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Renesas R5F102AAASP#50
- Part No.:
- R5F102AAASP#50
- Manufacturer:
- Renesas
- Category:
- Microcontrollers
- Package:
- 30-LSSOP (0.240", 6.10mm Width)
- Datasheet:
-
R5F102AAASP#50.pdf
- Description:
- IC MCU 16BIT 16KB FLASH 30LSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:2,899
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Product details
Overview
R5F102AAASP#50 from Renesas Electronics is a 30-pin LSSOP packaged 16-bit RL78/G12 microcontroller designed for ultra-low-power embedded control in consumer-grade applications (–40°C to +85°C). It integrates 16 KB code flash, 2 KB data flash, 2 KB RAM, a 24 MHz high-accuracy on-chip oscillator (±1.0% over –20°C to +85°C), and an 8-channel 10-bit A/D converter - enabling compact, battery-operated sensor interface and appliance control systems.
For engineers reviewing the R5F102AAASP#50 datasheet, R5F102AAASP#50 pinout, R5F102AAASP#50 application, or R5F102AAASP#50 equivalent, this page delivers verified specifications, validated peripheral mapping, real-world use scenarios for home automation and industrial HMI, and two confirmed alternative parts with documented functional and packaging differences.
Technical Context
The R5F102AAASP#50 implements the RL78 CPU core with CISC architecture and 3-stage pipeline, delivering 31 DMIPS at 24 MHz while maintaining true low-power operation (63 μA/MHz). Its memory subsystem includes 16 KB code flash with 1 KB block erase, 2 KB background-operable data flash (1M rewrite cycles), and 2 KB RAM - all supporting self-programming via flash shield window.
Peripherals include 8-channel TAU timer (with PWM capability), UART0/UART1/UART2, CSI00/CSI11/CSI20, IIC00/IIC11/IIC20, 2-channel DMA, CRC engine, and key interrupt support across 6–10 pins. All operate within 1.8–5.5 V supply range and are fully compatible with the RL78/G12 family's peripheral I/O redirection register (PIOR) for flexible pin assignment.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Core Architecture | RL78 16-bit CISC CPU with 3-stage pipeline, 1 MB address space |
| Operating Voltage | 1.8 V to 5.5 V - enables direct Li-ion battery (3.0–4.2 V) or single-cell alkaline (1.8–3.0 V) operation without external regulators |
| Flash Memory | 16 KB code flash + 2 KB data flash - supports firmware updates and nonvolatile parameter storage with background operation |
| ADC Resolution | 10-bit A/D converter with 8 input channels - provides sufficient resolution for temperature, voltage, and sensor signal digitization |
| Timer Resources | 8-channel 16-bit TAU timer with PWM output capability - suitable for motor control, LED dimming, and timing-critical I/O |
| Oscillator Accuracy | High-speed on-chip oscillator ±1.0% (–20°C to +85°C) - eliminates need for external crystal in cost-sensitive designs |
| Package & Pins | LSSOP-30 (7.62 mm × 4.4 mm, 0.65 mm pitch) with 26 total I/O - fits compact PCB layouts while supporting multi-protocol serial interfaces |
Pinout & Package
Package: 30-pin plastic LSSOP (7.62 mm × 4.4 mm, 0.65 mm pitch), RoHS-compliant, tape-and-reel (#X0, #50).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| P10/SCK00/SCL00 | Serial Clock Input/Output | Primary CSI/I²C clock line; configurable via PIOR for dual-role use in multi-interface systems |
| P11/SI00/RxD0/SDA00 | Serial Data Input / UART Receive / I²C Data | Shared function pin supporting SPI slave, UART0 receive, or I²C0 data - reduces pin count in protocol-mixed designs |
| P12/SO00/TxD0/TOOLTxD | Serial Data Output / UART Transmit / Debug TX | Enables simultaneous UART communication and on-chip debug output without dedicated debug header |
| P13/TxD2/SO20/SDAA0 | UART2 Transmit / CSI20 Output / I²C0 Data | Multi-protocol pin supporting secondary UART, third SPI channel, or alternate I²C data path |
| P14/RxD2/SI20/SDA20 | UART2 Receive / CSI20 Input / I²C2 Data | Enables full-duplex UART2 or independent I²C2 bus alongside primary I²C0 interface |
| P20/ANI0/AVREFP | Analog Input / ADC Reference Positive | Serves as first ADC channel and positive reference source - improves measurement accuracy when used with internal AVREFM |
| P21/ANI1/AVREFM | Analog Input / ADC Reference Negative | Provides differential reference pair with P20; enables ratiometric sensing and noise rejection in analog front-ends |
| RESET | Active-Low Reset Input | Accepts external reset pulse or internal POR/LVD assertion; supports both hardware and software-initiated recovery |
| REGC | Voltage Regulator Capacitor Terminal | Requires 0.47–1 µF capacitor to VSS - stabilizes internal regulator for reliable low-voltage operation down to 1.8 V |
| VDD / VSS | Power Supply / Ground | Dual power pins ensure stable core and I/O domain operation; decoupling recommended per Renesas layout guidelines |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low power HALT/STOP/SNOOZE modes | Reduces active current to 63 μA/MHz and standby current to sub-μA levels - extends battery life in portable devices |
| 2 KB data flash with background operation (BGO) | Allows real-time firmware parameter updates without halting program execution - critical for field-upgradable IoT endpoints |
| 2-channel DMA controller | Offloads CPU from memory-to-peripheral transfers (e.g., ADC → RAM, UART → buffer), freeing cycles for control algorithms |
| CRC calculation engine | Hardware-accelerated checksum generation for firmware integrity verification and communication packet validation |
| Peripheral I/O redirection (PIOR) | Enables dynamic remapping of up to 10 peripheral functions across 26 pins - simplifies PCB layout and supports design reuse |
| On-chip voltage detector (12-level LVD) | Configurable reset/interrupt thresholds from 1.88 V to 4.06 V - ensures safe brown-out response across wide supply ranges |
Applications
| Home Appliance Control | Industrial HMI Panel |
|---|---|
Use Scenario: Microcontroller in smart thermostat managing temperature sensing, display refresh, button inputs, and wireless module wake-up scheduling. IC Role / Device Role / Timing Role: Central system controller executing closed-loop HVAC logic, driving segment LCD via PCLBUZ outputs, and managing UART-based Wi-Fi/BLE co-processor communication. Use Value: Integrated 2 KB data flash stores calibration offsets and user preferences; 10-bit ADC resolves ±0.1°C thermal changes; low-power STOP mode extends battery life to >2 years. |
Use Scenario: Embedded controller in factory-floor operator panel handling touch-button scanning, LED status indication, RS-485 Modbus communication, and fault logging. IC Role / Device Role / Timing Role: Real-time I/O coordinator interfacing capacitive buttons (via KR0–KR9), driving LEDs with PWM timers, and buffering Modbus RTU frames via UART1/UART2. Use Value: 8-channel TAU timer enables independent LED dimming and button debounce; 26 I/O pins accommodate 12-key matrix + 6 status LEDs + 2 serial buses; 1.8–5.5 V operation tolerates unregulated 24 VDC supply with local LDO. |
| Portable Medical Sensor | Smart Lighting Node |
Use Scenario: Wearable pulse oximeter acquiring photodiode signals, computing SpO₂, storing session history, and transmitting via Bluetooth LE. IC Role / Device Role / Timing Role: Signal acquisition processor using 8-channel ADC for dual-wavelength photodiode inputs, running digital filter on 2 KB RAM, and managing BLE UART bridge via SAU0/SAU1 peripherals. Use Value: Background data flash writes preserve clinical session logs during continuous measurement; SNOOZE mode synchronizes ADC sampling with optical LED pulses to minimize power; ±1.0% oscillator ensures accurate BLE timing without external crystal. |
Use Scenario: DALI-compatible LED driver node controlling color temperature and intensity based on occupancy and ambient light readings. IC Role / Device Role / Timing Role: DALI master controller generating EN 62386-compliant differential signaling via UART0, reading ambient light via ANI0–ANI3, and modulating white/amber LEDs via 8-channel TAU PWM outputs. Use Value: Dual UART support enables DALI bus management and debug console simultaneously; programmable clock outputs (PCLBUZ0/PCLBUZ1) generate precise 200–1000 kHz LED switching frequencies; 16 KB flash accommodates DALI stack + lighting algorithm. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microcontroller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| R5F102A9ASP#50 | Same package and pinout; reduced 12 KB code flash and 1.5 KB data flash | Suitable for simpler firmware with smaller footprint and lower nonvolatile storage needs | Select when application code size remains under 12 KB and parameter storage requirements are ≤1.5 KB |
| R5F103AAASP#50 | Same 30-pin LSSOP package but no data flash; ±5.0% oscillator accuracy; no DMA or CRC | Targeted at cost-sensitive, non-upgradable products where background data writes and hardware checksums are unnecessary | Choose only if firmware is static, oscillator tolerance ≥±5.0% is acceptable, and DMA/CRC acceleration is not required |
Compared with R5F102AAASP#50, R5F102A9ASP#50 offers identical low-power features and peripheral set at reduced memory capacity, while R5F103AAASP#50 sacrifices data flash, oscillator precision, and safety peripherals to achieve lower unit cost - making it unsuitable for field-upgradable or safety-aware designs.
Availability
R5F102AAASP#50 is available at Aetrix Electronics and suitable for home appliance control, industrial HMI panels, portable medical sensors, and smart lighting nodes requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.
Supply support for R5F102AAASP#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 Corporation is a global semiconductor leader headquartered in Tokyo, Japan, specializing in microcontrollers, analog, power, and SoC solutions for automotive, industrial, and IoT markets.
The RL78/G12 product line delivers ultra-low-power 16-bit MCUs optimized for cost-sensitive, battery-operated, and energy-efficient embedded control applications - emphasizing integrated analog, flexible serial interfaces, and robust flash reliability.
FAQ
What is the maximum operating frequency and instruction throughput of the R5F102AAASP#50?
The R5F102AAASP#50 operates at up to 24 MHz using its high-speed on-chip oscillator, delivering 31 DMIPS performance. Its minimum instruction execution time is 0.04167 μs at 24 MHz, enabled by the RL78 CPU's 3-stage pipeline and CISC architecture. This throughput supports real-time control loops in motor drives and sensor fusion applications without external acceleration.
Does the R5F102AAASP#50 support in-system programming and secure firmware updates?
Yes, the R5F102AAASP#50 supports secure in-system programming via its self-programming capability with flash shield window function. The 2 KB data flash allows background operation (BGO), enabling firmware parameter updates during runtime. Code flash block protection prevents unauthorized erasure or rewriting, meeting basic security requirements for field-deployed devices.
How many serial communication interfaces does the R5F102AAASP#50 provide, and what protocols are supported?
The R5F102AAASP#50 provides three UART channels (UART0, UART1, UART2), three simplified SPI (CSI) channels (CSI00, CSI11, CSI20), and three I²C channels (IIC00, IIC11, IIC20). These are implemented via the SAU (Serial Array Unit) and support concurrent multi-protocol operation - for example, UART0 for debug, UART1 for Modbus, and IIC00 for sensor communication - all mapped flexibly via PIOR.
What is the role of the REGC pin on the R5F102AAASP#50, and how must it be connected?
The REGC pin on the R5F102AAASP#50 connects to the internal voltage regulator's stabilization capacitor. It must be tied to VSS through a 0.47–1 µF ceramic capacitor, as specified in the datasheet. Failure to do so risks unstable operation below 2.7 V and may cause erratic reset behavior or ADC inaccuracies - particularly critical in battery-powered applications where supply voltage droops.
Can the R5F102AAASP#50 operate reliably at 1.8 V, and what peripherals remain functional at that voltage?
Yes, the R5F102AAASP#50 is fully specified for 1.8 V operation across its entire temperature range (–40°C to +85°C). At 1.8 V, all core peripherals remain functional: 16 KB code flash, 2 KB data flash, 2 KB RAM, 8-channel 10-bit ADC, 8-channel TAU timer, UART0/1/2, CSI00/11/20, IIC00/11/20, and DMA. Only the high-speed on-chip oscillator is limited to 1–8 MHz in LS mode at 1.8 V.
R5F102AAASP#50 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Renesas
- Package/Case:
- 30-LSSOP (0.240", 6.10mm Width)
- Series:
- RL78/G12
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Programmable:
- Not Verified
- Core Processor:
- RL78
- Core Size:
- 16-Bit
- Speed:
- 24MHz
- Connectivity:
- CSI, I2C, UART/USART
- Peripherals:
- DMA, LVD, POR, PWM, WDT
- Number of I/O:
- 23
- Program Memory Size:
- 16KB (16K x 8)
- Program Memory Type:
- FLASH
- EEPROM Size:
- 2K x 8
- RAM Size:
- 2K x 8
- Voltage - Supply (Vcc/Vdd):
- 1.8V ~ 5.5V
- Data Converters:
- A/D 8x8/10b
- Oscillator Type:
- Internal
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
R5F102AAASP#50 FAQ
1.How can I place an order for R5F102AAASP#50 through Aetrix?
Please submit a Request for Quotation (RFQ) for R5F102AAASP#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 R5F102AAASP#50 reliable?
The price and inventory of R5F102AAASP#50 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for R5F102AAASP#50 is usually 5 days.
3.What payment methods are accepted for R5F102AAASP#50?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for R5F102AAASP#50 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for R5F102AAASP#50?
R5F102AAASP#50 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your R5F102AAASP#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 R5F102AAASP#50?
For technical support, including R5F102AAASP#50 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your R5F102AAASP#50 requirements.
6.How does Aetrix verify that R5F102AAASP#50 is sourced from the original manufacturer or authorized distributors?
All R5F102AAASP#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 R5F102AAASP#50 meets industry standards.
7.What is the process for return or replacement of R5F102AAASP#50?
All R5F102AAASP#50 units undergo pre-shipment inspection (PSI). If there is an issue with R5F102AAASP#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 R5F102AAASP#50 part is unused and in its original packaging.
Return procedure for R5F102AAASP#50:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
R5F102AAASP#50 Tags
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