suitable for industrial sensor nodes, smart appliance control modules, and automotive body electronics requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for R5F21292SDSP#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 infrastructure markets.
The R8C/29 Group, including the R5F21292SDSP#W4, was designed for cost-sensitive, low-power embedded control applications requiring integrated analog peripherals, nonvolatile data storage, and communication interfaces like LIN and I²C.
FAQ
What is the maximum operating frequency and corresponding supply voltage range for the R5F21292SDSP#W4?
The R5F21292SDSP#W4 achieves a minimum instruction execution time of 50 ns at 20 MHz XIN clock frequency, requiring VCC = 3.0 V to 5.5 V. At lower frequencies (e.g., 10 MHz), it supports down to 2.7 V, and at 5 MHz, operation is guaranteed from 2.2 V - enabling flexible power domain design across 3.3 V and 5 V systems.
Does the R5F21292SDSP#W4 support hardware LIN communication, and how is it implemented?
Yes, the R5F21292SDSP#W4 includes a dedicated hardware LIN 2.0 module that uses Timer RA for baud rate generation and UART0 for frame transmission/reception. This offloads LIN protocol handling (break detection, sync field, checksum calculation) from the CPU, ensuring deterministic timing and reducing firmware overhead in automotive body electronics applications.
How many data flash blocks does the R5F21292SDSP#W4 have, and what is their endurance rating?
The R5F21292SDSP#W4 contains two independent 1 KB data flash blocks, each rated for 10,000 program/erase cycles. This allows wear-leveling across blocks and enables background reprogramming - critical for storing calibration data, device configuration, or usage logs without halting main application execution.
What is the function of the XCIN/XCOUT pins on the R5F21292SDSP#W4, and are they available in all versions?
The XCIN and XCOUT pins support a 32 kHz crystal oscillator for the real-time clock (Timer RE) and are functional only in N- and D-version devices like the R5F21292SDSP#W4. They are not available in J/K versions. When enabled, this circuit provides low-power timekeeping during wait and stop modes with typical current draw of 2.0 µA (wait) or 0.7 µA (stop).
Can the R5F21292SDSP#W4's I/O ports drive LEDs directly, and which pins support this capability?
Yes, the R5F21292SDSP#W4's P1_0 through P1_7 ports support LED drive functionality in N- and D-versions, providing CMOS output with sink capability up to 20 mA per pin. This eliminates the need for external transistor drivers in status indicator or segmented display applications - confirmed in the "LED drive ports" specification for D-version devices.
R5F21292SDSP#W4 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Renesas
- Package/Case:
- 20-LSSOP (0.173", 4.40mm Width)
- Series:
- R8C/2x/29
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Programmable:
- Not Verified
- Core Processor:
- R8C
- Core Size:
- 16-Bit
- Speed:
- 20MHz
- Connectivity:
- I2C, LINbus, SIO, SSU, UART/USART
- Peripherals:
- LED, POR, Voltage Detect, WDT
- Number of I/O:
- 13
- Program Memory Size:
- 8KB (8K x 8)
- Program Memory Type:
- FLASH
- EEPROM Size:
- 2K x 8
- RAM Size:
- 512 x 8
- Voltage - Supply (Vcc/Vdd):
- 2.2V ~ 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:
R5F21292SDSP#W4 FAQ
1.How can I place an order for R5F21292SDSP#W4 through Aetrix?
Please submit a Request for Quotation (RFQ) for R5F21292SDSP#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 R5F21292SDSP#W4 reliable?
The price and inventory of R5F21292SDSP#W4 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for R5F21292SDSP#W4 is usually 5 days.
3.What payment methods are accepted for R5F21292SDSP#W4?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for R5F21292SDSP#W4 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for R5F21292SDSP#W4?
R5F21292SDSP#W4 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your R5F21292SDSP#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 R5F21292SDSP#W4?
For technical support, including R5F21292SDSP#W4 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your R5F21292SDSP#W4 requirements.
6.How does Aetrix verify that R5F21292SDSP#W4 is sourced from the original manufacturer or authorized distributors?
All R5F21292SDSP#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 R5F21292SDSP#W4 meets industry standards.
7.What is the process for return or replacement of R5F21292SDSP#W4?
All R5F21292SDSP#W4 units undergo pre-shipment inspection (PSI). If there is an issue with R5F21292SDSP#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 R5F21292SDSP#W4 part is unused and in its original packaging.
Return procedure for R5F21292SDSP#W4:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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