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Renesas R5F102A8ASP#50
- Part No.:
- R5F102A8ASP#50
- Manufacturer:
- Renesas
- Category:
- Microcontrollers
- Package:
- 30-LSSOP (0.240", 6.10mm Width)
- Datasheet:
-
R5F102A8ASP#50.pdf
- Description:
- IC MCU 16BIT 8KB FLASH 30LSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:4,154
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Product details
Overview
R5F102A8ASP#50 from Renesas Electronics is a 30-pin LSSOP packaged RL78/G12 16-bit microcontroller designed for ultra-low-power embedded control in consumer-grade applications (–40°C to +85°C). It integrates 8 KB code flash, 2 KB data flash, 512 B RAM, a 10-bit 8-channel ADC, and dual UART/CSI/I²C serial interfaces - enabling compact sensor node and appliance control designs with background data flash rewriting capability.
For engineers reviewing the R5F102A8ASP#50 datasheet, R5F102A8ASP#50 pinout, R5F102A8ASP#50 application, or R5F102A8ASP#50 equivalent, this page delivers verified specifications, real-world use scenarios, validated alternatives, and supply-chain support tailored for industrial OEMs and connected-device developers requiring long-lifecycle, low-voltage (1.8–5.5 V) MCU solutions.
Technical Context
The R5F102A8ASP#50 implements the RL78 CPU core with 3-stage pipeline CISC architecture, delivering 31 DMIPS at 24 MHz while consuming only 63 μA/MHz. Its peripheral set includes an 8-channel 10-bit ADC with internal 1.45 V reference, two independent UART channels (UART0 and UART1), one CSI channel, one I²C channel, and eight 16-bit TAU timer channels supporting PWM output.
It features dual flash memory architecture: 8 KB code flash (1 KB block size) with self-programming and flash shield window security, plus 2 KB data flash with background operation (BGO) and 1,000,000 write cycles (TYP). Power management includes HALT, STOP, and SNOOZE modes, on-chip POR/LVD, and high-accuracy ±1.0% high-speed on-chip oscillator (1–24 MHz).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Core Architecture | RL78 16-bit CISC CPU with 3-stage pipeline; enables deterministic real-time control at 31 DMIPS @ 24 MHz |
| Memory Configuration | 8 KB code flash (1 KB erase blocks) + 2 KB data flash (BGO enabled) + 512 B RAM - supports firmware updates and parameter logging without halting execution |
| Operating Voltage | 1.8 V to 5.5 V - allows direct battery operation (e.g., 2×AA, Li-ion, or 3.3 V/5 V rails) without external regulators |
| Analog Peripherals | 10-bit 8-channel ADC with internal 1.45 V reference and temperature sensor - eliminates need for external voltage references in thermal monitoring |
| Serial Interfaces | UART0 + UART1 + 1×CSI + 1×I²C - enables simultaneous host communication, sensor bus connectivity, and legacy protocol bridging |
| Power Modes | HALT (63 μA/MHz), STOP (0.52 μA), SNOOZE (low-power wake-up with peripheral activity) - extends battery life in intermittent-sensing applications |
| Package & Pin Count | LSSOP-30 (7.62 mm × 4.4 mm, 0.65 mm pitch) with 26 GPIO - provides compact footprint and sufficient I/O for multi-sensor control panels |
Pinout & Package
LSSOP-30 package (PLSP0030JB-B), 7.62 mm × 4.4 mm, 0.65 mm pitch, exposed pad not present. Compatible with standard reflow profiles for lead-free assembly.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| P10/SCK00/SCL00 | Serial clock I/O | Configurable as CSI00 clock or I²C00 clock - supports dual-mode peripheral sharing to reduce pin count |
| P11/SI00/RxD0/SDA00 | Serial data input / UART receive / I²C data | Multi-function pin enabling UART0, CSI00, or I²C00 slave operation - simplifies board routing via software-selectable mode |
| P12/SO00/TxD0/TOOLTxD | Serial data output / UART transmit / debug TX | Shared UART0 transmit and on-chip debug interface - eliminates need for separate debug header in production units |
| P13/TxD2/SO20/SDAA0 | UART2 TX / CSI20 output / I²C00 data | Enables concurrent UART2 and I²C00 master operation - supports isolated communication paths for safety-critical subsystems |
| P14/RxD2/SI20/SDA20 | UART2 RX / CSI20 input / I²C00 data | Independent UART2 receive path with hardware flow control - ideal for RS-485 or modem interfacing without CPU overhead |
| P20/ANI0/AVREFP | Analog input / ADC reference positive | Dedicated AVREFP pin ensures stable ADC reference - critical for precision measurement accuracy across voltage/temperature ranges |
| P21/ANI1/AVREFM | Analog input / ADC reference negative | AVREFM pin enables true differential ADC measurements - supports ratiometric sensor conditioning without external op-amps |
| RESET | Active-low reset input | Accepts both external push-button and internal LVD/POR reset sources - ensures robust power-on initialization and brown-out recovery |
Key Features
| Feature | Design Value |
|---|---|
| Background Data Flash Operation (BGO) | Executes application code from program memory while rewriting 2 KB data flash - enables seamless field firmware updates and runtime parameter storage |
| High-Accuracy On-Chip Oscillator | ±1.0% frequency stability (–20°C to +85°C) - eliminates external crystal for cost-sensitive timing-critical applications like remote controls and smart meters |
| Dual UART with Independent Clocking | UART0 and UART1 operate simultaneously with separate baud rate generators - supports concurrent host telemetry and local device configuration |
| Hardware CRC Engine | Integrated CRC-16/32 calculation unit - accelerates firmware integrity checks and secure boot verification without CPU load |
| RAM Guard & SFR Protection | Prevents accidental overwrites of critical RAM and peripheral registers - enhances reliability in noisy industrial environments |
| Low-Voltage Detection (LVD) | 12 programmable voltage thresholds (1.88–4.06 V) with interrupt/reset selection - enables graceful shutdown before data corruption occurs |
Applications
| Smart Appliance Control | Industrial Sensor Node |
|---|---|
Use Scenario: Microcontroller in washing machine main control board managing motor drive, water valve sequencing, and user interface. IC Role / Device Role / Timing Role: Primary system controller executing real-time PID motor control, ADC-based current sensing, and UART-driven display updates. Use Value: 8 KB flash stores full motor control firmware; 2 KB data flash logs fault history; 10-bit ADC resolves current ripple at 1.8 V supply - reducing BOM cost vs. external ADC + EEPROM. |
Use Scenario: Battery-powered environmental monitor measuring temperature, humidity, and CO₂ in HVAC ducts. IC Role / Device Role / Timing Role: Low-power data acquisition hub with periodic wake-up, multi-sensor polling, and LoRaWAN packet formatting. Use Value: SNOOZE mode draws <1 μA during sleep; integrated temperature sensor and 8-channel ADC eliminate discrete analog front-end; UART1 connects directly to LoRa module. |
| Consumer Remote Control Hub | Medical Wearable Interface |
Use Scenario: IR-to-BLE bridge in universal remote controlling TVs, soundbars, and streaming devices. IC Role / Device Role / Timing Role: Protocol translator with IR demodulation, command parsing, and BLE HCI packet generation. Use Value: Dual UART enables simultaneous IR RX and BLE UART interface; 30-pin LSSOP fits compact PCB; ±1% on-chip oscillator meets IR carrier tolerance without crystal. |
Use Scenario: Pulse oximeter wristband collecting PPG signals, calculating SpO₂, and transmitting results via Bluetooth. IC Role / Device Role / Timing Role: Analog signal conditioner and algorithm engine using ADC oversampling, digital filtering, and UART-to-BLE forwarding. Use Value: Internal 1.45 V reference stabilizes ADC gain across battery discharge; 512 B RAM accommodates real-time FFT buffers; STOP mode extends battery life to >7 days. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microcontroller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| R5F102A7ASP#50 | 4 KB code flash, 2 KB data flash, 256 B RAM - reduced memory capacity | Suitable for simpler control tasks without data logging or complex UI logic | Select when firmware size <4 KB and no background data storage required |
| R5F103A8ASP#50 | No data flash; DMA disabled; ±5.0% oscillator accuracy; fewer serial channels (no UART1/CSI20/I²C20) | Lower-cost variant for basic UART-only communication and non-critical timing | Choose for cost-sensitive, single-interface applications where BGO and high-precision timing are unnecessary |
Compared with R5F102A7ASP#50, the R5F102A8ASP#50 doubles code flash and RAM for richer feature sets; versus R5F103A8ASP#50, it adds data flash BGO, tighter oscillator tolerance, and expanded serial connectivity - making it optimal for field-upgradable, sensor-rich, and timing-sensitive designs.
Availability
R5F102A8ASP#50 is available at Aetrix Electronics and suitable for smart appliance control, industrial sensor nodes, consumer remote hubs, medical wearable interfaces, and battery-powered IoT edge devices requiring stable component supply and long-term manufacturability.
Supply support for R5F102A8ASP#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 Japanese semiconductor manufacturer specializing in microcontrollers, analog, and power management ICs 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 general-purpose embedded control applications - emphasizing energy efficiency, integrated peripherals, and simplified development.
FAQ
What is the maximum operating frequency and power consumption of the R5F102A8ASP#50?
The R5F102A8ASP#50 operates up to 24 MHz with a true low-power platform achieving 63 μA/MHz active current. At 24 MHz and 3.3 V, typical active current is ~1.5 mA. In STOP mode, it draws just 0.52 μA - enabling multi-year battery life in intermittent-sensing applications. These values are measured per Renesas R01DS0193EJ0250 Rev.2.50 specification.
Does the R5F102A8ASP#50 include data flash memory, and what is its endurance?
Yes, the R5F102A8ASP#50 includes 2 KB of dedicated data flash memory supporting background operation (BGO). It guarantees 1,000,000 write/erase cycles (TYP) across the full 1.8–5.5 V VDD range, enabling reliable parameter storage and firmware update staging without halting application execution.
How many UART interfaces does the R5F102A8ASP#50 support, and are they independent?
The R5F102A8ASP#50 supports two fully independent UART interfaces: UART0 (P11/P12) and UART1 (P00/P01). Each has its own baud rate generator, FIFO, and interrupt vector - allowing simultaneous communication with a host MCU and a peripheral module (e.g., BLE or LoRa) without resource contention.
What package type and pin count does the R5F102A8ASP#50 use?
The R5F102A8ASP#50 uses a 30-pin plastic LSSOP package (PLSP0030JB-B), measuring 7.62 mm × 4.4 mm with 0.65 mm pitch. It provides 26 GPIO pins, including 8 analog inputs, multiple timer outputs, and configurable serial function pins - balancing density, thermal performance, and hand-solderability.
Is the R5F102A8ASP#50 qualified for industrial temperature range?
No - the R5F102A8ASP#50 is rated for consumer applications with an operating ambient temperature range of –40°C to +85°C (suffix "A"). For industrial-grade operation up to +105°C, Renesas offers the R5F102A8GSP#50 (suffix "G"), which shares identical electrical and functional specifications but is qualified to the extended temperature grade.
R5F102A8ASP#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:
- 8KB (8K x 8)
- Program Memory Type:
- FLASH
- EEPROM Size:
- 2K x 8
- RAM Size:
- 768 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:
R5F102A8ASP#50 FAQ
1.How can I place an order for R5F102A8ASP#50 through Aetrix?
Please submit a Request for Quotation (RFQ) for R5F102A8ASP#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 R5F102A8ASP#50 reliable?
The price and inventory of R5F102A8ASP#50 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for R5F102A8ASP#50 is usually 5 days.
3.What payment methods are accepted for R5F102A8ASP#50?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for R5F102A8ASP#50 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for R5F102A8ASP#50?
R5F102A8ASP#50 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your R5F102A8ASP#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 R5F102A8ASP#50?
For technical support, including R5F102A8ASP#50 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your R5F102A8ASP#50 requirements.
6.How does Aetrix verify that R5F102A8ASP#50 is sourced from the original manufacturer or authorized distributors?
All R5F102A8ASP#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 R5F102A8ASP#50 meets industry standards.
7.What is the process for return or replacement of R5F102A8ASP#50?
All R5F102A8ASP#50 units undergo pre-shipment inspection (PSI). If there is an issue with R5F102A8ASP#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 R5F102A8ASP#50 part is unused and in its original packaging.
Return procedure for R5F102A8ASP#50:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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