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Renesas R5F121BAGFP#30
- Part No.:
- R5F121BAGFP#30
- Manufacturer:
- Renesas
- Category:
- Microcontrollers
- Package:
- 32-LQFP
- Datasheet:
-
R5F121BAGFP#30.pdf
- Description:
- MCU:RL78
- Quantity:
- Payment:
- Shipping:
Inventory:1,448
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Product details
Overview
R5F121BAGFP#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 +105°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 - targeting embedded control in HVAC, industrial HMI, and appliance user-interface modules.
For engineers reviewing the R5F121BAGFP#30 datasheet, R5F121BAGFP#30 pinout, R5F121BAGFP#30 application, or R5F121BAGFP#30 equivalent, key selection criteria include its 32-pin LQFP-0.8mm package, G-grade temperature range (−40°C to +105°C), integrated CTSU for touch buttons, and dual serial interface support (IICA + CSI) without BGO during data flash writes.
Technical Context
The R5F121BAGFP#30 implements the RL78 CPU core with a 3-stage pipeline CISC architecture, supporting instruction execution times from 0.0625 μs (16 MHz high-speed mode) to 30.5 μs (32.768 kHz ultra-low-power mode). 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 on-chip RAM.
Peripherals are tightly coupled to low-power operation: HALT/STOP modes, on-chip high-speed oscillator (±1.0% accuracy at TA = −20 to +85°C), watchdog timer with dedicated low-speed oscillator, and 16-bit timer array (8 channels) with interval and RTC2 (99-year calendar) functions - all designed for deterministic real-time response in resource-constrained industrial edge nodes.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Core Architecture | RL78 16-bit CISC with 3-stage pipeline; enables deterministic timing for real-time control loops |
| 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, 32-bit rewrite unit); rated for 1,000,000 rewrites at VDD = 2.4–5.5 V |
| Operating Voltage | 2.4 V to 5.5 V single supply; eliminates need for external voltage regulators in battery- or rail-powered systems |
| Temperature Range | −40°C to +105°C (G-grade); qualified for industrial ambient conditions without derating |
| Capacitive Touch | 15-channel CTSU supporting self- and mutual-capacitance methods; enables robust touch button/knob implementation |
| ADC Resolution | 8/10-bit SAR ADC with 11 analog inputs; includes internal reference (0.815 V) and temperature sensor |
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 3.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| P00 | TOOLTxD / SO00 / TxD0 | Primary UART transmit pin; also serves as serial array output and general-purpose digital output |
| P01 | TOOLRxD / SI00 / RxD0 / ANI0 | Primary UART receive pin with analog input capability; supports debug communication and serial data ingress |
| P02 | PCLBUZ0 / ANI1 / VCOUT0 / TSCAP | Capacitive touch sense channel input; also provides buzzer drive and analog input for system monitoring |
| P125 | RESET / INTP1 | Active-low reset input with interrupt capability; ensures reliable power-on and fault recovery sequencing |
| VDD | Power Supply | Main 2.4–5.5 V supply rail; powers core, peripherals, and I/O banks |
| VSS | Ground | Digital ground reference; must be low-impedance connection for noise-sensitive analog and touch functions |
| P41 | RTC1HZ / TS13 / TI03 / TO03 | Real-time clock 1 Hz output and touch sense channel; enables low-power timekeeping and HMI wake-up |
| P60 | SCLA0 / INTP3 / INTP6 | I²C clock line with dual interrupt capability; supports multi-master arbitration and fast-mode (400 kHz) operation |
Key Features
| Feature | Design Value |
|---|---|
| Low-power HALT/STOP modes | Reduces current consumption to sub-μA levels while preserving RAM and register state for rapid wake-up |
| On-chip high-speed oscillator | 16/8/4/2/1 MHz selectable with ±1.0% accuracy (−20°C to +85°C); eliminates external crystal for cost-sensitive designs |
| Capacitive touch sensing unit (CTSU) | 15-channel hardware-accelerated touch engine with noise immunity; supports up to 16 keys in mutual-capacitance matrix |
| Real-time clock with calendar | 99-year calendar with alarm and auto-correction; operates independently during STOP mode using sub-system clock |
| Multiple serial interfaces | Up to 3 CSI (SPI-like), 3 UART, 3 simplified I²C, and 1 full I²C - enables concurrent sensor, display, and host communication |
Applications
| Industrial HMI Panels | Smart Thermostats |
|---|---|
Use Scenario: Wall-mounted control interface with touch buttons, LCD backlight, and local temperature/humidity sensing. IC Role / Device Role / Timing Role: Main system controller executing UI logic, managing CTSU inputs, driving display via SPI, and logging sensor data to data flash. Use Value: Integrated CTSU and 11-channel ADC eliminate external touch controller and signal-conditioning ICs; 32 KB flash accommodates firmware + localized calibration tables. | Use Scenario: Battery-operated residential thermostat requiring multi-year operation on two AA cells. IC Role / Device Role / Timing Role: Low-power system manager handling RTC wake-ups, thermistor/NTC readings, relay control, and wireless module handshaking. Use Value: HALT/STOP modes reduce active current to 61 µA/MHz at 125°C; on-chip oscillator and RTC2 enable precise scheduling without external timing components. |
| Appliance Control Boards | Programmable Logic Controllers (PLC) I/O Modules |
Use Scenario: Washing machine main control board managing motor drivers, water valves, and user interface. IC Role / Device Role / Timing Role: Central MCU coordinating PWM motor control (via timer array), analog sensor monitoring (ADC), and touch-based UI (CTSU). Use Value: 8-channel 16-bit timer array supports independent motor phase timing; 2 KB RAM buffers sensor history and fault logs during transient events. | Use Scenario: DIN-rail mounted I/O expansion module with analog input, digital isolation, and Modbus RTU over RS-485. IC Role / Device Role / Timing Role: Protocol processor handling Modbus framing, CRC calculation, and isolated UART-to-Modbus conversion. Use Value: Dual UART + simplified I²C allows simultaneous RS-485 communication and local sensor bus management; G-grade temp rating ensures reliability in cabinet environments. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microcontroller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| R5F121BCGFP#30 | Same package and pinout; differs only in memory configuration (32 KB flash + 1 KB data flash vs. R5F121BAGFP#30's 32 KB + 1 KB - identical) | No functional difference; both are G-grade 32-pin LQFP variants of RL78/G16 | Select R5F121BCGFP#30 only if legacy BOM references that specific suffix; functionally interchangeable |
| R5F121BCMFP#30 | M-grade variant rated for −40°C to +125°C; otherwise identical peripheral set, memory, and pinout | Required for under-hood automotive or high-temp industrial enclosures exceeding +105°C | Choose R5F121BCMFP#30 when ambient operating temperature exceeds +105°C; no PCB changes needed |
Compared with R5F121BAGFP#30, R5F121BCGFP#30 offers identical functionality with no trade-offs, while R5F121BCMFP#30 extends thermal range to +125°C at same footprint - enabling drop-in upgrades for harsher environments without firmware or layout revision.
Availability
R5F121BAGFP#30 is available at Aetrix Electronics and suitable for industrial HMI panels, smart thermostats, and appliance control boards requiring stable component supply across extended product lifecycles.
Supply support for R5F121BAGFP#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 solutions for industrial, automotive, and IoT markets.
The RL78/G16 product line delivers ultra-low-power 16-bit MCUs optimized for cost-sensitive, battery-operated, and thermally demanding embedded applications - combining rich analog integration with robust industrial qualification.
FAQ
What is the maximum operating frequency and corresponding instruction cycle time for the R5F121BAGFP#30?
The R5F121BAGFP#30 supports a maximum CPU operating frequency of 16 MHz using the on-chip high-speed oscillator, delivering a minimum instruction execution time of 0.0625 μs. This timing is achievable with the high-speed on-chip oscillator enabled and no wait states inserted - verified in the R01DS0431EJ0130 datasheet Section 1.1.
Does the R5F121BAGFP#30 support background operation (BGO) during data flash rewriting?
No, the R5F121BAGFP#30 does not support background operation during data flash rewriting. As stated in the datasheet, instructions cannot be executed from code flash memory while rewriting data flash - requiring careful state management and temporary suspension of critical tasks during write sequences.
What is the pin count and package type of the R5F121BAGFP#30?
The R5F121BAGFP#30 uses a 32-pin plastic LQFP package with 7.0 × 7.0 mm body size and 0.8-mm lead pitch. The "FP" suffix in the part number explicitly denotes this LQFP configuration, confirmed in Table 1-1 and Figure 1-1 of the R01DS0431EJ0130 datasheet.
How many analog input channels does the R5F121BAGFP#30 support, and what ADC resolution options are available?
The R5F121BAGFP#30 supports up to 11 analog input channels (ANI0–ANI10) with an 8/10-bit successive approximation register (SAR) ADC. Resolution is software-selectable per conversion, and the ADC includes internal reference voltage (0.815 V TYP.) and integrated temperature sensor - all detailed in Section 1.1 "A/D converter" of the datasheet.
Is the R5F121BAGFP#30 qualified for industrial temperature operation, and what is its specified range?
Yes, the R5F121BAGFP#30 is qualified for industrial operation with a specified ambient temperature range of −40°C to +105°C (G-grade). This is explicitly defined in Section 1.1 "Operating ambient temperature" and confirmed by the "G" character in the part number's field-of-application code.
R5F121BAGFP#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 ~ 105°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
R5F121BAGFP#30 FAQ
1.How can I place an order for R5F121BAGFP#30 through Aetrix?
Please submit a Request for Quotation (RFQ) for R5F121BAGFP#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 R5F121BAGFP#30 reliable?
The price and inventory of R5F121BAGFP#30 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for R5F121BAGFP#30 is usually 5 days.
3.What payment methods are accepted for R5F121BAGFP#30?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for R5F121BAGFP#30 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for R5F121BAGFP#30?
R5F121BAGFP#30 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your R5F121BAGFP#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 R5F121BAGFP#30?
For technical support, including R5F121BAGFP#30 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your R5F121BAGFP#30 requirements.
6.How does Aetrix verify that R5F121BAGFP#30 is sourced from the original manufacturer or authorized distributors?
All R5F121BAGFP#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 R5F121BAGFP#30 meets industry standards.
7.What is the process for return or replacement of R5F121BAGFP#30?
All R5F121BAGFP#30 units undergo pre-shipment inspection (PSI). If there is an issue with R5F121BAGFP#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 R5F121BAGFP#30 part is unused and in its original packaging.
Return procedure for R5F121BAGFP#30:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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