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Renesas R5F121BAMFP#30
- Part No.:
- R5F121BAMFP#30
- Manufacturer:
- Renesas
- Category:
- Microcontrollers
- Package:
- 32-LQFP
- Datasheet:
-
R5F121BAMFP#30.pdf
- Description:
- MCU:RL78
- Quantity:
- Payment:
- Shipping:
Inventory:1,500
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Product details
Overview
R5F121BAMFP#30 from Renesas Electronics is a 32-pin LQFP-packaged 16-bit RL78/G16 microcontroller with 32 KB code flash, 2 KB RAM, and industrial-grade operation up to +125°C. It integrates an 8/10-bit ADC (11-channel), capacitive touch sensing unit (15-channel), real-time clock with calendar, and multiple serial interfaces including UART, simplified SPI (CSI), simplified I²C, and full I²C - deployed in smart home appliance control panels requiring low-power, high-integration HMI solutions.
For engineers reviewing the R5F121BAMFP#30 datasheet, R5F121BAMFP#30 pinout, R5F121BAMFP#30 application, or R5F121BAMFP#30 equivalent, key selection criteria include its M-grade temperature rating (−40°C to +125°C), 32-pin LQFP-0.8mm package compatibility, integrated CTSU for self-capacitive touch keys, and dual serial array units supporting concurrent UART/CSI/I²C communication without CPU intervention.
Technical Context
The R5F121BAMFP#30 implements the RL78 CPU core with a 3-stage pipeline CISC architecture, supporting instruction execution times from 0.0625 μs (@16 MHz) to 30.5 μs (@32.768 kHz). Its memory subsystem includes 32 KB on-chip code flash (1 KB erase blocks), 1 KB data flash (512 B blocks, 1M rewrite cycles), and 2 KB RAM - all accessible under single 2.4–5.5 V supply.
Peripheral integration centers on system-level responsiveness: 8× 16-bit timers, 12-bit interval timer, watchdog timer with dedicated low-speed oscillator, RTC with 99-year calendar and alarm, and a 15-channel capacitive touch sensing unit (CTSU) supporting both self- and mutual-capacitance configurations - enabling robust, noise-immune touch UIs in harsh environments.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| CPU Core | RL78 16-bit CISC with 3-stage pipeline; enables deterministic real-time response and ultra-low-power STOP/HALT modes. |
| Flash Memory | 32 KB code flash (1 KB erase blocks); supports in-application programming without boot swap, ideal for field firmware updates. |
| Data Flash | 1 KB data flash (512 B blocks, 32-bit rewrite unit); rated for 1,000,000 rewrites at VDD = 2.4–5.5 V for parameter storage. |
| Operating Temp | −40°C to +125°C (M-grade); qualified for under-hood automotive sensors and industrial motor drives without external thermal derating. |
| ADC | 8/10-bit resolution, 11 analog inputs, internal reference (0.815 V), temp sensor, and touch voltage support - enables direct sensor-to-digital conversion without external references. |
| CTSU | 15-channel capacitive touch unit; supports self-capacitance (15 keys) or mutual-capacitance matrix (up to 16 keys) - eliminates mechanical buttons in sealed enclosures. |
| Serial Interfaces | Up to 3 UART, 3 simplified SPI (CSI), 3 simplified I²C, and 1 full I²C channel; serial array units enable background transfers independent of CPU load. |
Pinout & Package
32-pin plastic LQFP (7.0 × 7.0 mm, 0.8-mm pitch), exposed pad not electrically connected; RoHS-compliant, moisture sensitivity level (MSL) 3.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| P00 | TOOLTxD / SO00 / TxD0 / SCK11 / SCL11 / SI11 / SDA11 / SCLA0 | Primary UART transmit; also serves as SPI master clock, I²C clock/data, and serial array input - enables flexible peripheral bridging. |
| P01 | TOOLRxD / ANI0 / TS00 / TI02 / TO02 / SI00 / RxD0 / SDA00 / SO11 / SDAA0 | Analog input 0 and touch sense channel 0; dual-role UART receive and serial array data lines - supports simultaneous analog sensing and comms. |
| P125 | RESET / INTP1 / VCOUT0 / VCOUT1 / INTP0 / SI11 | Dedicated reset input with glitch filtering; shares interrupt and voltage comparator output functions - simplifies power-on sequencing and fault detection. |
| P41 | RTC1HZ / TS13 / TI03 / TO03 / SCK20 / SCL20 / VCOUT0 / VCOUT1 / INTP3 / INTP4 / TI02 / TO02 / SO11 / SDA11 | Real-time clock 1 Hz output and touch channel 13; multiplexed with timer I/O and serial clock - enables time-stamped touch events and synchronized comms. |
| VDD | Power Supply | Single 2.4–5.5 V supply powers entire core, peripherals, and analog blocks - eliminates need for external regulators in battery-powered designs. |
| VSS | Ground | Dedicated digital ground pin; separate from analog ground in layout recommendations - ensures ADC and CTSU accuracy under mixed-signal operation. |
Key Features
| Feature | Design Value |
|---|---|
| Low-power operation | 61 µA/MHz active current at TA = 125°C; HALT/STOP modes reduce current to sub-µA levels - extends battery life in portable industrial monitors. |
| On-chip debug | Full on-chip debug interface via TOOL0/TOOLRxD/TOOLTxD pins; no external debugger required for firmware development or field diagnostics. |
| Capacitive touch sensing | CTSU supports self-capacitance (15 keys) and mutual-capacitance (16-key matrix) with built-in noise rejection - enables reliable touch UIs in EMI-heavy factory environments. |
| Real-time clock | Hardware RTC with 99-year calendar, alarm, and clock correction; operates independently during STOP mode - maintains timekeeping during deep sleep. |
| High-speed on-chip oscillator | 16 MHz ±1.5% accuracy over −40°C to +125°C; eliminates external crystal for cost-sensitive applications while meeting timing-critical UART baud rates. |
Applications
| Smart Appliance Control Panel | Industrial Motor Drive Interface |
|---|---|
|
Use Scenario: Touch-enabled front panel for HVAC controllers with display backlight control, temperature sensing, and fan speed adjustment. IC Role / Device Role / Timing Role: Main system controller executing UI logic, ADC sampling, CTSU scanning, and UART communication with main MCU. Use Value: Integrated CTSU and 11-channel ADC eliminate external touch ICs and signal conditioners; 32 KB flash accommodates multi-language UI firmware. |
Use Scenario: Local I/O module monitoring motor temperature, current, and encoder position while relaying status via RS-485. IC Role / Device Role / Timing Role: Peripheral intelligence node handling analog acquisition, pulse counting (TI00/TI03), and isolated UART-to-RS485 translation. Use Value: 16-bit timers with capture/compare and hardware UART simplify encoder interfacing and protocol conversion; M-grade temp rating ensures reliability near motors. |
| Automotive Cabin Sensor Hub | Energy Meter Communication Module |
|
Use Scenario: Occupancy and ambient light sensing module in vehicle door panels, communicating via LIN bus to body control unit. IC Role / Device Role / Timing Role: Dedicated sensor fusion processor running CTSU for proximity detection and ADC for photodiode input. Use Value: On-chip voltage comparator (IVCMP0/IVCMP1) and internal reference enable direct photodiode signal conditioning; STOP mode draws <1 µA for wake-on-touch. |
Use Scenario: PLC-connected metering module aggregating pulse outputs from utility meters and transmitting via Modbus RTU over RS-485. IC Role / Device Role / Timing Role: Protocol gateway managing pulse counting (TI00), UART framing, CRC calculation, and watchdog supervision. Use Value: Dual serial array units allow simultaneous Modbus RTU transmission and local debug UART access; data flash stores calibration constants across 1M+ field cycles. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microcontroller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| R5F121BCMFP#30 | Same package and pinout; G-grade (−40°C to +105°C) instead of M-grade; identical flash/RAM/peripherals. | Suitable for industrial equipment operating below +105°C; not qualified for under-hood automotive or high-temp motor drive zones. | Select when full +125°C operation is unnecessary and cost optimization is prioritized. |
| R5F121BCAFP#30 | Same die and features; A-grade (−40°C to +85°C); packaged in same 32-pin LQFP but with consumer-grade qualification. | Targeted at white goods and consumer electronics where ambient temperature remains ≤85°C. | Choose only for non-industrial applications with verified thermal margins and lower qualification requirements. |
Compared with R5F121BCMFP#30 and R5F121BCAFP#30, the R5F121BAMFP#30 uniquely supports continuous operation at +125°C with full peripheral functionality - making it the sole option for thermally demanding embedded control nodes where derating is unacceptable.
Availability
R5F121BAMFP#30 is available at Aetrix Electronics and suitable for industrial motor drives, smart appliance control panels, and automotive cabin sensor hubs requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for R5F121BAMFP#30 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 is a global semiconductor leader specializing in microcontrollers, analog, and power management solutions for automotive, industrial, and IoT markets.
The RL78/G16 product line delivers ultra-low-power 16-bit MCUs optimized for cost-sensitive, thermally demanding embedded applications - combining rich analog integration, capacitive touch, and robust industrial qualification in compact packages.
FAQ
What is the maximum operating temperature specification for the R5F121BAMFP#30?
The R5F121BAMFP#30 is rated for continuous operation from −40°C to +125°C (M-grade industrial qualification). This specification is validated across all embedded peripherals including the ADC, CTSU, and serial interfaces - enabling deployment in engine bay sensors, industrial inverters, and other high-temperature environments without thermal derating.
Does the R5F121BAMFP#30 support in-system programming without external hardware?
Yes, the R5F121BAMFP#30 supports full on-chip debug and self-programming via its integrated debug interface using TOOL0, TOOLRxD, and TOOLTxD pins. No external programmer is required for firmware updates or field diagnostics - reducing test and maintenance overhead in deployed systems.
How many capacitive touch channels does the R5F121BAMFP#30 provide, and what configuration options exist?
The R5F121BAMFP#30 integrates a 15-channel capacitive touch sensing unit (CTSU). It supports self-capacitance mode (one key per pin, up to 15 keys) and mutual-capacitance matrix mode (transmit/receive pin pairing from the same 15 pins, supporting up to 16 keys) - enabling flexible, noise-immune touch UIs in sealed industrial enclosures.
What serial communication interfaces are available on the R5F121BAMFP#30?
The R5F121BAMFP#30 provides up to three UART channels, three simplified SPI (CSI) channels, three simplified I²C channels, and one full I²C channel. These are managed by two independent serial array units - allowing concurrent, CPU-independent communication across multiple protocols such as Modbus RTU, I²C sensor networks, and SPI displays.
Is the R5F121BAMFP#30 pin-compatible with other RL78/G16 variants in the same package?
Yes, the R5F121BAMFP#30 shares identical pinout and package (32-pin LQFP, 0.8-mm pitch) with all other FP-suffixed RL78/G16 variants including R5F121BCMFP#30 and R5F121BCAFP#30 - enabling drop-in replacement across temperature grades without PCB redesign.
R5F121BAMFP#30 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Renesas
- Package/Case:
- 32-LQFP
- Series:
- RL78/G16
- Packaging:
- Tray
- Product Status:
- Last Time Buy
- Programmable:
- -
- Core Processor:
- RL78
- Core Size:
- 16-Bit
- Speed:
- 16MHz
- Connectivity:
- CSI, I2C, SPI, UART/USART
- Peripherals:
- Capacitive Touch, POR, PWM, Voltage Detect, WDT
- Number of I/O:
- 29
- Program Memory Size:
- 16KB (16K x 8)
- Program Memory Type:
- FLASH
- EEPROM Size:
- 1K x 8
- RAM Size:
- 2K x 8
- Voltage - Supply (Vcc/Vdd):
- 2.4V ~ 5.5V
- Data Converters:
- A/D 11x8/10b
- Oscillator Type:
- External, Internal
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
R5F121BAMFP#30 FAQ
1.How can I place an order for R5F121BAMFP#30 through Aetrix?
Please submit a Request for Quotation (RFQ) for R5F121BAMFP#30 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 R5F121BAMFP#30 reliable?
The price and inventory of R5F121BAMFP#30 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for R5F121BAMFP#30 is usually 5 days.
3.What payment methods are accepted for R5F121BAMFP#30?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for R5F121BAMFP#30 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for R5F121BAMFP#30?
R5F121BAMFP#30 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your R5F121BAMFP#30 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 R5F121BAMFP#30?
For technical support, including R5F121BAMFP#30 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your R5F121BAMFP#30 requirements.
6.How does Aetrix verify that R5F121BAMFP#30 is sourced from the original manufacturer or authorized distributors?
All R5F121BAMFP#30 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 R5F121BAMFP#30 meets industry standards.
7.What is the process for return or replacement of R5F121BAMFP#30?
All R5F121BAMFP#30 units undergo pre-shipment inspection (PSI). If there is an issue with R5F121BAMFP#30, 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 R5F121BAMFP#30 part is unused and in its original packaging.
Return procedure for R5F121BAMFP#30:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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