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Renesas R5F2M121ADSP#W4
- Part No.:
- R5F2M121ADSP#W4
- Manufacturer:
- Renesas
- Category:
- Microcontrollers
- Package:
- 20-LSSOP (0.173", 4.40mm Width)
- Datasheet:
-
R5F2M121ADSP#W4.pdf
- Description:
- IC MCU 16BIT 4KB FLASH 20LSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:4,658
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Product details
Overview
R5F2M121ADSP#W4 from Renesas is a 16-bit R8C CPU core microcontroller in the R8C/M12A Group, featuring 4 KB flash program ROM, 384 bytes RAM, 2 × 1 KB data flash blocks, 10-bit 6-channel A/D converter, UART0 serial interface, and dual comparator B circuits (B1/B3). It operates from 1.8 V to 5.5 V at up to 20 MHz (2.7–5.5 V) and supports -40 °C to +85 °C industrial temperature range.
For engineers reviewing the R5F2M121ADSP#W4 datasheet, R5F2M121ADSP#W4 pinout, R5F2M121ADSP#W4 application, or R5F2M121ADSP#W4 equivalent, key selection criteria include its 20-pin LSSOP package, 8 external interrupt inputs (INT × 4, KI × 4), 17 CMOS I/O ports with pull-up control, high-current drive capability on 8 pins, and integrated voltage detection (VDET0/VDET1) and watchdog timer with reset/start/periodic functions.
Technical Context
The R5F2M121ADSP#W4 implements the R8C CPU core with 89 fundamental instructions, 1 Mbyte address space, and hardware multiplier (16 × 16 → 32 bits) supporting multiply-accumulate operations. Its memory map allocates program ROM starting at 0E000h, data flash at 03000h–037FFh, and RAM at 00400h–0057Fh.
Peripheral integration includes Timer RJ2 (16-bit), Timer RB2 (8/16-bit selectable), Timer RC (16-bit with 4 capture/compare registers), UART0 supporting both clock-synchronous and asynchronous serial I/O, and two independent comparator B circuits with dedicated IVREF/IVCMP inputs and VCOUT outputs.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| CPU Core | R8C 16-bit core with 89 instructions, 1 Mbyte address space, and 16×16→32-bit hardware multiplier |
| Memory | 4 KB flash program ROM, 384 bytes RAM, 2 × 1 KB data flash blocks (10,000 erase/write cycles) |
| A/D Converter | 10-bit resolution, 6 input channels (AN0–AN4, AN7), sample-and-hold and sweep mode support |
| Operating Voltage | 1.8 V to 5.5 V supply; supports 20 MHz max frequency at 2.7–5.5 V, 5 MHz at 1.8–5.5 V |
| Temperature Range | -40 °C to +85 °C (D version), qualified for industrial environments without derating |
| Interrupt System | 69 interrupt vectors, 8 external interrupt inputs (INT0–INT3, KI0–KI3), 2 priority levels |
| Package | 20-pin LSSOP (PLSP0020JB-A), 0.65 mm pitch, surface-mount compatible |
Pinout & Package
Package: 20-pin 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 |
|---|---|---|
| 1 | P4_2/TRBO/TXD0/KI3 | CMOS I/O with timer RB2 output, UART0 transmit, and key interrupt input |
| 2 | P3_7/ADTRG/TRJO/TRCIOD | Analog trigger input for A/D conversion, timer RJ2 output, and trace I/O data |
| 3 | RESET/PA_0 | Active-low hardware reset input; also serves as general-purpose port PA_0 |
| 4 | P4_7/XOUT/INT2 | Clock oscillator output (XOUT) and external interrupt input INT2 |
| 5 | VSS/AVSS | Digital and analog ground reference; must be connected to common system ground |
| 6 | P4_6/XIN/RXD0/TXD0/INT1/VCOUT1/TRJIO | Primary clock input (XIN), UART0 RX/TX bidirectional, interrupt INT1, comparator B1 output, timer RJ2 I/O |
| 7 | VCC/AVCC | Digital and analog power supply (1.8–5.5 V); requires local decoupling capacitor |
| 8 | MODE | Mode select input; tied to VCC via resistor to enable single-chip operation |
| 9 | P3_5/TRCIOD/KI2/VCOUT3 | Trace I/O data, key interrupt KI2, and comparator B3 output |
| 10 | P3_4/IVREF3/TRCIOC/INT2 | Comparator B3 reference voltage input, timer RC I/O C, and shared INT2 input |
| 11 | P3_3/IVCMP3/TRCCLK/INT3 | Comparator B3 analog input, timer RC clock input, and external interrupt INT3 |
| 12 | P4_5/INT0/ADTRG | External interrupt INT0 and A/D conversion trigger input |
| 13 | P1_7/AN7/IVCMP1/INT1/TRJIO/TRCCLK | Analog input AN7, comparator B1 input, interrupt INT1, timer RJ2 I/O, timer RC clock |
| 14 | P1_6/IVREF1/CLK0/TRJO/TRCIOB | Comparator B1 reference input, serial clock I/O, timer RJ2 output, timer RC I/O B |
| 15 | P1_5/RXD0/TRJIO/INT1/VCOUT1 | UART0 receive, timer RJ2 I/O, interrupt INT1, comparator B1 output |
| 16 | P1_4/AN4/TXD0/RXD0/INT0/TRCIOB | Analog input AN4, UART0 TX/RX bidirectional, interrupt INT0, timer RC I/O B |
| 17 | P1_3/AN3/TRCIOC/KI3/TRBO | Analog input AN3, timer RC I/O C, key interrupt KI3, timer RB2 output |
| 18 | P1_2/AN2/TRCIOB/KI2 | Analog input AN2, timer RC I/O B, key interrupt KI2 |
| 19 | P1_1/AN1/TRCIOA/TRCTRG/KI1 | Analog input AN1, timer RC I/O A, external trigger input, key interrupt KI1 |
| 20 | P1_0/AN0/TRCIOD/KI0 | Analog input AN0, trace I/O data, key interrupt KI0 |
Key Features
| Feature | Design Value |
|---|---|
| Integrated Data Flash | 2 × 1 KB blocks enable field firmware updates and parameter storage without external EEPROM |
| EMI/EMS Optimized Design | On-chip layout and power management features reduce radiated emissions and improve immunity per IEC 61000-4 standards |
| Multi-Source Clock System | XIN crystal oscillator, high-speed on-chip oscillator (adjustable 18.432 MHz), and low-speed on-chip oscillator support flexible timing and low-power modes |
| Configurable I/O Drive Strength | 8 high-current drive ports support direct LED driving or higher-load interfacing without external buffers |
| Dual Independent Comparators | Comparator B1 and B3 operate simultaneously with separate reference and input pins, enabling dual-threshold monitoring |
| Power Control Modes | Wait mode (CPU halted, peripherals active) and Stop mode (full shutdown) reduce current to µA-levels for battery operation |
Applications
| Home Appliance Control | Office Equipment Motor Control |
|---|---|
Use Scenario: Microcontroller in washing machine main control board managing water valve, motor driver, and user interface. IC Role / Device Role / Timing Role: Primary system controller executing real-time motor sequencing, A/D sensing of load weight and temperature, and UART communication with display module. Use Value: Integrated 6-channel A/D and dual comparators allow simultaneous monitoring of temperature, pressure, and current feedback without external signal conditioning. | Use Scenario: Embedded controller in multifunction printer managing paper feed stepper motor, toner sensor, and panel buttons. IC Role / Device Role / Timing Role: Real-time motion controller using Timer RC PWM outputs for motor phase timing and KI interrupts for mechanical switch debouncing. Use Value: 8-key interrupt inputs (KI0–KI3) and 17 programmable CMOS I/Os eliminate need for external GPIO expanders in compact designs. |
| Consumer Audio Signal Routing | Industrial Sensor Interface Module |
Use Scenario: Digital audio mixer front-end handling analog input switching, gain control, and status LED drivers. IC Role / Device Role / Timing Role: Analog signal manager using A/D channels for potentiometer position sensing and comparator B circuits for clip detection on audio paths. Use Value: Dedicated IVREF/IVCMP pins and VCOUT outputs enable fast, autonomous overvoltage detection without CPU intervention. | Use Scenario: DIN-rail mounted sensor node converting thermistor, RTD, and digital switch inputs into Modbus RTU over UART. IC Role / Device Role / Timing Role: Isolated sensor aggregator performing cold-junction compensation, linearization, and protocol framing using internal data flash for calibration coefficients. Use Value: -40 °C to +85 °C operating range and voltage detection circuit ensure reliable operation in unconditioned industrial enclosures. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microcontroller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| R5F2M121ANSP | Same R8C/M12A core, 4 KB ROM, 384 bytes RAM, but rated for -20 °C to +85 °C (N version) | Limited to commercial/office environments; lacks extended low-temperature operation | Select when ambient temperature remains above -20 °C and cost sensitivity outweighs industrial qualification |
| R5F2M122ADSP | Pin-compatible upgrade with 8 KB program ROM and 512 bytes RAM; identical peripheral set and package | Supports larger firmware images and more complex state machines without hardware change | Choose for future-proofing or when application logic exceeds 4 KB code space |
Compared with R5F2M121ANSP, the R5F2M121ADSP#W4 enables deployment in colder industrial settings; compared with R5F2M122ADSP, it offers optimal cost/performance balance for mid-complexity control tasks within 4 KB code footprint.
Availability
R5F2M121ADSP#W4 is available at Aetrix Electronics and suitable for home appliance control, office equipment motor control, consumer audio signal routing, and industrial sensor interface modules requiring stable component supply across long production lifecycles.
Supply support for R5F2M121ADSP#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 automotive, industrial, and IoT markets.
The R8C/M12A Group, including R5F2M121ADSP#W4, was designed for cost-sensitive, low-power embedded control in consumer and industrial appliances where integration, EMI robustness, and temperature resilience are critical.
FAQ
What is the maximum operating frequency of the R5F2M121ADSP#W4 and under what voltage conditions?
The R5F2M121ADSP#W4 achieves a maximum operating frequency of 20 MHz when powered at 2.7 V to 5.5 V. At lower supply voltages (1.8 V to 5.5 V), the maximum guaranteed frequency is 5 MHz. This dual-frequency specification allows flexible power/performance trade-offs in battery-powered or wide-input-voltage applications without changing the R5F2M121ADSP#W4 part number.
Does the R5F2M121ADSP#W4 support in-circuit debugging and flash programming?
Yes, the R5F2M121ADSP#W4 includes on-chip debug functionality and on-board flash rewrite capability. It supports standard Renesas E1/E20 debug interfaces and allows full firmware updates in-system without requiring external programming hardware - a key feature confirmed in the R01DS0010EJ0200 datasheet section 1.4.
How many analog input channels does the A/D converter in the R5F2M121ADSP#W4 support, and what is their resolution?
The R5F2M121ADSP#W4 integrates a 10-bit successive-approximation A/D converter with six analog input channels: AN0 through AN4 and AN7. All channels share the same 10-bit resolution and support sample-and-hold and sweep conversion modes, enabling simultaneous multi-sensor acquisition in applications like temperature and voltage monitoring.
What are the key differences between the R5F2M121ADSP#W4 and the R5F2M111ADSP?
The R5F2M121ADSP#W4 belongs to the R8C/M12A Group (20-pin), while R5F2M111ADSP is in the R8C/M11A Group (14-pin). Key differences include: 20 vs. 14 pins, 8 vs. 6 external interrupts, 6 vs. 5 A/D channels, inclusion of Comparator B3 (absent in M11A), and additional I/O ports (P3_3/P3_4/P3_5/P4_2/P4_5) enabled in the R5F2M121ADSP#W4.
Is the R5F2M121ADSP#W4 RoHS compliant and what is its moisture sensitivity level (MSL)?
Yes, the R5F2M121ADSP#W4 is RoHS compliant per Renesas standard product policy. Its moisture sensitivity level is MSL3, requiring floor life management per J-STD-020 - consistent with the PLSP0020JB-A package specification and confirmed in Renesas packaging documentation for R8C/M12A devices.
R5F2M121ADSP#W4 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Renesas
- Package/Case:
- 20-LSSOP (0.173", 4.40mm Width)
- Series:
- R8C/Mx/12A
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Programmable:
- Not Verified
- Core Processor:
- R8C
- Core Size:
- 16-Bit
- Speed:
- 20MHz
- Connectivity:
- UART/USART
- Peripherals:
- POR, PWM, Voltage Detect, WDT
- Number of I/O:
- 17
- Program Memory Size:
- 4KB (4K x 8)
- Program Memory Type:
- FLASH
- EEPROM Size:
- -
- RAM Size:
- 384 x 8
- Voltage - Supply (Vcc/Vdd):
- 1.8V ~ 5.5V
- Data Converters:
- A/D 6x10b
- Oscillator Type:
- Internal
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
R5F2M121ADSP#W4 FAQ
1.How can I place an order for R5F2M121ADSP#W4 through Aetrix?
Please submit a Request for Quotation (RFQ) for R5F2M121ADSP#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 R5F2M121ADSP#W4 reliable?
The price and inventory of R5F2M121ADSP#W4 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for R5F2M121ADSP#W4 is usually 5 days.
3.What payment methods are accepted for R5F2M121ADSP#W4?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for R5F2M121ADSP#W4 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for R5F2M121ADSP#W4?
R5F2M121ADSP#W4 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your R5F2M121ADSP#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 R5F2M121ADSP#W4?
For technical support, including R5F2M121ADSP#W4 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your R5F2M121ADSP#W4 requirements.
6.How does Aetrix verify that R5F2M121ADSP#W4 is sourced from the original manufacturer or authorized distributors?
All R5F2M121ADSP#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 R5F2M121ADSP#W4 meets industry standards.
7.What is the process for return or replacement of R5F2M121ADSP#W4?
All R5F2M121ADSP#W4 units undergo pre-shipment inspection (PSI). If there is an issue with R5F2M121ADSP#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 R5F2M121ADSP#W4 part is unused and in its original packaging.
Return procedure for R5F2M121ADSP#W4:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
R5F2M121ADSP#W4 Tags
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