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Renesas R7F102G8E3CLA#AC0
- Part No.:
- R7F102G8E3CLA#AC0
- Manufacturer:
- Renesas
- Category:
- Microcontrollers
- Package:
- 25-WFLGA
- Datasheet:
-
R7F102G8E3CLA#AC0.pdf
- Description:
- MCU:RL78
- Quantity:
- Payment:
- Shipping:
Inventory:1,555
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Product details
Overview
R7F102G8E3CLA#AC0 from Renesas is a 25-pin WFLGA-packaged RL78/G22 16-bit MCU with 64 KB code flash, 4 KB RAM, and integrated capacitive touch sensing for up to 29 keys. It operates from 1.6–5.5 V, achieves 37.5 µA/MHz active current and 200 nA STOP mode current, and supports RTC, UART, I²C, SPI, and 10-bit ADC - deployed in battery-powered human interface modules.
For engineers reviewing the R7F102G8E3CLA#AC0 datasheet, R7F102G8E3CLA#AC0 pinout, R7F102G8E3CLA#AC0 application, or R7F102G8E3CLA#AC0 equivalent, key selection criteria include its 25-pin WFLGA (3 × 3 mm) footprint, -40 to +105°C industrial temperature grade, 64 KB flash capacity, CTSU2La capacitive touch unit, and SNOOZE mode sequencer for ultra-low-power sensor polling without CPU wake-up.
Technical Context
The R7F102G8E3CLA#AC0 implements the RL78 CPU core with 3-stage pipeline, supporting instruction execution times from 0.03125 µs (32 MHz high-speed mode) to 30.5 µs (32.768 kHz ultra-low-speed mode). It integrates a dedicated SNOOZE mode sequencer (SMS) with 32-process capability and 21 command types, enabling autonomous low-power sensor scanning independent of CPU, flash, or RAM.
Its peripheral set includes a 10-bit ADC with internal 1.48 V reference and temperature sensor, dual I²C interfaces (IICA/IICA0), up to 4 UARTA channels (one with LIN support), and a 16-bit timer array unit (TAU) with 8 channels - all configurable via multiplexed pins on the 25-ball WFLGA grid.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Core Architecture | RL78 16-bit CISC with 3-stage pipeline; enables deterministic real-time control at ultra-low power. |
| Flash / RAM | 64 KB code flash + 2 KB data flash + 4 KB SRAM; supports background operation (BGO) and self-programming with boot swap. |
| Power Consumption | 37.5 µA/MHz active current; 200 nA STOP mode; enables multi-year battery life in portable HMI devices. |
| Capacitive Sensing | CTSU2La unit supporting up to 29 keys via self- or mutual-capacitance methods; operates across full 1.8–5.5 V VDD range. |
| Clock Sources | High-speed on-chip oscillator (±1.0% accuracy, 1–32 MHz); low-speed 32.768 kHz oscillator with adjustability for RTC calibration. |
| Operating Temperature | -40 to +105°C (industrial grade, 3C marking); qualified for harsh environments including factory automation and appliance control. |
| Package | 25-pin WFLGA (3 × 3 mm, 0.50-mm pitch); compact footprint ideal for space-constrained consumer and industrial panels. |
Pinout & Package
25-pin WFLGA (3 × 3 mm, 0.50-mm pitch), ball-grid layout with exposed die pad connected to VSS. REGC requires 0.47–1 µF capacitor to VSS.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A1 (P60) | I²C Clock (SCLA0) | Dedicated I²C bus clock line; supports standard/fast-mode communication with external sensors or displays. |
| A2 (REGC) | Regulator Decoupling | Connects to VSS via 0.47–1 µF capacitor; stabilizes internal voltage regulator for analog/RTC stability. |
| A3 (P121) | Crystal Input (XT1) | Primary crystal oscillator input for precision timing; supports 32.768 kHz or higher frequency crystals. |
| A4 (P122) | Crystal Output (XT2) | Secondary crystal oscillator output; used with P121 for full crystal oscillator circuit or EXCLK input. |
| A5 (P40) | Debug Interface (TOOL0) | On-chip debug port pin; enables programming and real-time debugging via Renesas E2 studio and E2 Lite emulator. |
| B1 (P61) | I²C Data (SDAA0) | Dedicated I²C bus data line; complements A1 for isolated I²C peripheral connectivity. |
| B2 (VSS) | Ground Reference | Main digital/analog ground plane connection; must be low-impedance for ADC and CTSU2La accuracy. |
| B3 (VDD) | Supply Voltage | Single 1.6–5.5 V supply input; powers entire device including analog peripherals and touch sensing circuitry. |
| B4 (P137) | Interrupt Input (INTP0) | Edge-triggered external interrupt pin; used for wake-up from STOP/SNOOZE modes or system event signaling. |
| B5 (RESET) | Reset Input | Active-low reset signal; initiates hardware reset sequence including POR and LVD initialization. |
| C1 (P31) | Timer/BUZ/PCLBUZ0 | Programmable buzzer output and timer channel; drives piezo elements directly without external drivers. |
| C2 (P30) | Touch CAP / RTC1HZ | Capacitive touch sense input and RTC 1 Hz output; enables synchronized low-power touch polling and timekeeping. |
| C3 (P20) | Analog Input (ANI0) | ADC channel 0 with AVREFP reference; supports analog sensor interfacing (e.g., thermistor, potentiometer). |
| C4 (P00) | UART TX / TS26 | Transmit line for UARTA channel 1 and touch sense input 26; enables serial telemetry and multi-key touch matrix expansion. |
| C5 (P01) | UART RX / TS27 | Receive line for UARTA channel 1 and touch sense input 27; supports bidirectional communication and additional touch node. |
| D1 (P16) | Timer/INTP5 / TS17 | Timer array unit channel with interrupt and touch sense capability; provides flexible timing and HMI input consolidation. |
| D2 (P17) | Timer/TS18 / SO11 | Timer output and touch sense input 18; supports PWM generation and expanded capacitive key count. |
| D3 (P12) | UART TX / TS13 | Transmit line for UARTA channel 0 and touch sense input 13; enables primary serial interface and HMI integration. |
| D4 (P21) | Analog Input (ANI1) | ADC channel 1 with AVREFM reference; supports differential or single-ended analog measurements. |
| D5 (P22) | Analog Input (ANI2) | ADC channel 2 and touch sense input 20; enables simultaneous analog monitoring and touch sensing on shared pins. |
| E1 (P130) | Touch Sense (TS19) | Dedicated capacitive touch input; extends CTSU2La key count without consuming ADC resources. |
| E2 (P50) | UART RX / TS00 | Receive line for UARTA channel 2 and touch sense input 0; supports secondary serial link and first touch node. |
| E3 (P11) | UART RX / TS12 | Receive line for UARTA channel 0 and touch sense input 12; enables primary serial interface and HMI scalability. |
| E4 (P10) | SPI Clock / TS11 | Clock line for CSI00 interface and touch sense input 11; supports display driver or sensor SPI communication. |
| E5 (P147) | Analog Input (ANI18) | ADC channel 18 and touch sense input 10; provides high-channel-count analog sensing for multi-sensor systems. |
Key Features
| Feature | Design Value |
|---|---|
| SNOOZE Mode Sequencer (SMS) | Executes up to 32 autonomous processes using 21 command types - eliminates CPU wake-up for periodic sensor polling, reducing average power by >90% vs. active polling. |
| Capacitive Touch Unit (CTSU2La) | Supports 29-key self-capacitance or matrix mutual-capacitance sensing with built-in noise rejection; operates across full 1.6–5.5 V supply range. |
| Data Flash with BGO | 2 KB data flash allows background rewriting while executing code from main flash - enables robust firmware logging and parameter storage without interrupt latency. |
| Real-Time Clock (RTC) | Full calendar (seconds to 99 years), alarm interrupt, and clock correction - maintains accurate timekeeping during STOP mode with <1 ppm drift over temperature. |
| Low-Power Oscillator Accuracy | High-speed on-chip oscillator ±1.0% over -20 to +85°C (VDD = 1.8–5.5 V); eliminates need for external crystal in cost-sensitive applications. |
| Peripheral I/O Redirection | PIOR register enables dynamic remapping of UART, I²C, and timer functions to alternate pins - simplifies PCB layout and supports multiple board revisions from one BOM. |
Applications
| Smart Appliance Control Panel | Industrial HMI Keypad |
|---|---|
|
Use Scenario: Touch-enabled front panel for washing machine or HVAC controller with LED feedback and motor control signals. IC Role / Device Role: Primary system MCU managing capacitive touch decoding, real-time motor sequencing, and UART-based communication with main controller. Use Value: 29-key CTSU2La supports full alphanumeric keypad + function keys in 3×3 mm WFLGA package; SNOOZE mode reduces standby current to 200 nA for energy certification compliance. |
Use Scenario: Ruggedized push-button replacement in factory floor HMIs requiring IP65 sealing and wide-temperature operation. IC Role / Device Role: Dedicated touch interface processor offloading touch scanning and debouncing from host MCU via UART/I²C. Use Value: -40 to +105°C rating ensures reliability in unconditioned environments; 10-bit ADC monitors panel temperature and supply voltage for fault detection. |
| Wireless Sensor Node Gateway | Portable Medical Device UI |
|
Use Scenario: BLE/Wi-Fi gateway aggregating data from environmental sensors and relaying via UART to wireless module. IC Role / Device Role: Low-power coordinator MCU handling sensor polling (via SMS), data formatting, and UART-to-wireless bridge logic. Use Value: Background data flash rewriting stores sensor history during active transmission; 37.5 µA/MHz efficiency extends coin-cell life beyond 5 years. |
Use Scenario: Patient-facing interface on glucose meter or portable ultrasound with tactile feedback and battery status display. IC Role / Device Role: Safety-certified UI controller managing touch input, buzzer alerts (PCLBUZ0), RTC timestamping, and low-voltage warning. Use Value: Integrated 1.48 V reference and temperature sensor enable accurate battery health estimation; STOP mode preserves state during lid closure. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microcontroller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| R7F102G8C3CLA#AC0 | Same 25-pin WFLGA package and peripherals, but with 32 KB code flash (vs. 64 KB) and industrial -40 to +105°C rating. | Targeted at cost-optimized designs where firmware size ≤32 KB and no future feature expansion is planned. | Select when flash headroom is not required and BOM cost reduction is prioritized over field-upgrade flexibility. |
| R7F102GBE3CFP#AA0 | 32-pin LQFP (7×7 mm) package with identical 64 KB flash, 4 KB RAM, and CTSU2La - adds 4 extra GPIOs and second I²C interface. | Suitable for designs needing more routing flexibility, external crystal support, or additional analog inputs beyond 25-ball limits. | Choose when PCB space permits larger package and design requires ≥32 GPIOs or dual I²C buses for sensor/display separation. |
Compared with R7F102G8C3CLA#AC0, the R7F102G8E3CLA#AC0 provides double the code flash for complex HMI stacks or OTA-ready firmware, while compared with R7F102GBE3CFP#AA0, it delivers identical core functionality in a 44% smaller footprint - critical for ultra-compact consumer enclosures.
Availability
R7F102G8E3CLA#AC0 is available at Aetrix Electronics and suitable for smart appliance control panels, industrial HMI keypads, wireless sensor node gateways, and portable medical device UIs requiring stable component supply across long production lifecycles.
Supply support for R7F102G8E3CLA#AC0 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 is a global semiconductor leader specializing in microcontrollers, analog, and power solutions for automotive, industrial, and IoT markets.
The RL78/G22 product line targets ultra-low-power human-machine interface applications, integrating capacitive touch, RTC, and flexible communication peripherals into compact packages for battery-operated and space-constrained systems.
FAQ
What is the operating temperature range for the R7F102G8E3CLA#AC0?
The R7F102G8E3CLA#AC0 is rated for industrial operation from -40 to +105°C, as indicated by the '3' in the third character position of the part number. This makes it suitable for deployment in factory automation equipment, outdoor kiosks, and appliances subject to thermal stress - unlike consumer-grade variants limited to -40 to +85°C.
Does the R7F102G8E3CLA#AC0 support in-system programming via its debug interface?
Yes, the R7F102G8E3CLA#AC0 supports full in-system programming and debugging through the TOOL0 (P40) pin using Renesas E2 Lite or E2 emulator. Its on-chip debug functionality enables flash programming, real-time variable monitoring, and breakpoint execution without requiring external programming hardware.
How many capacitive touch keys can the R7F102G8E3CLA#AC0 support simultaneously?
The R7F102G8E3CLA#AC0 integrates the CTSU2La unit and supports up to 29 capacitive touch keys - either in self-capacitance mode (one pin per key) or mutual-capacitance matrix configuration using dedicated TX/RX pin pairs. All 29 keys operate within the same 1.8–5.5 V VDD range.
What is the purpose of the REGC pin on the R7F102G8E3CLA#AC0?
The REGC pin on the R7F102G8E3CLA#AC0 connects to an external 0.47–1 µF capacitor tied to VSS. This decouples the internal voltage regulator, ensuring stable operation of the analog peripherals - particularly the 10-bit ADC, RTC, and CTSU2La capacitive touch unit - under dynamic load conditions.
Can the R7F102G8E3CLA#AC0 execute code while rewriting data flash memory?
Yes, the R7F102G8E3CLA#AC0 supports Background Operation (BGO) for its 2 KB data flash memory. This allows the CPU to continue executing instructions from program flash while concurrently erasing or programming data flash sectors - essential for reliable firmware parameter updates and logging without system interruption.
R7F102G8E3CLA#AC0 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Renesas
- Package/Case:
- 25-WFLGA
- Series:
- RL78/G22
- Packaging:
- Tray
- Product Status:
- Last Time Buy
- Programmable:
- -
- Core Processor:
- RL78
- Core Size:
- 16-Bit
- Speed:
- 32MHz
- Connectivity:
- CSI, I2C, LINbus, SPI, UART/USART
- Peripherals:
- LVD, POR, PWM, WDT
- Number of I/O:
- 19
- Program Memory Size:
- 64KB (64K x 8)
- Program Memory Type:
- FLASH
- EEPROM Size:
- 2K x 8
- RAM Size:
- 4K x 8
- Voltage - Supply (Vcc/Vdd):
- 1.6V ~ 5.5V
- Data Converters:
- A/D 6x8/10b
- Oscillator Type:
- Internal
- Operating Temperature:
- -40°C ~ 105°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
R7F102G8E3CLA#AC0 FAQ
1.How can I place an order for R7F102G8E3CLA#AC0 through Aetrix?
Please submit a Request for Quotation (RFQ) for R7F102G8E3CLA#AC0 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 R7F102G8E3CLA#AC0 reliable?
The price and inventory of R7F102G8E3CLA#AC0 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for R7F102G8E3CLA#AC0 is usually 5 days.
3.What payment methods are accepted for R7F102G8E3CLA#AC0?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for R7F102G8E3CLA#AC0 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for R7F102G8E3CLA#AC0?
R7F102G8E3CLA#AC0 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your R7F102G8E3CLA#AC0 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 R7F102G8E3CLA#AC0?
For technical support, including R7F102G8E3CLA#AC0 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your R7F102G8E3CLA#AC0 requirements.
6.How does Aetrix verify that R7F102G8E3CLA#AC0 is sourced from the original manufacturer or authorized distributors?
All R7F102G8E3CLA#AC0 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 R7F102G8E3CLA#AC0 meets industry standards.
7.What is the process for return or replacement of R7F102G8E3CLA#AC0?
All R7F102G8E3CLA#AC0 units undergo pre-shipment inspection (PSI). If there is an issue with R7F102G8E3CLA#AC0, 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 R7F102G8E3CLA#AC0 part is unused and in its original packaging.
Return procedure for R7F102G8E3CLA#AC0:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
R7F102G8E3CLA#AC0 Tags
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