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Renesas R5F121BAGFP#10
- Part No.:
- R5F121BAGFP#10
- Manufacturer:
- Renesas
- Category:
- Microcontrollers
- Package:
- 32-LQFP
- Datasheet:
-
R5F121BAGFP#10.pdf
- Description:
- 16BIT MCU RL78/G16 16K 32LQFP -4
- Quantity:
- Payment:
- Shipping:
Inventory:2,756
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Product details
Overview
R5F121BAGFP#10 from Renesas Electronics is a 32-pin LQFP-packaged 16-bit RL78/G16 microcontroller with 32 KB flash, 2 KB RAM, and integrated capacitive touch sensing (15-channel CTSU), designed for industrial human-machine interface applications operating from −40°C to +105°C. It features an RL78 CPU core (3-stage pipeline), 8× 16-bit timers, 10-bit A/D converter (11-channel), real-time clock with calendar, and multiple serial interfaces including UART, simplified SPI (CSI), simplified I²C, and full I²C.
For engineers reviewing the R5F121BAGFP#10 datasheet, R5F121BAGFP#10 pinout, R5F121BAGFP#10 application, or R5F121BAGFP#10 equivalent, key selection considerations include industrial temperature grade (G), LQFP-32 package compatibility, on-chip CTSU support for touch buttons/sliders, and dual-voltage operation (2.4–5.5 V) with ultra-low-power STOP/HALT modes.
Technical Context
The R5F121BAGFP#10 implements the RL78 CPU core with CISC architecture and configurable instruction timing (0.0625 μs min @ 16 MHz high-speed oscillator or 30.5 μs @ 32.768 kHz subsystem clock). Its memory subsystem includes 32 KB code flash (1 KB erase blocks), 1 KB data flash (512 B blocks, 1M rewrite cycles), and 2 KB SRAM - all accessible within a unified 1 MB address space.
Peripheral integration centers on mixed-signal HMI support: 11-channel 10-bit A/D converter with internal reference (0.815 V) and temperature sensor, dual comparators with selectable reference sources, and a dedicated 15-channel capacitive touch sensing unit (CTSU) supporting self- and mutual-capacitance configurations. Clocking includes a factory-trimmed high-speed on-chip oscillator (±1.0% accuracy at TA = −20 to +85°C).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| CPU Core | RL78 16-bit CISC with 3-stage pipeline, 1 MB address space |
| Flash Memory | 32 KB code flash (1 KB erase blocks); supports self-programming without boot swap |
| Data Flash | 1 KB data flash (512 B blocks); 1,000,000 write/erase cycles; no background operation |
| RAM | 2 KB on-chip SRAM |
| Operating Voltage | 2.4 V to 5.5 V single supply - enables direct battery or industrial rail interfacing |
| Temperature Range | −40°C to +105°C (Industrial G-grade) - qualified for extended ambient environments |
| Capacitive Touch | 15-channel CTSU supporting self-capacitance (15 keys) or mutual-capacitance matrix (up to 16 keys) |
| A/D Converter | 10-bit resolution, 11 analog inputs, internal 0.815 V reference, temperature sensor channel |
Pinout & Package
Package: 32-pin LQFP (7.0 × 7.0 mm, 0.8-mm pitch), lead-free, RoHS-compliant.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| P00 | TOOLTxD / SO00 / TxD0 | UART transmit output or serial array output - primary debug and communication interface |
| P01 | TOOLRxD / SI00 / RxD0 / ANI0 | UART receive input with analog input capability - supports in-circuit debugging and sensor signal acquisition |
| P02 | PCLBUZ0 / ANI1 / VCOUT0 / TSCAP | Capacitive touch sensing input with buzzer drive and analog input - dedicated CTSU electrode connection |
| P125 | RESET / INTP1 | Active-low reset input with interrupt capability - ensures reliable power-on and fault recovery |
| VDD / VSS | Power supply / Ground | Single 2.4–5.5 V supply pair - simplifies power design and eliminates level-shifting needs |
| P41 | RTC1HZ / TS13 / TI03 / TO03 | Real-time clock 1 Hz output with touch sensing and timer I/O - enables low-power timekeeping and HMI event triggering |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low-power operation | 61 µA/MHz active current at TA = 125°C - extends battery life in portable industrial devices |
| Integrated capacitive touch sensing (CTSU) | 15-channel hardware accelerator with self/mutual-capacitance modes - eliminates external touch controller IC |
| High-accuracy on-chip oscillator | ±1.0% frequency tolerance (2.4–5.5 V, −20 to +85°C) - removes need for external crystal in cost-sensitive designs |
| Industrial temperature grade | −40°C to +105°C operation (G-grade) - certified for harsh factory-floor and automotive under-hood environments |
| On-chip debug and programming | Full on-chip debug interface with flash shield window - enables secure firmware updates and field reprogramming |
| Mixed-signal peripheral set | 10-bit 11-channel A/D, dual comparators, RTC with calendar, and temperature sensor - supports complete sensor-to-UI signal chain |
Applications
| Home Appliance Control Panel | Industrial HMI Terminal |
|---|---|
Use Scenario: Touch-enabled front panel for washing machines, ovens, or HVAC systems requiring robust operation across wide temperature swings and EMI-rich environments. IC Role / Device Role / Timing Role: Main system controller executing UI logic, reading capacitive touch inputs, driving buzzer feedback, and managing motor/sensor peripherals via UART and timers. Use Value: Integrated CTSU and industrial temp grade eliminate external touch IC and thermal derating margins, reducing BOM count and qualification effort. | Use Scenario: Compact operator interface for PLC-connected machinery, featuring buttonless touch controls, status LEDs, and real-time diagnostics display. IC Role / Device Role / Timing Role: Real-time HMI processor handling touch event detection, RTC-based logging, and serial communication with host controllers over UART or simplified SPI. Use Value: On-chip 10-bit A/D and temperature sensor enable direct monitoring of enclosure temperature and supply voltage, improving system reliability reporting. |
| Smart Building Sensor Node | Medical Device User Interface |
Use Scenario: Battery-powered environmental monitor (temp/humidity/light) with touch wake-up and BLE gateway interface in commercial buildings. IC Role / Device Role / Timing Role: Low-power sensor aggregator using STOP mode between readings, waking on CTSU events or RTC alarms to process and transmit data. Use Value: 61 µA/MHz active current and HALT/STOP modes extend coin-cell battery life beyond 5 years in intermittent-read applications. | Use Scenario: Patient-facing control interface for infusion pumps or diagnostic equipment requiring ESD-hardened touch response and fail-safe operation. IC Role / Device Role / Timing Role: Safety-monitored UI controller with independent watchdog timer, RTC alarm for dose timing, and comparator-based voltage supervision. Use Value: Dual comparators with selectable internal/external references enable redundant supply monitoring per IEC 62304 Class B requirements. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microcontroller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| R5F121BCMFP#10 | Same RL78/G16 core, 32 KB flash, 2 KB RAM, but rated for −40°C to +125°C (M-grade) | Required for extended-temperature industrial or automotive under-hood use cases | Select when ambient exceeds +105°C or automotive AEC-Q100 qualification is needed |
| R5F121BCAFP#10 | Identical electrical specs and pinout, but consumer-grade (A-grade, −40°C to +85°C) and lower cost | Suitable for non-industrial applications where extended temperature range is unnecessary | Choose for cost-sensitive consumer products with standard ambient conditions |
Compared with R5F121BCMFP#10, the R5F121BAGFP#10 offers optimized cost/performance for industrial environments up to +105°C, while R5F121BCAFP#10 provides a lower-cost path for commercial applications - all three share identical LQFP-32 pinout and firmware compatibility.
Availability
R5F121BAGFP#10 is available at Aetrix Electronics and suitable for industrial HMI terminals, smart building sensor nodes, home appliance control panels, and medical device user interfaces requiring stable component supply across extended temperature ranges.
Supply support for R5F121BAGFP#10 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 solutions for automotive, industrial, and IoT markets.
The RL78/G16 product line delivers true low-power 16-bit MCUs with integrated capacitive touch sensing, targeting cost-sensitive industrial and consumer HMI applications requiring robust operation and minimal external components.
FAQ
What is the maximum operating frequency and instruction timing of the R5F121BAGFP#10?
The R5F121BAGFP#10 features an RL78 CPU core with configurable minimum instruction execution time: 0.0625 μs at 16 MHz (using high-speed on-chip oscillator) or 30.5 μs at 32.768 kHz (subsystem clock). Its address space spans 1 MB, and it supports up to 16 MHz operation with ±1.0% oscillator accuracy over −20°C to +85°C.
Does the R5F121BAGFP#10 support in-system programming and debug?
Yes, the R5F121BAGFP#10 includes an on-chip debug function and supports self-programming of code flash memory without boot swap functionality. It also implements a flash shield window feature for secure firmware protection during development and field updates.
What touch sensing capabilities does the R5F121BAGFP#10 provide?
The R5F121BAGFP#10 integrates a 15-channel capacitive touch sensing unit (CTSU) supporting both self-capacitance (up to 15 independent keys) and mutual-capacitance matrix configurations (up to 16 keys). It operates independently of CPU load and supports noise-immune measurement in electrically noisy industrial environments.
What are the key differences between R5F121BAGFP#10 and R5F121BCMFP#10?
The R5F121BAGFP#10 and R5F121BCMFP#10 share identical core architecture, memory (32 KB flash, 2 KB RAM), peripherals, and LQFP-32 pinout. The sole difference is operating temperature grade: R5F121BAGFP#10 is rated for −40°C to +105°C (G-grade), while R5F121BCMFP#10 extends to +125°C (M-grade) for extreme industrial or automotive under-hood use.
Can the R5F121BAGFP#10 operate from a single 3.3 V supply?
Yes, the R5F121BAGFP#10 operates across a 2.4 V to 5.5 V supply range, making it fully compatible with standard 3.3 V systems. Its internal regulators and I/O structure ensure correct logic levels and analog performance at 3.3 V without external level shifters or voltage translation.
R5F121BAGFP#10 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Renesas
- Package/Case:
- 32-LQFP
- Series:
- RL78/G16
- Packaging:
- Tray
- Product Status:
- Active
- 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 ~ 105°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
R5F121BAGFP#10 FAQ
1.How can I place an order for R5F121BAGFP#10 through Aetrix?
Please submit a Request for Quotation (RFQ) for R5F121BAGFP#10 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 R5F121BAGFP#10 reliable?
The price and inventory of R5F121BAGFP#10 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for R5F121BAGFP#10 is usually 5 days.
3.What payment methods are accepted for R5F121BAGFP#10?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for R5F121BAGFP#10 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for R5F121BAGFP#10?
R5F121BAGFP#10 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your R5F121BAGFP#10 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 R5F121BAGFP#10?
For technical support, including R5F121BAGFP#10 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your R5F121BAGFP#10 requirements.
6.How does Aetrix verify that R5F121BAGFP#10 is sourced from the original manufacturer or authorized distributors?
All R5F121BAGFP#10 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 R5F121BAGFP#10 meets industry standards.
7.What is the process for return or replacement of R5F121BAGFP#10?
All R5F121BAGFP#10 units undergo pre-shipment inspection (PSI). If there is an issue with R5F121BAGFP#10, 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 R5F121BAGFP#10 part is unused and in its original packaging.
Return procedure for R5F121BAGFP#10:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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