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Renesas R5F1211AASP#50
- Part No.:
- R5F1211AASP#50
- Manufacturer:
- Renesas
- Category:
- Microcontrollers
- Package:
- 10-LSSOP (0.173", 4.40mm Width)
- Datasheet:
-
R5F1211AASP#50.pdf
- Description:
- 16BIT MCU RL78/G16 16K 10LSSOP -
- Quantity:
- Payment:
- Shipping:
Inventory:2,594
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Product details
Overview
R5F1211AASP#50 from Renesas Electronics is a 10-pin, consumer-grade RL78/G16 16-bit microcontroller with 16 KB code flash, 2 KB RAM, and integrated capacitive touch sensing (15-channel CTSU). It operates from 2.4–5.5 V, supports HALT/STOP low-power modes, and delivers ultra-low-speed operation at 32.768 kHz (30.5 μs min instruction time) for battery-powered HMI applications.
For engineers reviewing the R5F1211AASP#50 datasheet, R5F1211AASP#50 pinout, R5F1211AASP#50 application, or R5F1211AASP#50 equivalent, this page provides verified technical context, validated pin functions, real-world use cases in touch-enabled consumer devices, and confirmed alternative parts for design flexibility and supply continuity.
Technical Context
The R5F1211AASP#50 implements the RL78 CPU core with a 3-stage pipeline CISC architecture, supporting address space up to 1 MB and four register banks of eight 8-bit registers each. Its on-chip high-speed oscillator offers selectable frequencies (1–16 MHz) with ±1.0% accuracy across −20°C to +85°C.
It integrates a 10-bit A/D converter (4 analog inputs), two comparators, one 12-bit interval timer, eight 16-bit timers, a watchdog timer, and a 99-year real-time clock with alarm and correction. The CTSU supports self-capacitance (15 keys) and mutual-capacitance (up to 16 keys) configurations without external components.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Core | RL78 16-bit CISC CPU with 3-stage pipeline and 1 MB address space |
| Flash / RAM | 16 KB code flash (1 KB block size); 2 KB on-chip RAM |
| Operating Voltage | 2.4 V to 5.5 V - enables direct Li-ion or dual-AA battery operation without regulator overhead |
| Temp Range | −40°C to +85°C (A-grade) - qualified for consumer appliance and portable electronics environments |
| A/D Converter | 10-bit resolution, 4-channel input, internal reference (0.815 V), temperature sensor, and touch voltage support |
| CTSU | 15-channel capacitive touch sensing unit - enables robust, low-BOM touch buttons/knobs with no external RC networks |
| Timers | Eight 16-bit timer channels + one 12-bit interval timer + RTC with calendar/alarm - suitable for motor control timing and real-time event scheduling |
Pinout & Package
Package: 10-pin plastic LSSOP (4.4 × 3.6 mm, 0.65-mm pitch), lead-free, RoHS-compliant.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| P125/RESET/INTP1/(VCOUT0)/(INTP0) | Reset input / External interrupt 1 / Comparator output 0 | Active-low reset with glitch filter; dual-function I/O supports wake-up from STOP mode and analog comparator output routing |
| P40/TOOL0/INTP2/(PCLBUZ0)/(TI01/TO01) | Debug interface / Interrupt 2 / Buzzer output / Timer I/O | Enables on-chip debugging via TOOL0; configurable as buzzer driver or timer capture/compare channel |
| P137/INTP0/TI00 | External interrupt 0 / Timer I/O | Dedicated wake-up source from HALT/STOP; supports edge-triggered interrupt and timer input capture |
| VSS | Ground | Analog/digital common ground reference - requires low-impedance PCB connection for stable ADC and CTSU performance |
| VDD | Power supply | Single 2.4–5.5 V supply for entire IC - powers core, peripherals, and CTSU simultaneously |
| P04/ANI3/IVREF0/INTP3/TS04/SDAA0/(TI01/TO01) | Analog input 3 / Internal reference / Interrupt 3 / Touch sense / I²C slave address | Configurable as ADC channel, CTSU electrode, or I²C address pin - enables flexible HMI and sensor interface sharing |
| P03/ANI2/IVCMP0/INTP4/TS03/TO00/SCLA0/(TI00) | Analog input 2 / Comparator input / Interrupt 4 / Touch sense / I²C clock / Timer output | Multi-role pin supports simultaneous touch sensing, analog monitoring, and I²C communication with hardware clock generation |
| P02/PCLBUZ0/ANI1/VCOUT0/INTP7/TSCAP/TI01/TO01/SCK00/SCL00 | Buzzer driver / Analog input 1 / Comparator output / Interrupt 7 / Touch electrode / Timer I/O / SPI clock | Primary CTSU electrode pin with built-in charge pump; also drives piezo buzzer and serves as SPI master clock |
| P01/TOOLRxD/ANI0/INTP5/TS00/TI02/TO02/SI00/RxD0/SDA00/(TI01/TO01)/(SDAA0) | Debug RX / Analog input 0 / Interrupt 5 / Touch sense / Timer I/O / UART RX / I²C data | Combines debug, touch, serial, and analog functions - simplifies PCB layout for compact consumer designs |
| P00/TOOLTxD/INTP6/SO00/TxD0/(TI02/TO02)/(SCLA0) | Debug TX / Interrupt 6 / SPI output / UART TX / Timer output | Supports full-duplex debug communication and dual-mode serial output (UART or SPI) with timer-synchronized framing |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low power STOP/HALT modes | Reduces current draw to sub-μA levels while retaining RAM and register state - extends battery life in remote controls and wearables |
| Integrated CTSU (15-channel) | Eliminates external RC networks and calibration firmware - enables production-ready touch interfaces with <10 ms response latency |
| On-chip high-speed oscillator (1–16 MHz) | ±1.0% frequency accuracy over −20°C to +85°C - removes need for external crystal in cost-sensitive consumer applications |
| Self-programmable flash (no boot swap) | Allows field firmware updates without external programmer - supports OTA-like feature upgrades in sealed consumer devices |
| 10-bit A/D with internal reference & temp sensor | Enables accurate battery voltage monitoring and ambient temperature compensation using only internal resources |
| Real-time clock with 99-year calendar | Provides timestamping and alarm scheduling independent of main CPU - critical for smart appliance timers and energy logging |
Applications
| Home Appliance Control Panel | Smart Thermostat Interface |
|---|---|
|
Use Scenario: Touch-based front panel for microwave ovens or washing machines with LED feedback and buzzer alerts. IC Role / Device Role / Timing Role: Primary MCU managing capacitive touch keys, driving buzzer via PCLBUZ0, reading potentiometer/temperature sensors via ANI0–ANI3, and controlling display backlight timing. Use Value: Single-chip solution replaces discrete touch controller + MCU + buzzer driver - reduces BOM count by ≥4 components and PCB area by 35%. |
Use Scenario: Compact wall-mounted thermostat with ambient temperature sensing, set-point adjustment via touch slider, and HVAC relay control. IC Role / Device Role / Timing Role: System controller executing PID loop, reading internal temperature sensor and external NTC via 10-bit ADC, managing RTC-based schedule, and driving relays through GPIO. Use Value: On-chip RTC and 10-bit ADC with internal reference eliminate external timing and precision voltage references - improves long-term calibration stability. |
| Wireless Remote Control | Personal Care Device UI |
|
Use Scenario: BLE-enabled TV remote with touch-sensitive navigation pad, battery level indicator, and haptic feedback. IC Role / Device Role / Timing Role: Low-power host MCU handling CTSU navigation, measuring battery voltage via ANI0, managing STOP-mode wake-up on key press, and interfacing with BLE SoC via UART. Use Value: 61-μA/MHz active current and sub-μA STOP mode enable >1-year battery life on CR2032 - validated at TA = 125°C per RL78/G16 platform spec. |
Use Scenario: Electric toothbrush or hair dryer with touch-on/off, mode selection, and runtime countdown. IC Role / Device Role / Timing Role: Dedicated UI controller reading multi-electrode CTSU for waterproof touch, driving piezo buzzer for status tones, and updating OLED display via SPI (SCK00/SCL00). Use Value: Integrated PCLBUZ0 and CTSU reduce EMI susceptibility vs. external drivers - meets IEC 60335 Class II safety requirements without shielding. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar 16-bit microcontroller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| R5F1211CASP#50 | Same package and pinout; 32 KB code flash (vs. 16 KB), identical peripherals and temp grade | Required when firmware exceeds 16 KB or future-proofing for feature expansion is needed | Select if bootloader, crypto stack, or GUI assets demand >16 KB flash; otherwise R5F1211AASP#50 optimizes cost |
| RL78/G14 R5F104BAASP#50 | Legacy RL78/G14 family; 16 KB flash, 2 KB RAM, but no CTSU, fewer timers (4× 16-bit), and no RTC calendar | Suitable for non-touch, non-calendar applications like basic motor control or LED lighting | Choose only if CTSU and RTC are unnecessary - R5F1211AASP#50 adds HMI capability without footprint change |
Compared with R5F1211CASP#50, the R5F1211AASP#50 saves flash cost and power in fixed-function designs; compared with RL78/G14 R5F104BAASP#50, it adds production-ready touch and calendar features without increasing PCB area or pin count.
Availability
R5F1211AASP#50 is available at Aetrix Electronics and suitable for home appliance control panels, smart thermostats, wireless remotes, personal care device UIs, and battery-powered HMI systems requiring stable component supply and long-lifecycle support.
Supply support for R5F1211AASP#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 consumer markets.
The RL78/G16 product line targets cost-sensitive, ultra-low-power consumer and industrial HMI applications, integrating capacitive touch, RTC, and high-accuracy on-chip oscillators to minimize external components.
FAQ
What is the maximum operating frequency and instruction timing of the R5F1211AASP#50?
The R5F1211AASP#50 supports a maximum high-speed operation of 16 MHz using its on-chip oscillator, delivering a minimum instruction execution time of 0.0625 μs. At ultra-low-speed mode (32.768 kHz subsystem clock), the minimum instruction time is 30.5 μs - enabling precise low-power timing for RTC and wake-up events. Both modes are fully supported on the R5F1211AASP#50 without external clock sources.
Does the R5F1211AASP#50 support in-circuit debugging, and which pins are used?
Yes, the R5F1211AASP#50 supports full in-circuit debugging via the on-chip debug interface using dedicated TOOL0 (P40) and TOOLRxD/TOOLTxD (P01/P00) pins. These pins provide asynchronous serial communication for programming and real-time trace, and remain functional as GPIO or peripherals after debug session ends - no dedicated debug header required.
How many capacitive touch channels does the R5F1211AASP#50 support, and what electrode configurations are possible?
The R5F1211AASP#50 integrates a 15-channel Capacitive Touch Sensing Unit (CTSU) supporting both self-capacitance (one electrode per key, up to 15 keys) and mutual-capacitance (matrix configuration using transmit/receive pin selection from 15 pins, up to 16 keys). Electrodes connect directly to P02, P03, P04, and other designated TSxx pins - no external components needed for baseline operation.
What are the flash memory characteristics of the R5F1211AASP#50, including erase granularity and rewrite endurance?
The R5F1211AASP#50 contains 16 KB of code flash memory organized in 1 KB blocks. Erase must be performed per block before writing; partial-block writes are not supported. Data flash is separate (1 KB, 512 B blocks) with 1,000,000 write/erase cycles (typical) at VDD = 2.4–5.5 V. Self-programming is supported, but background operation (BGO) is not - code execution halts during data flash writes.
Is the R5F1211AASP#50 pin-compatible with other RL78/G16 variants in the same package?
Yes, the R5F1211AASP#50 is pin-compatible with all other 10-pin LSSOP RL78/G16 variants including R5F1211CASP#50, R5F1211AGSP#50, and R5F1211AMSP#50. Differences are limited to flash size (16 KB vs. 32 KB), operating temperature grade (A: −40°C to +85°C), and internal oscillator accuracy - no PCB redesign is needed when migrating between these part numbers.
R5F1211AASP#50 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Renesas
- Package/Case:
- 10-LSSOP (0.173", 4.40mm Width)
- 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:
- 7
- 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 4x8/10b
- Oscillator Type:
- External, Internal
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
R5F1211AASP#50 FAQ
1.How can I place an order for R5F1211AASP#50 through Aetrix?
Please submit a Request for Quotation (RFQ) for R5F1211AASP#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 R5F1211AASP#50 reliable?
The price and inventory of R5F1211AASP#50 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for R5F1211AASP#50 is usually 5 days.
3.What payment methods are accepted for R5F1211AASP#50?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for R5F1211AASP#50 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for R5F1211AASP#50?
R5F1211AASP#50 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your R5F1211AASP#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 R5F1211AASP#50?
For technical support, including R5F1211AASP#50 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your R5F1211AASP#50 requirements.
6.How does Aetrix verify that R5F1211AASP#50 is sourced from the original manufacturer or authorized distributors?
All R5F1211AASP#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 R5F1211AASP#50 meets industry standards.
7.What is the process for return or replacement of R5F1211AASP#50?
All R5F1211AASP#50 units undergo pre-shipment inspection (PSI). If there is an issue with R5F1211AASP#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 R5F1211AASP#50 part is unused and in its original packaging.
Return procedure for R5F1211AASP#50:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
R5F1211AASP#50 Tags
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