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Renesas R5F102A9ASP#70
- Part No.:
- R5F102A9ASP#70
- Manufacturer:
- Renesas
- Category:
- Microcontrollers
- Package:
- 30-LSSOP (0.240", 6.10mm Width)
- Datasheet:
-
R5F102A9ASP#70.pdf
- Description:
- 16-BIT GENERAL MCU RL78/G12 12K
- Quantity:
- Payment:
- Shipping:
Inventory:3,075
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Product details
Overview
R5F102A9ASP#70 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, an 8-channel 10-bit A/D converter, and dual serial interfaces (UART + CSI/I²C) - enabling compact sensor node and appliance control designs with background data flash rewriting capability.
For engineers reviewing the R5F102A9ASP#70 datasheet, R5F102A9ASP#70 pinout, R5F102A9ASP#70 application, or R5F102A9ASP#70 equivalent, key selection considerations include its 2 KB on-chip data flash with 1M-cycle endurance, 30-pin LSSOP package with REGC regulator capacitor pin, 8-channel ADC with internal reference, and support for SNOOZE mode operation at 1.8 V - all critical for battery-powered IoT edge nodes and white-goods MCU replacements.
Technical Context
The R5F102A9ASP#70 implements the RL78 CPU core with 3-stage pipeline CISC architecture, delivering 31 DMIPS at 24 MHz while maintaining true low-power operation (63 μA/MHz). Its clock system combines a high-accuracy ±1.0% 24 MHz on-chip oscillator (–20°C to +85°C), 15 kHz low-speed oscillator, and external crystal support up to 20 MHz via X1/X2 pins.
Peripheral integration includes two DMA channels, CRC calculation unit, RAM/SFR guard for functional safety, and TAU timer array with 8 capture/compare channels - configured for PWM generation, interval timing, and input capture across multiple I/O ports including P0, P1, P2, P3, P4, P5, P6, P12, P13, and P14.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Core Architecture | RL78 16-bit CISC with 3-stage pipeline; executes instructions in 0.04167 µs @ 24 MHz |
| Memory | 16 KB code flash (1 KB blocks), 2 KB data flash (1M rewrite cycles), 2 KB RAM |
| ADC | 10-bit resolution, 8 input channels, internal 1.45 V reference, temperature sensor |
| Power Supply | 1.8 V to 5.5 V operation; HALT/STOP/SNOOZE low-power modes supported |
| Operating Temp | –40°C to +85°C (Consumer grade, 'A' suffix); REGC pin requires 0.47–1 µF VSS decoupling |
| Package | LSSOP-30 (7.62 mm, 0.65 mm pitch); exposed pad not present; pin 1 = P20/ANI0/AVREFP |
| Oscillator Accuracy | ±1.0% over –20°C to +85°C for high-speed on-chip oscillator (24 MHz option) |
Pinout & Package
LSSOP-30 plastic package (7.62 mm × 9.91 mm, 0.65 mm pitch), compliant with JEDEC MO-153, with no exposed thermal pad. Pin 1 marked by notch; pin numbering counterclockwise from top-left corner.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| P20/ANI0/AVREFP | Analog input / positive reference | Primary analog input channel 0; also supplies AVREF+ for ADC reference |
| P01/ANI16/TO00/RxD1 | Multi-function I/O | Configurable as UART1 receive, timer output, or analog input - enables flexible peripheral routing |
| REGC | Regulator capacitance | Must connect to VSS via 0.47–1 µF capacitor; stabilizes internal voltage regulator for analog/ADC stability |
| RESET | Active-low reset input | Asynchronous reset pin; accepts external pull-up; triggers POR/LVD-initiated reset sequences |
| P121/X1 & P122/X2 | Crystal oscillator inputs | Supports external crystal/resonator up to 20 MHz; required for precise timing-critical applications |
| P60/SCLA0 & P61/SDAA0 | I²C bus interface | Open-drain I²C clock/data pins with internal pull-up options; compatible with standard 100/400 kbps protocols |
Key Features
| Feature | Design Value |
|---|---|
| Background Data Flash Rewrite | Executes code from program memory while rewriting 2 KB data flash - enables firmware parameter updates without halting operation |
| Low-Power SNOOZE Mode | Permits UART/CSI wake-up from ultra-low-current state with full register retention - ideal for intermittent sensor polling |
| RAM & SFR Guard | Detects unintended writes to RAM or special function registers - enhances reliability in noise-prone industrial environments |
| CRC Calculation Unit | Hardware-accelerated CRC-16/CCITT-FALSE computation - offloads checksum processing from CPU for OTA update verification |
| Dual DMA Channels | Transfers data between SFR and RAM in 2 clocks per 8/16-bit word - reduces CPU load during ADC-to-memory or UART-to-buffer transfers |
Applications
| Smart Appliance Control | Wireless Sensor Node MCU |
|---|---|
Use Scenario: Microcontroller in washing machine main board managing motor drive, water level sensing, and UI display. IC Role / Device Role / Timing Role: Central control unit executing real-time PID motor control, reading 8-channel ADC for pressure/temperature sensors, and driving buzzer/clock outputs. Use Value: Integrated 2 KB data flash stores calibration offsets and usage logs; SNOOZE mode extends standby battery life between cycle events. |
Use Scenario: Battery-powered environmental monitor transmitting temperature/humidity via UART to BLE module. IC Role / Device Role / Timing Role: Sensor fusion hub acquiring analog data, performing local threshold checks, and waking UART only on event detection. Use Value: 63 μA/MHz active current and STOP mode <1 μA enable multi-year coin-cell operation; internal 1.45 V reference ensures ADC accuracy without external components. |
| Industrial HMI Panel | Home Automation Gateway |
Use Scenario: Touch-button interface panel with LED indicators and status reporting over UART to PLC. IC Role / Device Role / Timing Role: Key return scanner (KR0–KR9) with on-chip key interrupt handling; drives 2 programmable clock/buzzer outputs for feedback. Use Value: N-ch open-drain I/O (6 V tolerant) directly interfaces 3.3 V/5 V peripherals; 30-pin LSSOP provides sufficient I/O for button matrix + LED drivers. |
Use Scenario: Zigbee/Z-Wave coordinator translating commands between RF module and local wired sensors. IC Role / Device Role / Timing Role: Protocol bridge using UART0 for RF module and CSI00 for local SPI sensors; leverages dual DMA for zero-CPU packet forwarding. Use Value: Dual serial interfaces (UART + CSI/I²C) eliminate need for external level shifters; 16 KB flash accommodates dual-stack protocol firmware. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microcontroller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| R5F103A9ASP#70 | No data flash (0 KB); ±5.0% oscillator accuracy; no DMA or CRC; fewer serial interfaces (UART only) | Suitable for cost-sensitive, non-data-logging applications where flash self-programming is unnecessary | Select when BOM cost reduction outweighs field firmware update capability and precision timing needs |
| R5F102AAASP#70 | Same package and memory (16 KB/2 KB/2 KB), but rated for industrial temp range (–40°C to +105°C, 'G' suffix) | Required for under-hood automotive or factory-floor deployments exceeding +85°C ambient | Choose for extended temperature operation; otherwise identical functionality and pinout |
Compared with R5F103A9ASP#70, the R5F102A9ASP#70 adds field-updatable data storage and tighter timing control; versus R5F102AAASP#70, it trades industrial temperature rating for lower cost in consumer-grade environments - making it optimal for battery-powered appliances and smart home endpoints.
Availability
R5F102A9ASP#70 is available at Aetrix Electronics and suitable for smart appliance control, wireless sensor node design, industrial HMI panels, and home automation gateway development requiring stable component supply and long-term production continuity.
Supply support for R5F102A9ASP#70 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 Japanese semiconductor manufacturer 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 targeting cost-sensitive, battery-operated consumer and industrial control applications - emphasizing energy efficiency, integrated analog, and simplified development.
FAQ
What is the maximum operating frequency and instruction throughput of the R5F102A9ASP#70?
The R5F102A9ASP#70 supports a maximum high-speed on-chip oscillator frequency of 24 MHz, achieving 31 DMIPS performance. Its minimum instruction execution time is 0.04167 µs under 24 MHz operation, enabled by the RL78 CPU's 3-stage pipeline architecture. External crystal operation is limited to 20 MHz, yielding slightly lower throughput.
Does the R5F102A9ASP#70 support background data flash rewriting while executing application code?
Yes, the R5F102A9ASP#70 supports background operation (BGO) for its 2 KB data flash memory. This allows the CPU to execute instructions from code flash while simultaneously rewriting data flash - essential for storing runtime parameters, calibration data, or firmware update metadata without interrupting system operation.
What are the analog input capabilities of the R5F102A9ASP#70?
The R5F102A9ASP#70 features an 8-channel, 10-bit A/D converter with selectable resolution (8/10-bit), internal 1.45 V reference voltage, and integrated temperature sensor. Input channels include ANI0–ANI3 and ANI16–ANI19, supporting single-ended acquisition with VDD or internal reference as the upper limit.
How is the REGC pin used on the R5F102A9ASP#70, and what happens if it's left unconnected?
The REGC pin on the R5F102A9ASP#70 must be connected to VSS via a 0.47–1 µF capacitor to stabilize the internal voltage regulator. Leaving it unconnected risks unstable ADC performance, inaccurate analog measurements, and potential malfunction of internal analog circuitry - as confirmed in the RL78/G12 datasheet Section 1.4.3 and Absolute Maximum Ratings.
Is the R5F102A9ASP#70 pin-compatible with other RL78/G12 30-pin variants like R5F102AAASP#70?
Yes, the R5F102A9ASP#70 is pin-compatible with all RL78/G12 30-pin LSSOP variants including R5F102AAASP#70, R5F102A8ASP#70, and R5F102A7ASP#70. They share identical pin configuration, electrical characteristics, and package dimensions - differing only in memory size, temperature grade, and optional peripheral enablement per datasheet Table 1-1.
R5F102A9ASP#70 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Renesas
- Package/Case:
- 30-LSSOP (0.240", 6.10mm Width)
- Series:
- RL78/G12
- Packaging:
- Tray
- Product Status:
- Active
- Programmable:
- -
- 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:
- 12KB (12K x 8)
- Program Memory Type:
- FLASH
- EEPROM Size:
- 2K x 8
- RAM Size:
- 1K x 8
- Voltage - Supply (Vcc/Vdd):
- 1.8V ~ 5.5V
- Data Converters:
- A/D 8x8/10b
- Oscillator Type:
- External, Internal
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
R5F102A9ASP#70 FAQ
1.How can I place an order for R5F102A9ASP#70 through Aetrix?
Please submit a Request for Quotation (RFQ) for R5F102A9ASP#70 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 R5F102A9ASP#70 reliable?
The price and inventory of R5F102A9ASP#70 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for R5F102A9ASP#70 is usually 5 days.
3.What payment methods are accepted for R5F102A9ASP#70?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for R5F102A9ASP#70 transactions.
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4.How is shipping managed for R5F102A9ASP#70?
R5F102A9ASP#70 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your R5F102A9ASP#70 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 R5F102A9ASP#70?
For technical support, including R5F102A9ASP#70 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your R5F102A9ASP#70 requirements.
6.How does Aetrix verify that R5F102A9ASP#70 is sourced from the original manufacturer or authorized distributors?
All R5F102A9ASP#70 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 R5F102A9ASP#70 meets industry standards.
7.What is the process for return or replacement of R5F102A9ASP#70?
All R5F102A9ASP#70 units undergo pre-shipment inspection (PSI). If there is an issue with R5F102A9ASP#70, 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 R5F102A9ASP#70 part is unused and in its original packaging.
Return procedure for R5F102A9ASP#70:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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