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Renesas R5F102A8ASP#10
- Part No.:
- R5F102A8ASP#10
- Manufacturer:
- Renesas
- Category:
- Microcontrollers
- Package:
- 30-LSSOP (0.240", 6.10mm Width)
- Datasheet:
-
R5F102A8ASP#10.pdf
- Description:
- IC MCU 16BIT 8KB FLASH 30LSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:1,235
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Product details
Overview
R5F102A8ASP#10 from Renesas Electronics is a 30-pin LSSOP-packaged RL78/G12 16-bit MCU with 8 KB code flash, 2 KB data flash, and 512 B RAM, operating at 1.8–5.5 V and delivering 31 DMIPS at 24 MHz. It integrates an 8-channel 10-bit ADC, dual UART/CSI/I²C serial interfaces, 8-channel TAU timer, DMA controller, and CRC engine - deployed in battery-powered industrial sensor nodes requiring low-power operation and on-the-fly data logging.
For engineers reviewing the R5F102A8ASP#10 datasheet, R5F102A8ASP#10 pinout, R5F102A8ASP#10 application, or R5F102A8ASP#10 equivalent, key selection considerations include its 2 KB data flash with background operation (BGO), 63 μA/MHz active current, 30-pin LSSOP package with REGC regulator capacitor support, and A-grade temperature range (−40°C to +85°C) for consumer and industrial edge devices.
Technical Context
The R5F102A8ASP#10 implements the RL78 CPU core with 3-stage pipeline CISC architecture, 1 MB address space, and configurable instruction timing (0.04167 μs min @ 24 MHz). Its clock system combines high-speed on-chip oscillator (±1.0% accuracy from −20°C to +85°C), low-speed 15 kHz on-chip oscillator, and external crystal support up to 20 MHz via X1/X2 pins.
Peripheral integration includes two SAU channels supporting UART/CSI/I²C protocols, 8-channel TAU0 timer with PWM capability, 12-bit interval timer, window watchdog, and dedicated hardware for BCD correction and multiply-accumulate operations - all managed through vectored interrupt sources (26 internal, 6 external) and on-chip debug interface.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Core Architecture | RL78 16-bit CISC with 3-stage pipeline; enables deterministic real-time control with 31 DMIPS @ 24 MHz |
| Memory Configuration | 8 KB code flash (1 KB block size), 2 KB data flash (1M rewrite cycles, BGO enabled), 512 B RAM |
| Power Efficiency | 63 μA/MHz active current; HALT/STOP/SNOOZE modes support sub-μA sleep for battery longevity |
| Analog Peripherals | 10-bit ADC with 8 input channels, internal 1.45 V reference, and integrated temperature sensor |
| Serial Interfaces | 1 UART, 1 simplified SPI (CSI), 1 simplified I²C - all configurable via PIOR register for flexible pin mapping |
| Timer System | 8-channel 16-bit TAU timer with PWM output capability; 12-bit interval timer; window watchdog timer |
| Operating Range | 1.8–5.5 V supply; −40°C to +85°C ambient (A-grade); REGC pin requires 0.47–1 μF capacitor to VSS |
Pinout & Package
Package: 30-pin plastic LSSOP (7.62 mm, 0.65-mm pitch), RoHS-compliant, surface-mountable with exposed pad not present (unlike HWQFN variants).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD / VSS | Power supply / Ground | Dual power rails; REGC must be decoupled to VSS with 0.47–1 μF capacitor for stable internal regulator |
| P10–P17, P20–P23, P30–P31, P40, P50–P51, P60–P61, P120–P122, P137, P147 | General-purpose I/O ports | 26 total I/Os; includes N-ch open-drain (VDD-tolerant) and TTL-input buffers; supports key interrupt (KR0–KR9) |
| ANI0–ANI3, ANI16–ANI19 | Analog inputs | 8-channel ADC input; AVREFP/AVREFM provide differential reference; supports internal temperature sensing |
| X1 / X2 / EXCLK | Crystal oscillator / External clock input | Supports 1–20 MHz crystal; EXCLK allows external clock injection; oscillator stabilization verified via OSTC register |
| RESET / TOOL0 / TOOLRxD / TOOLTxD | Reset and debug interface | Active-low RESET pin; TOOL0/RxD/TxD enable on-chip debug without external emulator; no JTAG |
Key Features
| Feature | Design Value |
|---|---|
| True low-power platform | 63 μA/MHz active current + SNOOZE mode enables <1 μA retention with RAM wake-up on peripheral event |
| Data flash with BGO | 2 KB data flash supports background rewriting while executing code from main flash - critical for firmware-over-the-air updates |
| Hardware CRC engine | Dedicated CRC module accelerates checksum calculation for communication packets or flash integrity verification |
| Peripheral I/O redirection (PIOR) | Allows dynamic remapping of UART/CSI/I²C functions to alternate pins - simplifies PCB layout and avoids signal congestion |
| On-chip voltage detector (LVD) | 12-level programmable LVD with interrupt/reset options prevents brown-out corruption during battery sag or supply transients |
Applications
| Industrial Sensor Node | Smart Home Controller |
|---|---|
Use Scenario: Battery-powered temperature/humidity sensor with wireless telemetry and local data buffering. IC Role / Device Role / Timing Role: Main controller managing ADC sampling, data flash logging, UART-to-Bluetooth bridge, and ultra-low-power sleep scheduling. Use Value: 2 KB data flash with BGO enables seamless firmware updates and secure event logging without halting sensor operation. |
Use Scenario: Central hub coordinating Zigbee/Z-Wave peripherals, LED status indicators, and touch-key user interface. IC Role / Device Role / Timing Role: System orchestrator handling multi-protocol serial bridging, key scan matrix, buzzer feedback, and real-time clock management. Use Value: 26 GPIOs with KR0–KR9 key return and PCLBUZ0/1 outputs eliminate external key scan ICs and driver components. |
| Portable Medical Monitor | Energy Meter Interface Module |
Use Scenario: Handheld pulse oximeter with analog front-end, OLED display driver, and USB-C charging detection. IC Role / Device Role / Timing Role: Signal acquisition controller interfacing photodiode ADC, driving display via SPI, and monitoring VBUS with analog comparator. Use Value: Integrated 10-bit ADC with internal reference and temperature sensor reduces BOM cost and calibration complexity. |
Use Scenario: DIN-rail mounted meter add-on board performing RS-485 Modbus communication and tamper detection. IC Role / Device Role / Timing Role: Protocol translator between metrology ASIC and isolated RS-485 transceiver, with CRC-verified packet framing. Use Value: Hardware CRC engine ensures error-free command/response integrity over noisy industrial bus environments. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microcontroller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| R5F102A7ASP#10 | 4 KB code flash, 2 KB data flash, 256 B RAM - reduced memory footprint | Suitable for simpler sensor firmware with minimal data buffering needs | Select when application code size <4 KB and RAM usage <256 B; retains identical peripheral set and pinout |
| R5F103A8ASP#10 | No data flash; ±5.0% on-chip oscillator accuracy; no DMA or CRC; only 1 UART/CSI/I²C channel | Limited to basic control tasks without field-upgradable data storage or high-accuracy timing | Choose for cost-sensitive designs where data logging and hardware CRC are unnecessary |
Compared with R5F102A8ASP#10, R5F102A7ASP#10 offers identical low-power features and peripherals at lower memory cost, while R5F103A8ASP#10 sacrifices data flash, DMA, and precision timing for reduced unit price - making the R5F102A8ASP#10 optimal for applications requiring robust firmware update capability and hardware-assisted data integrity.
Availability
R5F102A8ASP#10 is available at Aetrix Electronics and suitable for industrial sensor nodes, smart home controllers, portable medical monitors, and energy meter interface modules requiring stable component supply across extended product lifecycles.
Supply support for R5F102A8ASP#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 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 family, including the R5F102A8ASP#10, was designed specifically for ultra-low-power general-purpose embedded control - balancing performance, memory flexibility, and analog integration for cost-sensitive, battery-operated edge devices.
FAQ
What is the maximum operating frequency and corresponding DMIPS rating for the R5F102A8ASP#10?
The R5F102A8ASP#10 achieves a maximum system clock of 24 MHz using its high-speed on-chip oscillator, delivering 31 DMIPS of processing performance. This rating is measured under standard conditions (VDD = 2.7–5.5 V, TA = −40°C to +85°C) and reflects the RL78 core's efficiency in executing 16-bit instructions with 3-stage pipelining. The R5F102A8ASP#10 maintains this performance across its full 1.8–5.5 V supply range.
Does the R5F102A8ASP#10 support background data flash rewriting while executing application code?
Yes, the R5F102A8ASP#10 supports Background Operation (BGO) for its 2 KB data flash memory. This allows the CPU to execute instructions from code flash while simultaneously erasing or programming data flash sectors - essential for reliable firmware updates and non-volatile parameter storage without interrupting real-time operation. The R5F102A8ASP#10 implements this using dedicated flash control hardware and library support per RL78 Family Data Flash Library Type04.
What are the absolute maximum ratings for the REGC pin on the R5F102A8ASP#10?
The REGC pin on the R5F102A8ASP#10 has an absolute maximum input voltage rating of −0.3 V to +2.0 V relative to VSS, and −0.3 V to VDD + 0.3 V. It must be connected to VSS via a 0.47–1.0 μF capacitor; applying voltage directly to REGC violates absolute maximum ratings and risks permanent damage. This specification is explicitly defined in the RL78/G12 datasheet Section 2.1 Absolute Maximum Ratings and applies uniquely to 30-pin LSSOP variants like the R5F102A8ASP#10.
How many serial communication interfaces does the R5F102A8ASP#10 support, and what types are they?
The R5F102A8ASP#10 supports three serial interface types: one UART channel, one simplified SPI (CSI) channel, and one simplified I²C channel - all implemented within the SAU0 peripheral. These interfaces share pins and are configurable via the Peripheral I/O Redirection Register (PIOR), enabling flexible routing to different port pins. Unlike 20/24-pin variants, the 30-pin R5F102A8ASP#10 does not support dual CSI or dual I²C instances.
Is the R5F102A8ASP#10 pin-compatible with other RL78/G12 30-pin variants such as R5F102AAASP#10?
Yes, the R5F102A8ASP#10 is pin-compatible with all RL78/G12 30-pin LSSOP variants including R5F102AAASP#10, R5F102A9ASP#10, and R5F102A7ASP#10. They share identical 30-pin LSSOP package (PLSP0030JB-B), identical pin functions, and identical electrical characteristics. Memory differences (16 KB vs. 8 KB vs. 4 KB code flash) do not affect pin behavior, allowing drop-in replacement in PCB layouts where firmware accommodates memory size variation.
R5F102A8ASP#10 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:
- 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#10 FAQ
1.How can I place an order for R5F102A8ASP#10 through Aetrix?
Please submit a Request for Quotation (RFQ) for R5F102A8ASP#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 R5F102A8ASP#10 reliable?
The price and inventory of R5F102A8ASP#10 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for R5F102A8ASP#10 is usually 5 days.
3.What payment methods are accepted for R5F102A8ASP#10?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for R5F102A8ASP#10 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for R5F102A8ASP#10?
R5F102A8ASP#10 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your R5F102A8ASP#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 R5F102A8ASP#10?
For technical support, including R5F102A8ASP#10 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your R5F102A8ASP#10 requirements.
6.How does Aetrix verify that R5F102A8ASP#10 is sourced from the original manufacturer or authorized distributors?
All R5F102A8ASP#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 R5F102A8ASP#10 meets industry standards.
7.What is the process for return or replacement of R5F102A8ASP#10?
All R5F102A8ASP#10 units undergo pre-shipment inspection (PSI). If there is an issue with R5F102A8ASP#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 R5F102A8ASP#10 part is unused and in its original packaging.
Return procedure for R5F102A8ASP#10:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
R5F102A8ASP#10 Tags
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