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Renesas R5F121BAGFP#50
- Part No.:
- R5F121BAGFP#50
- Manufacturer:
- Renesas
- Category:
- Microcontrollers
- Package:
- 32-LQFP
- Datasheet:
-
R5F121BAGFP#50.pdf
- Description:
- 16BIT MCU RL78/G16 16K 32LQFP -4
- Quantity:
- Payment:
- Shipping:
Inventory:4,100
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Product details
Overview
R5F121BAGFP#50 from Renesas Electronics is a 32-pin LQFP-packaged RL78/G16 16-bit microcontroller with 32 KB code 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), and I²C.
For engineers reviewing the R5F121BAGFP#50 datasheet, R5F121BAGFP#50 pinout, R5F121BAGFP#50 application, or R5F121BAGFP#50 equivalent, key selection criteria include industrial temperature grade (G), LQFP-32 package compatibility, on-chip CTSU support for touch buttons/sliders, and dual serial array units enabling concurrent UART + I²C + CSI operation in space-constrained embedded control designs.
Technical Context
The R5F121BAGFP#50 implements the RL78 CPU core with configurable instruction timing (0.0625 μs min @ 16 MHz to 30.5 μs @ 32.768 kHz), supporting ultra-low-power STOP/HALT modes. Its memory subsystem includes 32 KB code flash (1 KB block erase), 1 KB data flash (512 B blocks, 1M rewrite cycles), and 2 KB SRAM - all accessible under single 2.4–5.5 V supply.
Peripheral integration centers on mixed-signal capability: 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 without external components.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| CPU Core | RL78 16-bit CISC with 3-stage pipeline; supports variable instruction timing from 0.0625 μs to 30.5 μs |
| Flash Memory | 32 KB code flash (1 KB erase blocks); 1 KB data flash (512 B blocks, 1,000,000 write cycles) |
| RAM | 2 KB on-chip SRAM; no wait states across full voltage/temperature range |
| A/D Converter | 10-bit resolution, 11 analog inputs, internal 0.815 V reference, temperature sensor, and touch voltage selection |
| Capacitive Touch | 15-channel CTSU supporting self-capacitance (15 keys) or mutual-capacitance matrix (up to 16 keys) |
| Timers | Eight 16-bit timer channels, one 12-bit interval timer, watchdog timer, and RTC with 99-year calendar |
| Serial Interfaces | Up to 3 UART, 3 simplified SPI (CSI), 3 simplified I²C, and 1 standard I²C channel - all independently configurable |
Pinout & Package
32-pin plastic LQFP package (7.0 × 7.0 mm, 0.8-mm pitch), RoHS-compliant, industrial-grade (−40°C to +105°C).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| P00 | TOOLTxD / SO00 / TxD0 | Primary UART transmit output; also supports serial array clock output and secondary UART TX |
| P01 | TOOLRxD / SI00 / RxD0 / SDA00 | Primary UART receive input; also supports serial array data input and I²C data line |
| P02 | PCLBUZ0 / ANI1 / VCOUT0 / TSCAP | Capacitive touch sensing input with built-in charge pump; also functions as analog input and buzzer output |
| P125 | RESET / INTP1 | Active-low reset input with interrupt capability; requires external pull-up for reliable startup |
| VDD / VSS | Power supply / Ground | Dual power pins (Pins 7 & 8) enable low-noise analog/digital separation; decoupling required per datasheet layout guidelines |
Key Features
| Feature | Design Value |
|---|---|
| True low-power architecture | 61 µA/MHz active current at TA = 125°C; HALT/STOP modes reduce current to sub-µA levels |
| Integrated capacitive touch sensing | 15-channel CTSU eliminates need for external touch controller IC or external RC networks |
| Industrial temperature operation | Guaranteed functionality from −40°C to +105°C (G-grade), enabling use in motor drives and factory automation |
| Flexible clock system | High-speed on-chip oscillator (1–16 MHz, ±1.0% accuracy) eliminates external crystal in cost-sensitive designs |
| On-chip debug & programming | Full on-chip debug support via TOOLx pins; self-programming without boot swap function |
Applications
| Home Appliance Control Panel | Industrial HMI Keypad |
|---|---|
Use Scenario: Touch-enabled front panel for microwave ovens, washing machines, or HVAC controllers requiring robust operation in humid, thermally variable environments. IC Role / Device Role / Timing Role: Primary system controller executing UI logic, managing touch input via CTSU, driving display via GPIO/PWM, and communicating with main MCU over UART/I²C. Use Value: Single-chip solution reduces BOM count by eliminating discrete touch controller and external oscillator; 105°C rating ensures reliability near heating elements. | Use Scenario: Membrane keypad replacement in PLC operator terminals or CNC machine panels exposed to dust, vibration, and wide ambient temperature swings. IC Role / Device Role / Timing Role: Dedicated touch interface processor handling debouncing, proximity detection, and noise rejection before forwarding validated key events via UART to host controller. Use Value: CTSU's built-in noise cancellation and programmable sensitivity enables stable operation without shielding or mechanical switches; G-grade temp range matches industrial enclosure specs. |
| Smart Thermostat Interface | Medical Device Touch Panel |
Use Scenario: Wall-mounted thermostat with capacitive slider for temperature adjustment and multi-function buttons, requiring low standby power and ESD-tolerant touch sensing. IC Role / Device Role / Timing Role: Standalone touch manager interfacing with environmental sensors (temp/humidity), driving segmented LCD, and maintaining RTC-based scheduling. Use Value: 2.4–5.5 V single-supply operation simplifies power design; data flash stores calibration offsets and user preferences with 1M-cycle endurance. | Use Scenario: Patient monitor or infusion pump with sealed, glove-friendly touch interface needing medical-grade reliability and low EMI emissions. IC Role / Device Role / Timing Role: Safety-isolated touch acquisition node feeding digitized touch coordinates to main safety MCU via opto-isolated UART link. Use Value: On-chip CTSU meets IEC 60601-1 leakage current requirements; STOP mode achieves <1 µA sleep current for battery backup operation. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microcontroller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| R5F121BCGFP#50 | Same package and pinout; differs only in memory configuration (32 KB code flash vs. 32 KB), but identical peripheral set and temperature grade | No functional difference; both rated for −40°C to +105°C industrial operation | Select R5F121BCGFP#50 if firmware requires full 32 KB code flash with no margin reduction |
| R5F121BAGFP#70 | Identical silicon and electrical specs; differs only in packaging (tray vs. embossed tape) and reel quantity | No impact on circuit design or thermal performance; same PCB footprint and soldering profile | Choose R5F121BAGFP#70 for high-volume SMT assembly requiring tray delivery |
Compared with R5F121BCGFP#50 and R5F121BAGFP#70, the R5F121BAGFP#50 offers identical industrial-grade functionality and LQFP-32 compatibility, with embossed tape packaging optimized for automated pick-and-place while maintaining full feature parity and qualification.
Availability
R5F121BAGFP#50 is available at Aetrix Electronics and suitable for industrial HMI, home appliance control, smart thermostat interfaces, and medical device touch panels requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for R5F121BAGFP#50 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 ultra-low-power 16-bit MCUs with integrated capacitive touch sensing, targeting cost-sensitive industrial and consumer HMI applications where reliability, small footprint, and single-supply operation are critical.
FAQ
What is the maximum operating temperature specification for the R5F121BAGFP#50?
The R5F121BAGFP#50 is rated for industrial operation from −40°C to +105°C (G-grade). This specification is guaranteed across all electrical parameters in the datasheet, including flash programming, CTSU operation, and real-time clock accuracy. The device maintains full functionality without derating at the upper limit, making it suitable for applications near heat-generating components like motors or power supplies.
Does the R5F121BAGFP#50 support in-circuit debugging without external hardware?
Yes, the R5F121BAGFP#50 supports full on-chip debugging via its dedicated TOOL0 and TOOLRxD/TOOLTxD pins. No external debug probe is required for basic programming and breakpoint debugging; a simple UART-to-USB adapter suffices for connection to Renesas CS+ or e2 studio IDE. The on-chip debug function enables flash programming, register inspection, and real-time variable monitoring during development.
How many capacitive touch channels does the R5F121BAGFP#50 provide, and what configuration options exist?
The R5F121BAGFP#50 integrates a 15-channel capacitive touch sensing unit (CTSU) supporting both self-capacitance (15 independent keys) and mutual-capacitance (matrix configuration up to 16 keys). Self-capacitance uses one pin per key; mutual-capacitance assigns transmit/receive roles dynamically from the same 15-pin pool. No external components are needed - the CTSU includes internal charge pumps and noise cancellation circuitry.
Can the R5F121BAGFP#50 operate without an external crystal oscillator?
Yes, the R5F121BAGFP#50 includes a high-speed on-chip oscillator (HSIO) selectable from 1 MHz to 16 MHz with ±1.0% accuracy over −20°C to +85°C. This allows full operation - including UART communication at standard baud rates and CTSU timing - without any external crystal or resonator, reducing BOM cost and board area. External crystals remain optional for higher precision or RTC calibration.
What is the data flash endurance and voltage requirement for the R5F121BAGFP#50?
The R5F121BAGFP#50 provides 1 KB of data flash memory with a typical endurance of 1,000,000 write/erase cycles. Rewrites require only the main VDD supply (2.4–5.5 V); no separate programming voltage is needed. Each rewrite operates on 32-bit units, and background operation is not supported - code execution must be halted during data flash writes, as instructions cannot be fetched from code flash during the operation.
R5F121BAGFP#50 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Renesas
- Package/Case:
- 32-LQFP
- Series:
- RL78/G16
- Packaging:
- Tape & Reel (TR)
- 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#50 FAQ
1.How can I place an order for R5F121BAGFP#50 through Aetrix?
Please submit a Request for Quotation (RFQ) for R5F121BAGFP#50 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#50 reliable?
The price and inventory of R5F121BAGFP#50 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for R5F121BAGFP#50 is usually 5 days.
3.What payment methods are accepted for R5F121BAGFP#50?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for R5F121BAGFP#50 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for R5F121BAGFP#50?
R5F121BAGFP#50 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your R5F121BAGFP#50 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#50?
For technical support, including R5F121BAGFP#50 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your R5F121BAGFP#50 requirements.
6.How does Aetrix verify that R5F121BAGFP#50 is sourced from the original manufacturer or authorized distributors?
All R5F121BAGFP#50 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#50 meets industry standards.
7.What is the process for return or replacement of R5F121BAGFP#50?
All R5F121BAGFP#50 units undergo pre-shipment inspection (PSI). If there is an issue with R5F121BAGFP#50, 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#50 part is unused and in its original packaging.
Return procedure for R5F121BAGFP#50:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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