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Renesas R5F2M121ANSP#W4
- Part No.:
- R5F2M121ANSP#W4
- Manufacturer:
- Renesas
- Category:
- Microcontrollers
- Package:
- 20-LSSOP (0.173", 4.40mm Width)
- Datasheet:
-
R5F2M121ANSP#W4.pdf
- Description:
- IC MCU 16BIT 4KB FLASH 20LSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:2,832
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Product details
Overview
R5F2M121ANSP from Renesas Electronics is a 16-bit R8C CPU core microcontroller in the R8C/M12A Group, featuring 4 KB flash program ROM, 384 bytes RAM, and dual 1 KB data flash blocks. It delivers 50 ns minimum instruction execution at 20 MHz (VCC = 2.7–5.5 V), integrates a 16×16→32-bit hardware multiplier, and supports 6-channel 10-bit A/D conversion with sample-and-hold. It targets embedded control in home appliances and audio equipment.
For engineers reviewing the R5F2M121ANSP datasheet, R5F2M121ANSP pinout, R5F2M121ANSP application, or R5F2M121ANSP equivalent, key selection criteria include its 20-pin LSSOP package (PLSP0020JB-A), -20°C to +85°C operating range (N version), 8 external interrupt inputs (INT × 4, KI × 4), and integrated UART0 with clock-synchronous/asynchronous serial I/O capability.
Technical Context
The R5F2M121ANSP implements the R8C CPU core with 89 fundamental instructions and two register banks (R0–R3, A0–A1, FB, USP/ISP), supporting 20-bit addressing across a 1 Mbyte space. Its memory map allocates program ROM starting at 0F000h, 384-byte RAM at 00400h, and dual 1 KB data flash blocks at 03000h–037FFh.
Peripheral integration includes Timer RJ2 (16-bit), Timer RB2 (8/16-bit selectable), Timer RC (16-bit with 4 capture/compare registers), UART0, 6-channel 10-bit A/D converter, two comparator B circuits (B1/B3), and voltage detection with dual thresholds. Power management supports wait and stop modes for low-power operation.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| CPU Core | R8C 16-bit core with 89 instructions, 1 Mbyte address space, 50 ns min. instruction time at 20 MHz |
| Memory | 4 KB flash program ROM, 384 bytes RAM, 2 × 1 KB data flash blocks for nonvolatile parameter storage |
| A/D Converter | 10-bit resolution × 6 channels with sample-and-hold and sweep mode for sensor acquisition |
| Timers | Timer RJ2 (16-bit), Timer RB2 (8/16-bit PWM/one-shot), Timer RC (16-bit with 4 compare/capture registers) |
| Serial Interface | UART0 supporting both clock-synchronous and asynchronous serial I/O (RXD0/TXD0) |
| Operating Range | -20°C to +85°C ambient temperature, 1.8 V to 5.5 V supply voltage |
| Interrupts | 69 interrupt vectors, 8 external interrupt inputs (INT0–INT3, KI0–KI3), 2 priority levels |
Pinout & Package
Package: 20-pin LSSOP (PLSP0020JB-A), 0.65 mm pitch, body size 7.6 × 4.9 mm, lead count 20, RoHS-compliant surface-mount package optimized for compact consumer electronics PCBs.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| P1_0 | A/D input / key interrupt / timer I/O | Analog input AN0, key interrupt KI0, and TRCIOD timer signal - enables direct sensor or button interface without external components |
| P4_5 | External A/D trigger / interrupt | ADTRG input synchronizes A/D conversion start with external events (e.g., motor commutation edge), also serves as INT0 |
| P3_3 | Comparator B3 input / interrupt | IVCMP3 analog input for comparator B3, plus INT3 interrupt - supports overvoltage/undervoltage fault detection with immediate CPU response |
| P3_4 | Comparator B3 reference / interrupt | IVREF3 reference input for comparator B3, plus INT2 - allows programmable threshold setting for precision analog monitoring |
| P3_5 | Comparator B3 output / key interrupt | VCOUT3 output reflects B3 comparison result, also functions as KI2 - enables direct LED drive or logic-level fault signaling |
| XIN/XOUT | Crystal oscillator interface | Supports external crystal (1–20 MHz) or ceramic resonator; XIN accepts external clock source when XOUT is repurposed as I/O |
Key Features
| Feature | Design Value |
|---|---|
| Hardware multiplier | 16 × 16 → 32-bit multiply and 16 × 16 + 32 → 32-bit MAC enable real-time motor control and digital filtering without software overhead |
| Dual data flash blocks | Two independent 1 KB blocks allow background reprogramming of one block while executing code from the other - critical for field firmware updates |
| Comparator B3 integration | Dedicated comparator B3 with separate input (IVCMP3), reference (IVREF3), and output (VCOUT3) pins enables standalone analog fault detection without CPU intervention |
| High-current drive ports | 8 CMOS I/O ports support up to 20 mA sink/source - directly drive LEDs or small relays without external drivers in appliance UIs |
| On-chip debug | Full on-chip debug interface with flash rewrite capability eliminates need for external emulators during development and production programming |
Applications
| Audio Equipment Control | Home Appliance UI |
|---|---|
Use Scenario: Volume, tone, and source selection in portable audio systems with rotary encoders and push buttons. IC Role / Device Role / Timing Role: Primary MCU managing encoder debouncing, display refresh, IR remote decoding, and DAC control via UART. Use Value: Integrated KI0–KI3 key interrupts and 6-channel A/D allow direct connection of potentiometers and sensors; UART0 interfaces with audio codec ICs. | Use Scenario: Keypad scanning, LED status indication, and motor timing in microwave ovens or washing machines. IC Role / Device Role / Timing Role: System controller handling user input, relay/LED drive, and precise timing for cooking cycles or spin phases. Use Value: Eight high-current I/O ports drive LEDs and relays directly; Timer RC's PWM outputs control fan/motor speed without external timers. |
| Office Equipment Sensor Hub | Consumer Product Power Management |
Use Scenario: Paper jam detection, toner level sensing, and temperature monitoring in laser printers. IC Role / Device Role / Timing Role: Peripheral sensor aggregator feeding data to main host processor via UART or shared memory. Use Value: Six A/D channels monitor thermistors, photodiodes, and pressure sensors simultaneously; voltage detection circuit ensures safe shutdown during brownout. | Use Scenario: Battery voltage monitoring and charging state control in cordless power tools. IC Role / Device Role / Timing Role: Dedicated power supervisor interfacing with fuel gauge ICs and charge controllers. Use Value: Dual voltage detection (VDET0/VDET1) provides configurable thresholds for low-battery warning and critical cutoff; data flash stores battery cycle history. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microcontroller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| R5F2M121ANDD | Same core, memory, and peripherals but in 20-pin DIP (PRDP0020AD-A) package with -40°C to +85°C industrial temperature range | Preferred for through-hole prototyping or legacy board upgrades requiring wider temp range | Select R5F2M121ANDD when extended temperature operation or DIP compatibility is required; no software changes needed |
| R5F2M122ANSP | Identical package and temperature grade but with 8 KB program ROM and 512 bytes RAM - no change to peripheral set or pinout | Suitable for applications needing larger firmware footprint (e.g., USB stack, advanced UI logic) | Choose R5F2M122ANSP when additional code space is required; binary-compatible upgrade path with same PCB layout |
Compared with R5F2M121ANDD and R5F2M122ANSP, the R5F2M121ANSP offers optimal balance of code density, I/O count, and cost for mid-complexity consumer control tasks - retaining full peripheral functionality while minimizing flash overhead and BOM cost.
Availability
R5F2M121ANSP is available at Aetrix Electronics and suitable for home appliance control, audio equipment interfaces, and office device sensor hubs requiring stable component supply and long-term manufacturing continuity.
Supply support for R5F2M121ANSP 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 automotive, industrial, and consumer markets.
The R8C/M12A Group, including the R5F2M121ANSP, was designed for cost-sensitive, low-power embedded control in consumer electronics - emphasizing integration of analog peripherals, robust EMI/EMS performance, and compact packaging.
FAQ
What is the maximum operating frequency and corresponding voltage range for the R5F2M121ANSP?
The R5F2M121ANSP operates at up to 20 MHz when supplied with 2.7 V to 5.5 V. At lower voltages (1.8 V to 5.5 V), the maximum frequency is reduced to 5 MHz to ensure stable operation across the full specified voltage range. This dual-frequency capability allows flexible power/performance trade-offs in battery-powered or wide-input-voltage designs.
Does the R5F2M121ANSP support in-system programming of its data flash blocks?
Yes, the R5F2M121ANSP supports in-system programming of both 1 KB data flash blocks using the on-chip debug interface and standard flash rewrite commands. Each block can be erased and rewritten independently up to 10,000 times, enabling reliable storage of calibration data, usage logs, or configuration parameters during normal operation.
How many analog input channels does the R5F2M121ANSP A/D converter support, and what is its resolution?
The R5F2M121ANSP integrates a 10-bit successive-approximation A/D converter with six dedicated analog input channels (AN0–AN4, AN7). It supports sample-and-hold operation and sweep mode for sequential conversion, delivering 10-bit precision across the full 0–VCC input range with typical integral nonlinearity of ±1 LSB.
What debug and programming interfaces are available on the R5F2M121ANSP?
The R5F2M121ANSP features a full on-chip debug interface compatible with Renesas E1/E20 emulators, supporting breakpoints, watchpoints, and real-time variable monitoring. Flash programming is performed via the same interface, with security enforced by ID code check and lock bit protection to prevent unauthorized access to firmware.
Is the R5F2M121ANSP pin-compatible with other devices in the R8C/M12A Group?
Yes, all R8C/M12A Group devices in the 20-pin LSSOP package (PLSP0020JB-A), including R5F2M120ANSP, R5F2M121ANSP, and R5F2M122ANSP, share identical pinouts and electrical characteristics. Firmware and hardware designs are interchangeable across these variants - only program ROM size and RAM capacity differ.
R5F2M121ANSP#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:
- -20°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
R5F2M121ANSP#W4 FAQ
1.How can I place an order for R5F2M121ANSP#W4 through Aetrix?
Please submit a Request for Quotation (RFQ) for R5F2M121ANSP#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 R5F2M121ANSP#W4 reliable?
The price and inventory of R5F2M121ANSP#W4 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for R5F2M121ANSP#W4 is usually 5 days.
3.What payment methods are accepted for R5F2M121ANSP#W4?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for R5F2M121ANSP#W4 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for R5F2M121ANSP#W4?
R5F2M121ANSP#W4 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your R5F2M121ANSP#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 R5F2M121ANSP#W4?
For technical support, including R5F2M121ANSP#W4 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your R5F2M121ANSP#W4 requirements.
6.How does Aetrix verify that R5F2M121ANSP#W4 is sourced from the original manufacturer or authorized distributors?
All R5F2M121ANSP#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 R5F2M121ANSP#W4 meets industry standards.
7.What is the process for return or replacement of R5F2M121ANSP#W4?
All R5F2M121ANSP#W4 units undergo pre-shipment inspection (PSI). If there is an issue with R5F2M121ANSP#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 R5F2M121ANSP#W4 part is unused and in its original packaging.
Return procedure for R5F2M121ANSP#W4:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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