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Renesas R5F103A9ASP#X0
- Part No.:
- R5F103A9ASP#X0
- Manufacturer:
- Renesas
- Category:
- Microcontrollers
- Package:
- 30-LSSOP (0.240", 6.10mm Width)
- Datasheet:
-
R5F103A9ASP#X0.pdf
- Description:
- IC MCU 16BIT 12KB FLASH 30LSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:2,741
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Product details
Overview
R5F103A9ASP#X0 from Renesas Electronics is a 30-pin LSSOP packaged RL78/G12 16-bit microcontroller designed for low-power general-purpose embedded control. It features 8 KB code flash, 768 B RAM, 10-bit 8-channel ADC, 8-channel 16-bit timer (including PWM), UART/CSI serial interfaces, and operates from 1.8 V to 5.5 V across –40°C to +85°C ambient range - deployed in battery-powered sensor nodes and industrial HMI panels.
For engineers reviewing the R5F103A9ASP#X0 datasheet, R5F103A9ASP#X0 pinout, R5F103A9ASP#X0 application, or R5F103A9ASP#X0 equivalent, key selection criteria include its 30-pin LSSOP package, absence of data flash memory, 8-channel TAU timer with PWM capability, UART-only serial interface (no I²C or CSI beyond UART0), and consumer-grade temperature rating (–40°C to +85°C).
Technical Context
The R5F103A9ASP#X0 implements the RL78 CPU core with 3-stage pipeline CISC architecture, supporting minimum instruction execution time of 0.04167 µs at 24 MHz high-speed on-chip oscillator operation. Its clock system integrates selectable high-speed on-chip oscillator (1–24 MHz, ±5% accuracy over –40°C to +85°C) and external crystal input (X1/X2, up to 20 MHz), with dedicated low-speed 15 kHz on-chip oscillator for watchdog and interval timer.
Peripheral integration includes 26 GPIO pins (with N-ch open-drain support), programmable key interrupt (6 inputs), on-chip power-on-reset and voltage detector (12-level LVD), and 12-bit interval timer. Unlike R5F102 variants, it omits DMA, CRC, RAM/SFR guard, and data flash - confirming its role as a cost-optimized, entry-level RL78/G12 variant for deterministic real-time control without background data logging.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Core Architecture | RL78 16-bit CISC CPU with 3-stage pipeline, 1 MB address space |
| Flash / RAM | 8 KB code flash (1 KB block size), 768 B SRAM - sufficient for compact firmware with real-time ISR handling |
| Operating Voltage | 1.8 V to 5.5 V - enables direct interface with 1.8 V, 3.3 V, and 5 V peripherals without level shifters |
| ADC | 10-bit resolution, 8 input channels, internal 1.45 V reference - supports analog sensing in motor control and environmental monitoring |
| Timers | 8-channel 16-bit TAU (Timer Array Unit), 12-bit interval timer, 1-channel window watchdog - delivers precise PWM generation and safety-critical timeout protection |
| Serial Interfaces | 1 UART channel (RxD0/TxD0), no I²C or CSI - suitable for point-to-point host communication, not multi-device bus systems |
| Temperature Range | –40°C to +85°C (Consumer grade A-class) - qualified for indoor industrial controls and consumer electronics, not extended-temp environments |
Pinout & Package
Package: 30-pin plastic LSSOP (7.62 mm, 0.65 mm pitch), surface-mount, RoHS-compliant.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| P10/SCK00/SCL00 | Port 1 bit 0 / SPI clock / I²C clock | Multi-function pin; default SCK00 for master SPI, configurable as I²C clock only if peripheral I/O redirection enabled (not standard on R5F103) |
| P11/SI00/RxD0/SDA00 | Port 1 bit 1 / SPI input / UART receive / I²C data | Primary UART0 RX pin; supports SPI slave input or I²C data when PIOR configured - but R5F103A9 lacks simplified I²C hardware |
| P12/SO00/TxD0/TOOLTxD | Port 1 bit 2 / SPI output / UART transmit / debug TX | Dedicated UART0 TX and tool interface output; critical for firmware upload and runtime diagnostics |
| P13/TxD2/SO20/(TI04/TO04) | Port 1 bit 3 / UART2 TX / SPI2 output / timer I/O | Secondary UART TX (UART2) - confirmed functional per datasheet Table 1-1 and block diagram for 30-pin R5F103Ax |
| P14/RxD2/SI20/SDA20 | Port 1 bit 4 / UART2 RX / SPI2 input / I²C data | Secondary UART RX (UART2); supports full-duplex UART2 communication independent of UART0 |
| P20/ANI0/AVREFP | Analog input 0 / ADC positive reference | Primary analog input with dedicated AVREFP function - used for ratiometric ADC measurements with external sensor bridges |
| P21/ANI1/AVREFM | Analog input 1 / ADC negative reference | Paired with P20 to enable differential ADC mode or external reference biasing |
| RESET | Active-low reset input | Asynchronous reset pin; accepts external pull-up and debounced push-button; triggers POR/LVD-initiated reset sequences |
| VDD / VSS | Power supply / Ground | Single 1.8–5.5 V supply rail; requires local 0.1 µF ceramic decoupling per VDD pin per datasheet layout guidance |
| X1 / X2 | Crystal oscillator input / output | Supports external 1–20 MHz crystal for precision timing; required for applications needing <±100 ppm frequency stability |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low power HALT/STOP/SNOOZE modes | 63 µA/MHz active current; sub-µA STOP mode - extends battery life in intermittent-sensing applications |
| On-chip high-speed oscillator (1–24 MHz) | ±5% accuracy over –40°C to +85°C - eliminates external crystal for cost-sensitive designs where timing tolerance permits |
| 8-channel 16-bit Timer Array Unit (TAU) | Configurable as PWM, input capture, or interval timer - enables motor phase control and pulse-width modulation without external timers |
| 10-bit 8-channel ADC with internal reference | 1.45 V internal reference voltage - removes need for external precision reference in basic sensor signal conditioning |
| 26 GPIO with flexible configuration | N-ch open-drain, TTL input, and on-chip pull-up options - simplifies interfacing with switches, LEDs, and mixed-voltage logic |
Applications
| Smart Appliance Control Panel | Industrial Sensor Node |
|---|---|
Use Scenario: Touchless button interface and LED status feedback in washing machine control boards. IC Role / Device Role / Timing Role: Main system controller executing state machine, scanning key matrix via KR inputs, driving buzzer and segmented LED via PCLBUZ0/P15, and managing UART-based communication with main MCU. Use Value: Low active current (63 µA/MHz) and integrated 8-channel TAU reduce BOM count by eliminating external PWM drivers and timing ICs. | Use Scenario: Battery-powered temperature/humidity sensor transmitting data every 30 seconds via UART to gateway. IC Role / Device Role / Timing Role: Data acquisition controller sampling analog sensors via 8-channel ADC, formatting packets in RAM, and triggering UART transmission using TAU interval timer interrupts. Use Value: STOP mode current <0.5 µA enables >2-year battery life on CR2032; built-in LVD prevents brownout-induced data corruption during voltage sag. |
| Home Automation Relay Module | POS Peripheral Controller |
Use Scenario: DIN-rail mounted relay driver board switching 12 V DC loads based on RS-485 commands. IC Role / Device Role / Timing Role: Isolated UART interface processor receiving Modbus RTU frames, validating CRC, and asserting GPIO outputs to drive opto-relays. Use Value: 26 GPIO pins support 8 relay channels + status LEDs; 1.8–5.5 V operation allows direct use of 3.3 V isolated power rails without regulators. | Use Scenario: Barcode scanner companion controller managing trigger logic, LED illumination, and USB-to-UART bridge handshaking. IC Role / Device Role / Timing Role: Peripheral coordinator handling button press detection (INTP0–INTP5), driving buzzer (PCLBUZ0), and buffering UART data between scanner engine and host PC. Use Value: On-chip key interrupt function reduces CPU polling overhead; 8 KB flash accommodates dual-firmware update capability for field upgrades. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microcontroller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| R5F103AAASP#X0 | 16 KB code flash, 2 KB RAM, same 30-pin LSSOP package and peripheral set | Supports larger firmware images (e.g., BLE stack + application), higher RAM headroom for dynamic buffers | Select when firmware exceeds 8 KB or requires >768 B runtime heap |
| R5F102A9ASP#X0 | Includes 2 KB data flash, DMA controller, CRC unit, and ±1% oscillator accuracy (vs. ±5%) | Enables secure firmware updates, background data logging, and robust checksum validation in safety-critical firmware | Select when data retention, cryptographic integrity, or tighter timing stability is mandatory |
Compared with R5F103AAASP#X0, the R5F103A9ASP#X0 trades flash/RAM capacity for lower unit cost; versus R5F102A9ASP#X0, it sacrifices data flash, DMA, and oscillator precision to achieve reduced bill-of-materials and simpler qualification for non-safety applications.
Availability
R5F103A9ASP#X0 is available at Aetrix Electronics and suitable for smart appliance control panels, industrial sensor nodes, home automation relay modules, and POS peripheral controllers requiring stable component supply and long-term production continuity.
Supply support for R5F103A9ASP#X0 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 optimized for cost-sensitive, battery-operated, and general-purpose embedded control applications - emphasizing energy efficiency, integrated peripherals, and rapid development with scalable toolchains.
FAQ
What is the maximum operating frequency of the R5F103A9ASP#X0?
The R5F103A9ASP#X0 supports a maximum high-speed on-chip oscillator frequency of 24 MHz, delivering 31 DMIPS performance. When using an external crystal (X1), the maximum system clock is 20 MHz. The CPU executes instructions in as little as 0.04167 µs at 24 MHz, confirmed in the RL78/G12 datasheet Rev.2.20 Section 1.1.
Does the R5F103A9ASP#X0 include data flash memory?
No, the R5F103A9ASP#X0 does not include data flash memory. Per RL78/G12 datasheet Section 1.3.1 and memory table on Page 2, R5F103 products (including R5F103A9ASP#X0) omit the 2 KB data flash present in R5F102 variants. Firmware must use code flash sectors or external EEPROM for non-volatile parameter storage.
What serial communication interfaces are supported by the R5F103A9ASP#X0?
The R5F103A9ASP#X0 supports one UART channel (UART0 on P11/P12) and a second UART channel (UART2 on P13/P14), as confirmed in the 30-pin block diagram (Page 13) and peripheral summary (Page 15). It does not include hardware I²C, CSI, or simplified I²C - unlike R5F102Ax variants. UART2 enables simultaneous host communication and peripheral bridging.
What is the GPIO count and configuration capability of the R5F103A9ASP#X0?
The R5F103A9ASP#X0 provides 26 GPIO pins in its 30-pin LSSOP package. Each pin can be configured as CMOS I/O, N-ch open-drain (VDD-tolerant), TTL input, or with on-chip pull-up resistors. Up to 9 pins support N-ch open-drain operation, enabling direct interface with 5 V logic or LED driving without external components.
Is the R5F103A9ASP#X0 pin-compatible with other RL78/G12 30-pin variants?
Yes, the R5F103A9ASP#X0 shares identical pinout and package (30-pin LSSOP) with all RL78/G12 30-pin variants including R5F103AAASP#X0, R5F103A8ASP#X0, and R5F103A7ASP#X0. Pin functions are consistent across this family; differences lie only in memory size, oscillator accuracy, and peripheral enablement - verified in datasheet Figures 1-1 and 1.4.3.
R5F103A9ASP#X0 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:
- Obsolete
- Programmable:
- Not Verified
- Core Processor:
- RL78
- Core Size:
- 16-Bit
- Speed:
- 24MHz
- Connectivity:
- CSI, I2C, UART/USART
- Peripherals:
- LVD, POR, PWM, WDT
- Number of I/O:
- 23
- Program Memory Size:
- 12KB (12K x 8)
- Program Memory Type:
- FLASH
- EEPROM Size:
- -
- RAM Size:
- 1K 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:
R5F103A9ASP#X0 FAQ
1.How can I place an order for R5F103A9ASP#X0 through Aetrix?
Please submit a Request for Quotation (RFQ) for R5F103A9ASP#X0 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 R5F103A9ASP#X0 reliable?
The price and inventory of R5F103A9ASP#X0 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for R5F103A9ASP#X0 is usually 5 days.
3.What payment methods are accepted for R5F103A9ASP#X0?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for R5F103A9ASP#X0 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for R5F103A9ASP#X0?
R5F103A9ASP#X0 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your R5F103A9ASP#X0 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 R5F103A9ASP#X0?
For technical support, including R5F103A9ASP#X0 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your R5F103A9ASP#X0 requirements.
6.How does Aetrix verify that R5F103A9ASP#X0 is sourced from the original manufacturer or authorized distributors?
All R5F103A9ASP#X0 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 R5F103A9ASP#X0 meets industry standards.
7.What is the process for return or replacement of R5F103A9ASP#X0?
All R5F103A9ASP#X0 units undergo pre-shipment inspection (PSI). If there is an issue with R5F103A9ASP#X0, 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 R5F103A9ASP#X0 part is unused and in its original packaging.
Return procedure for R5F103A9ASP#X0:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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