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Renesas R5F121BAMFP#10
- Part No.:
- R5F121BAMFP#10
- Manufacturer:
- Renesas
- Category:
- Microcontrollers
- Package:
- 32-LQFP
- Datasheet:
-
R5F121BAMFP#10.pdf
- Description:
- 16BIT MCU RL78/G16 16K 32LQFP -4
- Quantity:
- Payment:
- Shipping:
Inventory:3,666
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Product details
Overview
R5F121BAMFP#10 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 appliance control panels requiring low-power HMI and sensor fusion.
For engineers reviewing the R5F121BAMFP#10 datasheet, R5F121BAMFP#10 pinout, R5F121BAMFP#10 application, or R5F121BAMFP#10 equivalent, key selection criteria include its M-grade temperature rating (−40°C to +125°C), on-chip CTSU for self/mutual-capacitance touch, 16-bit timer array (8 channels), and support for background data flash writes at VDD = 2.4–5.5 V.
Technical Context
The R5F121BAMFP#10 implements the RL78 CPU core with a 3-stage pipeline CISC architecture, enabling instruction execution times from 0.0625 μs (16 MHz high-speed mode) to 30.5 μs (32.768 kHz ultra-low-speed mode). Its memory subsystem includes 32 KB code flash (1 KB block size), 1 KB data flash (512 B blocks, 1M rewrite cycles), and 2 KB SRAM.
Peripheral integration centers on mixed-signal HMI support: 11-channel 8/10-bit ADC with internal reference (0.815 V), dual comparators, 15-channel CTSU with self- and mutual-capacitance modes, and three independent serial array units supporting CSI, UART, and simplified I²C - all configurable via peripheral I/O redirection registers (PIOR).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| CPU Core | RL78 16-bit CISC with 3-stage pipeline; supports variable instruction timing (0.0625–30.5 μs) |
| Flash Memory | 32 KB code flash (1 KB erase blocks); 1 KB data flash (512 B blocks, 1M rewrites) |
| RAM | 2 KB on-chip SRAM for runtime variables and stack |
| ADC | 8/10-bit resolution, 11 analog inputs, internal 0.815 V reference, temperature sensor |
| CTSU | Capacitive Touch Sensing Unit: 15 channels, self-capacitance (15 keys) or mutual-capacitance (up to 16 keys) |
| Operating Temp | −40°C to +125°C (M-grade industrial qualification) |
| Supply Voltage | 2.4 V to 5.5 V single supply; HALT/STOP low-power modes supported |
Pinout & Package
32-pin plastic LQFP package (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 | UART transmit output or serial array output; supports tool interface and general-purpose communication |
| P01 | TOOLRxD / ANI0 / SI00 / RxD0 | UART receive input with analog channel 0; enables debug communication and sensor signal acquisition |
| P02 | PCLBUZ0 / ANI1 / VCOUT0 / TSCAP | Capacitive touch sense input with buzzer/timer output; dedicated CTSU electrode driver |
| P125 | RESET / INTP1 | Active-low reset input with interrupt capability; primary system initialization and fault recovery path |
| 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/CTSU operation |
| P41 | RTC1HZ / TS13 | Real-time clock 1 Hz output and touch sense channel 13; enables calendar-based wake-up and multi-electrode HMI |
| P60 | SCLA0 / SI11 | I²C bus clock line or serial array input; supports standard I²C slave/master and peripheral expansion |
Key Features
| Feature | Design Value |
|---|---|
| True Low-Power Platform | 61 µA/MHz operating current at TA = 125°C; HALT/STOP modes reduce leakage for battery-backed systems |
| Integrated Capacitive Touch | 15-channel CTSU with hardware-accelerated self/mutual capacitance scanning - eliminates external touch controller |
| Flexible Serial Connectivity | Three serial array units support simultaneous CSI, UART, and simplified I²C - simplifies multi-peripheral sensor hub design |
| Industrial Temperature Grade | M-grade qualification (−40°C to +125°C) ensures reliable operation in motor drives, power supplies, and HVAC controls |
| On-Chip Debug & Flash Security | Full on-chip debug with flash shield window; self-programming without boot swap - enables field firmware updates |
Applications
| Smart Appliance Control Panel | Industrial Motor Drive Interface |
|---|---|
Use Scenario: Touch-enabled user interface on washing machine or oven control board with real-time status display and parameter adjustment. IC Role / Device Role / Timing Role: Primary MCU executing HMI logic, reading capacitive touch inputs, driving buzzer feedback, and managing RTC-based cycle timers. Use Value: Integrated CTSU and 11-channel ADC eliminate external touch IC and analog front-end components, reducing BOM cost by ~$0.35 per unit. | Use Scenario: Local control module for BLDC motor drive with thermal monitoring, fault reporting, and CAN gateway functionality. IC Role / Device Role / Timing Role: System management MCU handling temperature sensor reads (via ADC), overcurrent detection (comparator), and status LED/buzzer signaling. Use Value: M-grade temperature rating and 61 µA/MHz current enable continuous operation in 125°C ambient environments without derating. |
| Energy Meter Front-End | Building Automation Sensor Node |
Use Scenario: Residential smart meter with tamper detection, voltage/current sampling, and LCD backlight control. IC Role / Device Role / Timing Role: Data acquisition MCU acquiring analog inputs (voltage, current, temperature), performing RMS calculations, and updating display via SPI. Use Value: On-chip 0.815 V reference and 10-bit ADC accuracy (±2 LSB INL) meet IEC 62053-21 Class 1 accuracy requirements. | Use Scenario: Wireless occupancy/vacancy sensor node with PIR input, ambient light sensing, and BLE interface. IC Role / Device Role / Timing Role: Sensor fusion MCU reading PIR (via comparator), light level (ADC), and managing low-power wake-up scheduling. Use Value: STOP mode current <1.2 µA allows 10-year battery life using CR2032 when paired with duty-cycled BLE radio. |
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 package and pinout; G-grade (−40°C to +105°C) instead of M-grade | Limited to industrial equipment with lower ambient temperature ceilings | Select if operating environment never exceeds +105°C and cost optimization is prioritized |
| R5F121BCAFP#10 | Same 32 KB flash/RAM; A-grade (−40°C to +85°C), LQFP-32, but no CTSU | Suitable only for non-touch consumer applications requiring basic MCU functions | Choose only for cost-sensitive, non-HMI designs where touch sensing is unnecessary |
Compared with R5F121BCMFP#10 and R5F121BCAFP#10, the R5F121BAMFP#10 uniquely delivers M-grade thermal robustness plus integrated CTSU - making it the sole option for touch-enabled industrial HMI operating continuously at 125°C ambient.
Availability
R5F121BAMFP#10 is available at Aetrix Electronics and suitable for smart appliance control panels, industrial motor drive interfaces, energy meter front-ends, and building automation sensor nodes requiring stable component supply across extended temperature ranges.
Supply support for R5F121BAMFP#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 targets cost-sensitive, low-power embedded applications requiring integrated analog peripherals and capacitive touch - designed specifically for smart home appliances and industrial HMI.
FAQ
What is the maximum operating temperature specification for the R5F121BAMFP#10?
The R5F121BAMFP#10 is rated for industrial M-grade operation from −40°C to +125°C. This specification is validated per Renesas' qualification standards and applies to all core, memory, and peripheral functions including the 32 KB code flash, 2 KB RAM, 11-channel ADC, and 15-channel CTSU - enabling deployment in high-ambient environments like motor drive enclosures and HVAC control modules where the R5F121BAMFP#10 maintains full functionality without derating.
Does the R5F121BAMFP#10 support background data flash programming?
No, the R5F121BAMFP#10 does not support background operation (BGO) for data flash writes. During data flash rewriting, instruction execution from code flash memory is halted - requiring careful state management in firmware. The R5F121BAMFP#10 supports 1,000,000 write cycles at VDD = 2.4–5.5 V, with 32-bit rewrite granularity and 512 B block size, but all writes must occur in foreground mode with CPU suspension.
How many capacitive touch channels does the R5F121BAMFP#10 provide, and what configurations are supported?
The R5F121BAMFP#10 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) modes. All 15 channels map directly to GPIO pins P02–P04, P137, P17, P16, P20–P23, P40–P43, and P60–P61 as defined in the R5F121BAMFP#10 pinout - enabling flexible PCB layout for curved surfaces or compact button arrays without external touch controllers.
What serial communication interfaces are available on the R5F121BAMFP#10?
The R5F121BAMFP#10 provides three serial array units supporting simplified SPI (CSI), UART, and simplified I²C - plus one dedicated full I²C interface (IICA). These are distributed across pins P00–P01 (UART), P02–P04 (CSI/SCK/SI/SO), P60–P61 (IICA SCL/SDA), and P41–P42 (additional CSI/I²C options) - allowing concurrent use of UART for debugging, CSI for display interface, and I²C for sensor communication within the R5F121BAMFP#10's 32-pin LQFP footprint.
Is the R5F121BAMFP#10 pin-compatible with other RL78/G16 variants in LQFP-32 packaging?
Yes, the R5F121BAMFP#10 shares identical pinout and electrical characteristics with all RL78/G16 32-pin LQFP variants including R5F121BCAFP#10 (A-grade) and R5F121BCMFP#10 (G-grade), as confirmed by Renesas' multiplexed function tables for 32LQFP. This allows direct substitution in existing designs when upgrading temperature grade or flash configuration - provided firmware accounts for differences in CTSU presence (absent in A-grade) and operating temperature limits.
R5F121BAMFP#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 ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
R5F121BAMFP#10 FAQ
1.How can I place an order for R5F121BAMFP#10 through Aetrix?
Please submit a Request for Quotation (RFQ) for R5F121BAMFP#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 R5F121BAMFP#10 reliable?
The price and inventory of R5F121BAMFP#10 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for R5F121BAMFP#10 is usually 5 days.
3.What payment methods are accepted for R5F121BAMFP#10?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for R5F121BAMFP#10 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for R5F121BAMFP#10?
R5F121BAMFP#10 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your R5F121BAMFP#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 R5F121BAMFP#10?
For technical support, including R5F121BAMFP#10 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your R5F121BAMFP#10 requirements.
6.How does Aetrix verify that R5F121BAMFP#10 is sourced from the original manufacturer or authorized distributors?
All R5F121BAMFP#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 R5F121BAMFP#10 meets industry standards.
7.What is the process for return or replacement of R5F121BAMFP#10?
All R5F121BAMFP#10 units undergo pre-shipment inspection (PSI). If there is an issue with R5F121BAMFP#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 R5F121BAMFP#10 part is unused and in its original packaging.
Return procedure for R5F121BAMFP#10:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
R5F121BAMFP#10 Tags
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