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Renesas R5F102AAASP#70
- Part No.:
- R5F102AAASP#70
- Manufacturer:
- Renesas
- Category:
- Microcontrollers
- Package:
- 30-LSSOP (0.240", 6.10mm Width)
- Datasheet:
-
R5F102AAASP#70.pdf
- Description:
- 16-BIT GENERAL MCU RL78/G12 16K
- Quantity:
- Payment:
- Shipping:
Inventory:4,527
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Product details
Overview
R5F102AAASP#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, a 24 MHz high-accuracy on-chip oscillator (±1.0% over –20°C to +85°C), and an 8/10-bit 8-channel ADC - enabling battery-powered sensor nodes and smart home peripherals.
For engineers reviewing the R5F102AAASP#70 datasheet, R5F102AAASP#70 pinout, R5F102AAASP#70 application, or R5F102AAASP#70 equivalent, this page delivers verified technical context, validated pin functions, real-world use cases, and two confirmed alternative parts with documented functional and application-level differences.
Technical Context
The R5F102AAASP#70 implements the RL78 CPU core with a 3-stage CISC pipeline, supporting minimum instruction execution at 0.04167 µs (24 MHz on-chip oscillator) and full 1 MB address space. Its peripheral set includes TAU0 timer with 8 channels (7 PWM-capable), SAU0 serial array with UART0/CSI00/IIC00, and CRC calculation hardware - all operating under true low-power modes (HALT, STOP, SNOOZE) down to 63 μA/MHz.
It features dual-voltage operation (1.8 V to 5.5 V), on-chip power-on-reset and 12-level voltage detector, DMA controller with 2 channels, and background operation for data flash rewriting while executing code. The device supports key interrupt (10 inputs), programmable clock/buzzer output (PCLBUZ0/PCLBUZ1), and analog input with internal 1.45 V reference and temperature sensor.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Core Architecture | RL78 16-bit CISC CPU with 3-stage pipeline and 1 MB address space |
| Flash Memory | 16 KB code flash + 2 KB data flash with self-programming and BGO support |
| RAM Size | 2 KB on-chip RAM for stack, variables, and DMA buffers |
| Operating Voltage | 1.8 V to 5.5 V - enables direct interface with 1.8 V, 2.5 V, and 3.3 V peripherals |
| ADC Resolution | 8/10-bit A/D converter with 8 input channels and internal 1.45 V reference |
| Timer Resources | 8-channel 16-bit TAU with up to 7 PWM outputs and 12-bit interval timer |
| Oscillator Accuracy | ±1.0 % over –20°C to +85°C using high-speed on-chip oscillator (1–24 MHz) |
Pinout & Package
Package: 30-pin plastic LSSOP (7.62 mm, 0.65-mm pitch), JEDEC MO-153 compliant, thermal pad not present.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| P20/ANI0/AVREFP | Analog input / positive reference | Primary analog input channel 0; also supplies AVREF+ for ADC reference |
| P21/ANI1/AVREFM | Analog input / negative reference | Analog input channel 1; also supplies AVREF− for differential ADC mode |
| P10/SCK00/SCL00 | Serial clock I/O | Shared SPI clock (SCK00) and I²C clock (SCL00); configurable via PIOR |
| P11/SI00/RxD0/SDA00 | Serial data input / UART RX / I²C data | Multi-function pin supporting SPI input, UART receive, and I²C data line |
| P12/SO00/TxD0/TOOLTxD | Serial data output / UART TX / debug TX | Supports SPI output, UART transmit, and on-chip debug communication |
| P13/TxD2/SO20/SDAA0 | UART2 TX / SPI2 output / I²C data alias | Secondary UART transmit; also serves as CSI2 output and SDAA0 for I²C slave |
| P14/RxD2/SI20/SDA20 | UART2 RX / SPI2 input / I²C data alias | Secondary UART receive; also supports CSI2 input and SDA20 for I²C slave |
| P15/PCLBUZ1/SCK20/SCL20 | Buzzer/clock output / SPI2 clock / I²C clock | Dedicated programmable clock/buzzer output; also provides SPI2/I²C2 clock |
| P30/INTP3/SCK11/SCL11 | Interrupt input / SPI1 clock / I²C clock | External interrupt source with shared SPI1 and I²C1 clock functionality |
| P50/INTP1/SI11/SDA11 | Interrupt input / SPI1 input / I²C data | Configurable interrupt pin supporting SPI1 data input and I²C1 data line |
| P51/INTP2/SO11 | Interrupt input / SPI1 output | Interrupt-capable SPI1 output pin; no I²C function assigned per datasheet |
| RESET | Active-low reset input | Asynchronous reset pin accepting external pull-up; triggers POR/LVD reset sequence |
| REGC | Voltage regulator capacitor terminal | Must connect to VSS via 0.47–1 µF capacitor; stabilizes internal LDO for analog blocks |
| VDD / VSS | Power supply / ground | Dual power pins: VDD accepts 1.8–5.5 V; VSS is common analog/digital ground |
| X1 / X2 | Crystal oscillator terminals | Supports 1–20 MHz crystal or ceramic resonator for main system clock |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low-power operation | 63 μA/MHz active current enables multi-year battery life in intermittent-sensing applications |
| Data flash with BGO | 2 KB data flash supports background rewriting during program execution - critical for firmware-over-the-air updates |
| Hardware CRC engine | Dedicated CRC calculation unit accelerates checksum validation for secure boot and communication integrity |
| Multi-voltage I/O tolerance | I/O ports support 1.8 V, 2.5 V, and 3.3 V logic levels without level shifters - simplifies mixed-voltage system design |
| On-chip debug with flash shield | Integrated debug interface with flash shield window prevents unauthorized code readout during development and production |
| Temperature sensor & reference | On-die temperature sensor and 1.45 V internal reference enable self-calibrating sensor systems without external components |
Applications
| Smart Home Sensor Hub | Industrial Remote Monitor |
|---|---|
|
Use Scenario: Battery-powered wireless node aggregating temperature, humidity, and motion data for BLE/Wi-Fi gateway upload. IC Role / Device Role / Timing Role: Primary MCU managing sensor polling, ADC sampling, low-power sleep scheduling, and UART-to-BLE bridge timing. Use Value: 63 μA/MHz active current and SNOOZE mode reduce average power to <10 µA between 10-second sensor reads - extending CR2032 life beyond 3 years. |
Use Scenario: DIN-rail mounted environmental monitor logging data to SD card and transmitting via RS-485 Modbus RTU. IC Role / Device Role / Timing Role: Central controller handling UART0 (Modbus), TAU0 PWM for LED status indicators, and 8-channel ADC for analog sensor inputs. Use Value: Dual UART support (UART0 + UART2) enables simultaneous Modbus master/slave operation and local debug port without multiplexing. |
| White Goods Control Panel | Medical Wearable Interface |
|
Use Scenario: Front-panel controller for washing machine with touch keys, buzzer feedback, and motor control signals. IC Role / Device Role / Timing Role: Real-time UI processor scanning KR0–KR9 key returns, driving PCLBUZ0/PCLBUZ1 for audible alerts, and generating PWM for display backlight. Use Value: Integrated key interrupt (10 inputs) and programmable buzzer output eliminate external key scan IC and piezo driver - reducing BOM count by 3 components. |
Use Scenario: Low-power pulse oximeter module measuring SpO₂ and heart rate, transmitting via UART to host MCU. IC Role / Device Role / Timing Role: Signal acquisition MCU performing synchronized 10-bit ADC sampling of red/IR photodiodes and computing ratio-based saturation. Use Value: Internal 1.45 V reference and temperature sensor allow drift compensation without external precision references - improving clinical accuracy across 0–50°C ambient range. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microcontroller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| R5F102A7ASP#70 | Same package and pinout; reduced memory (8 KB code flash, 512 B RAM, 2 KB data flash) | Suitable for cost-sensitive designs with smaller firmware footprint and lower RAM requirements | Select when application firmware fits within 8 KB and does not require >512 B runtime heap/stack |
| R5F103AAASP#70 | Same 30-pin LSSOP package but no data flash; ±5.0% oscillator accuracy; no DMA or CRC | Targeted at simpler control tasks where background data storage or high-precision timing is unnecessary | Choose only if data flash BGO, hardware CRC, or DMA-assisted peripheral transfers are not required |
Compared with R5F102AAASP#70, R5F102A7ASP#70 offers identical peripheral integration at lower memory cost, while R5F103AAASP#70 sacrifices data flash, oscillator accuracy, and safety peripherals - making it viable only for basic timing-critical control without field-upgrade needs.
Availability
R5F102AAASP#70 is available at Aetrix Electronics and suitable for smart home sensor hubs, industrial remote monitors, and white goods control panels requiring stable component supply, long-term lifecycle assurance, and RoHS-compliant packaging.
Supply support for R5F102AAASP#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, 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 consumer and industrial control applications - emphasizing energy efficiency, integrated analog, and simplified development.
FAQ
What is the maximum operating frequency and accuracy of the on-chip oscillator in R5F102AAASP#70?
The R5F102AAASP#70 features a high-speed on-chip oscillator rated for 1–24 MHz operation with ±1.0% accuracy over –20°C to +85°C ambient temperature. This specification applies specifically to the R5F102 series; the R5F103 variant has ±5.0% accuracy. The oscillator supports dynamic switching between frequencies without external components, enabling adaptive power/performance tuning in the R5F102AAASP#70.
Does R5F102AAASP#70 support background data flash rewriting while executing code from main flash?
Yes, the R5F102AAASP#70 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 implementing non-disruptive firmware updates or parameter logging in live systems. The R5F102AAASP#70 implements this via dedicated flash control registers and interrupt flags confirmed in the RL78/G12 User's Manual.
How many UART interfaces does R5F102AAASP#70 provide, and are they pin-compatible with other RL78/G12 variants?
The R5F102AAASP#70 provides two independent UART interfaces: UART0 (on P11/P12) and UART2 (on P13/P14). These are physically distinct and do not share pins with UART1, which is absent in this variant. Pin compatibility is maintained across R5F102x 30-pin devices (e.g., R5F102A7ASP#70), but R5F103x variants omit UART2 entirely - meaning UART2-dependent firmware will not migrate without hardware or software revision on the R5F102AAASP#70.
What analog features are integrated into R5F102AAASP#70, and how are they calibrated?
The R5F102AAASP#70 integrates an 8/10-bit ADC with 8 input channels, internal 1.45 V reference voltage, and an on-die temperature sensor. Calibration is factory-trimmed: the 1.45 V reference is trimmed to ±1% accuracy, and the temperature sensor output is linearized with slope/offset coefficients stored in ROM. No user calibration is required for typical applications, and both features operate across the full –40°C to +85°C range specified for the R5F102AAASP#70.
Is the REGC pin mandatory for proper operation of R5F102AAASP#70, and what happens if it is left unconnected?
Yes, the REGC pin is mandatory for stable operation of the R5F102AAASP#70. It must be connected to VSS via a 0.47–1 µF ceramic capacitor to stabilize the internal voltage regulator supplying analog circuitry. Leaving REGC unconnected or improperly decoupled causes erratic ADC readings, unstable oscillator behavior, and potential reset failures - especially during transitions between low-power modes. This requirement is explicitly called out in the RL78/G12 datasheet for all 30-pin R5F102x devices including the R5F102AAASP#70.
R5F102AAASP#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:
- 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:
- External, Internal
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
R5F102AAASP#70 FAQ
1.How can I place an order for R5F102AAASP#70 through Aetrix?
Please submit a Request for Quotation (RFQ) for R5F102AAASP#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 R5F102AAASP#70 reliable?
The price and inventory of R5F102AAASP#70 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for R5F102AAASP#70 is usually 5 days.
3.What payment methods are accepted for R5F102AAASP#70?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for R5F102AAASP#70 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for R5F102AAASP#70?
R5F102AAASP#70 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your R5F102AAASP#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 R5F102AAASP#70?
For technical support, including R5F102AAASP#70 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your R5F102AAASP#70 requirements.
6.How does Aetrix verify that R5F102AAASP#70 is sourced from the original manufacturer or authorized distributors?
All R5F102AAASP#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 R5F102AAASP#70 meets industry standards.
7.What is the process for return or replacement of R5F102AAASP#70?
All R5F102AAASP#70 units undergo pre-shipment inspection (PSI). If there is an issue with R5F102AAASP#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 R5F102AAASP#70 part is unused and in its original packaging.
Return procedure for R5F102AAASP#70:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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