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Renesas R5F10266ASM#35
- Part No.:
- R5F10266ASM#35
- Manufacturer:
- Renesas
- Category:
- Microcontrollers
- Package:
- 20-LSSOP (0.173", 4.40mm Width)
- Datasheet:
-
R5F10266ASM#35.pdf
- Description:
- IC MCU 16BIT 2KB FLASH 20LSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:1,925
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Product details
Overview
R5F10266ASM#35 from Renesas Electronics is a 20-pin RL78/G12 16-bit microcontroller with 2 KB code flash, 2 KB data flash, and 256 B RAM, operating at 1.8–5.5 V and delivering 31 DMIPS at 24 MHz. It integrates an ultra-low-power CPU core (63 μA/MHz), 10-bit 11-channel ADC, UART/CSI/I²C serial interfaces, 4-channel 16-bit TAU timer, and on-chip debug - deployed in battery-powered sensor nodes and industrial control panels.
For engineers reviewing the R5F10266ASM#35 datasheet, R5F10266ASM#35 pinout, R5F10266ASM#35 application, or R5F10266ASM#35 equivalent, key selection criteria include its TSSOP20 package, consumer-grade temperature range (−40°C to +85°C), absence of self-programming support, 2-channel DMA, and CRC hardware acceleration - all confirmed for this exact variant.
Technical Context
The R5F10266ASM#35 implements the RL78 CISC CPU core with 3-stage pipeline and supports dual-clock operation: high-speed on-chip oscillator (1–24 MHz, ±1.0% accuracy at −20°C to +85°C) and external crystal (1–20 MHz). Its peripheral set includes SAU0 with two CSI channels, one UART channel, two simplified I²C channels, and a 12-bit interval timer.
Power management features HALT, STOP, and SNOOZE modes; reset functions include POR, LVD (12 selectable thresholds), and watchdog timer. The device uses dedicated low-speed on-chip oscillator (15 kHz) for watchdog operation and supports key interrupt on six pins (KR0–KR5).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Core Architecture | RL78 16-bit CISC with 3-stage pipeline, 1 MB address space |
| Operating Voltage | 1.8 V to 5.5 V - enables direct interface with 1.8/2.5/3.3 V logic and battery-backed operation |
| Flash Memory | 2 KB code flash + 2 KB data flash - supports background operation (BGO) for data rewriting during program execution |
| RAM Size | 256 B - sufficient for basic real-time control stacks; insufficient for full data flash library execution per Note 2 |
| ADC Resolution | 10-bit, 11-channel - includes internal 1.45 V reference and temperature sensor for embedded sensing |
| Timer Resources | 4-channel 16-bit TAU (PWM-capable), 1-channel 12-bit interval timer, 1-window watchdog timer |
| Serial Interfaces | 1 UART, 2 CSI (SPI-like), 2 simplified I²C - no standard I²C master/slave; all channels share SAU0 module |
| Package & Pin Count | TSSOP20 (4.4 × 6.5 mm, 0.65 mm pitch) - surface-mount compatible with standard reflow profiles |
Pinout & Package
Package: 20-pin plastic TSSOP (PTSP0020JI-A), 4.4 × 6.5 mm, 0.65-mm pitch, exposed pad not present.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| P10/ANI16/PCLBUZ0/SCK00/SCL00 | Port 1 bit 0 / Analog Input 16 / Programmable Clock Output / SPI Clock / I²C Clock | Multi-function pin supporting buzzer tone generation, synchronous serial clocking, or analog sensing |
| P11/ANI17/SI00/RxD0/SDA00/TOOLRxD | Port 1 bit 1 / Analog Input 17 / SPI Data In / UART RX / I²C Data / Debug RX | Shared serial input path enabling flexible peripheral assignment via PIOR register |
| P12/ANI18/SO00/TxD0/TOOLTxD | Port 1 bit 2 / Analog Input 18 / SPI Data Out / UART TX / Debug TX | Combines UART transmit, SPI output, and analog input - requires functional mode selection |
| P13/ANI19/TI00/TO00/INTP2 | Port 1 bit 3 / Analog Input 19 / Timer Input 0 / Timer Output 0 / Interrupt 2 | Supports edge-triggered capture, PWM output, or external interrupt - configurable per application need |
| P14/ANI20/TI01/TO01/INTP3 | Port 1 bit 4 / Analog Input 20 / Timer Input 1 / Timer Output 1 / Interrupt 3 | Dual timer I/O capability enables quadrature decoding or dual-edge timing measurement |
| P20/ANI0/AVREFP | Port 2 bit 0 / Analog Input 0 / Positive Analog Reference | Serves as primary A/D reference voltage source or general-purpose analog input |
| P21/ANI1/AVREFM | Port 2 bit 1 / Analog Input 1 / Negative Analog Reference | Provides differential reference pair with P20 for ratiometric or precision analog measurements |
| P22/ANI2 | Port 2 bit 2 / Analog Input 2 | Dedicated analog input without reference function - used for auxiliary sensor channels |
| P23/ANI3 | Port 2 bit 3 / Analog Input 3 | Fourth dedicated analog input; supports temperature sensor readout when enabled |
| P40/KR0/TOOL0 | Port 4 bit 0 / Key Return 0 / Debug Interface | Enables low-power key wake-up and serves as bidirectional debug communication line |
| P41/ANI22/SO01/SDA01/TI02/TO02/INTP1 | Port 4 bit 1 / Analog Input 22 / SPI Output / I²C Data / Timer I/O / Interrupt 1 | Highly multiplexed pin supporting serial comms, analog sensing, and timer-based event handling |
| P42/ANI21/SCK01/SCL01/TI03/TO03 | Port 4 bit 2 / Analog Input 21 / SPI Clock / I²C Clock / Timer I/O | Second serial clock domain plus timer I/O - enables dual independent synchronous peripherals |
| P60/KR4/SCLA0/(TxD0) | Port 6 bit 0 / Key Return 4 / I²C Clock / UART TX (remapped) | N-ch open-drain I/O with 6 V tolerance - suitable for level-shifting I²C bus or driving external logic |
| P61/KR5/SDAA0/(RxD0) | Port 6 bit 1 / Key Return 5 / I²C Data / UART RX (remapped) | Complements P60 for I²C bus; supports remapped UART I/O for routing flexibility |
| P121/KR3/X1/(TI03)/(INTP3) | Port 12 bit 1 / Key Return 3 / Crystal Input / Timer Input / Interrupt | Primary crystal oscillator input; also usable as timer input or interrupt source when X1 disabled |
| P122/KR2/X2/EXCLK/(TI02)/(INTP2) | Port 12 bit 2 / Key Return 2 / Crystal Output / External Clock / Timer Input / Interrupt | Crystal output or external clock input; doubles as timer input or interrupt trigger |
| P125/KR1/SI01/RESET | Port 12 bit 5 / Key Return 1 / SPI Input / Reset Input | Active-low reset pin with internal pull-up; also functions as SPI data input when reset disabled |
| VDD | Power Supply | Single 1.8–5.5 V supply - eliminates need for external regulators in many low-voltage designs |
| VSS | Ground | Reference ground for analog and digital domains - must be connected with low-impedance path |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low power consumption | 63 μA/MHz active current enables multi-year battery life in intermittent-sensing applications |
| Hardware CRC accelerator | Reduces firmware overhead for checksum validation in firmware updates and secure boot sequences |
| On-chip data flash with BGO | Allows real-time logging or parameter storage without halting application execution |
| RAM guard and SFR guard | Prevents accidental overwrites of critical memory regions - enhances reliability in safety-critical firmware |
| Multi-voltage I/O interface | Supports direct connection to 1.8 V, 2.5 V, and 3.3 V peripherals without external level shifters |
| Key interrupt with KR0–KR5 | Enables wake-from-STOP on up to six mechanical or capacitive keys - ideal for remote controls and HMI panels |
Applications
| Smart Home Sensor Node | Industrial Panel Controller |
|---|---|
Use Scenario: Battery-powered temperature/humidity sensor transmitting data via UART to gateway every 5 minutes. IC Role / Device Role / Timing Role: Main system controller managing ADC sampling, low-power sleep scheduling, and UART burst transmission. Use Value: 63 μA/MHz active current and STOP mode reduce average power to <10 μA, extending CR2032 battery life beyond 3 years. | Use Scenario: Front-panel interface for HVAC system with push buttons, LED indicators, and RS-485 communication. IC Role / Device Role / Timing Role: Real-time HMI processor handling key scan, LED PWM dimming, and protocol translation between local UI and fieldbus. Use Value: Integrated 4-channel TAU timer provides independent PWM outputs for 4 LEDs while UART handles Modbus RTU framing. |
| Medical Wearable Monitor | Energy Meter Subsystem |
Use Scenario: Portable pulse oximeter using analog front-end and buzzer feedback for saturation alerts. IC Role / Device Role / Timing Role: Signal acquisition controller reading photodiode ADC channels and driving audible alert via PCLBUZ0. Use Value: On-chip 1.45 V reference and temperature sensor enable calibrated SpO₂ calculation without external components. | Use Scenario: Tamper-detection module monitoring enclosure switch status and logging events to data flash. IC Role / Device Role / Timing Role: Secure event logger capturing switch transitions and timestamps using CRC-protected flash writes. Use Value: Hardware CRC and 2 KB data flash with 1M rewrite cycles ensure reliable, long-term tamper audit trail storage. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microcontroller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| R5F10267ASM#35 | 512 B RAM, same 2 KB code/data flash, identical peripherals and pinout | Supports full data flash library execution; suitable for applications requiring runtime parameter storage | Select when firmware requires >256 B stack space for data flash operations |
| R5F10366ASM#35 | No data flash, no DMA, no CRC, reduced oscillator accuracy (±5%), same 2 KB code flash and 20-pin TSSOP | Lacks background data logging and hardware checksum; lower cost for basic control-only tasks | Select for cost-sensitive, non-data-logging applications where RAM usage is minimal |
Compared with R5F10267ASM#35, the R5F10266ASM#35 trades RAM headroom for lower BOM cost in simple sensor nodes; versus R5F10366ASM#35, it adds data flash durability and CRC security at modest price premium - making it optimal for field-deployed devices needing infrequent but reliable configuration updates.
Availability
R5F10266ASM#35 is available at Aetrix Electronics and suitable for smart home sensor nodes, industrial HMI panels, medical wearables, and energy meter subsystems requiring stable component supply across production lifecycles.
Supply support for R5F10266ASM#35 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 specializing in microcontrollers, analog, power, and SoC solutions for automotive, industrial, and IoT markets.
The RL78/G12 product line delivers true low-power 16-bit MCUs optimized for cost-sensitive, battery-operated, and industrial control applications - balancing performance, integration, and energy efficiency.
FAQ
What is the maximum operating frequency of the R5F10266ASM#35?
The R5F10266ASM#35 supports a maximum system clock frequency of 24 MHz using its high-speed on-chip oscillator. When using an external crystal, the maximum is 20 MHz. At 24 MHz, it achieves 31 DMIPS performance. The minimum instruction execution time is 0.04167 µs under these conditions, confirmed in the RL78/G12 datasheet Rev.2.50.
Does the R5F10266ASM#35 support self-programming of its flash memory?
No, the R5F10266ASM#35 does not support self-programming of code flash memory. This limitation is explicitly documented in Note 2 on page 2 of the RL78/G12 datasheet (R01DS0193EJ0250), which states "The self-programming function cannot be used for R5F10266 and R5F10366." Users must rely on external programming tools for firmware updates.
What is the operating temperature range for the R5F10266ASM#35?
The R5F10266ASM#35 is rated for TA = −40°C to +85°C and belongs to the "A" (consumer applications) field-of-use category. This is confirmed by its part number suffix "ASM#35", where "A" denotes consumer-grade temperature specification per Figure 1-1 in the RL78/G12 datasheet.
How many analog input channels does the R5F10266ASM#35 have?
The R5F10266ASM#35 provides 11 analog input channels: ANI0 through ANI3 and ANI16 through ANI22. This is specified in Section 1.1 Features and confirmed in the 20-pin block diagram (page 11) and Table 1-1 pin configuration. All channels operate across the full 1.8–5.5 V supply range with 10-bit resolution.
Is the R5F10266ASM#35 pin-compatible with other RL78/G12 20-pin variants?
Yes, the R5F10266ASM#35 shares identical pinout and package (TSSOP20) with all other R5F102xxASM and R5F103xxASM variants, including R5F10267ASM#35 and R5F10366ASM#35. Pin functions are consistent across the family, though peripheral availability (e.g., data flash, DMA) varies - verified in Section 1.4.1 and Table 1-1 of the datasheet.
R5F10266ASM#35 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Renesas
- Package/Case:
- 20-LSSOP (0.173", 4.40mm Width)
- Series:
- RL78/G12
- Packaging:
- Tray
- Product Status:
- Last Time Buy
- 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:
- 14
- Program Memory Size:
- 2KB (2K x 8)
- Program Memory Type:
- FLASH
- EEPROM Size:
- 2K x 8
- RAM Size:
- 256 x 8
- Voltage - Supply (Vcc/Vdd):
- 1.8V ~ 5.5V
- Data Converters:
- A/D 11x8/10b
- Oscillator Type:
- External, Internal
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
R5F10266ASM#35 FAQ
1.How can I place an order for R5F10266ASM#35 through Aetrix?
Please submit a Request for Quotation (RFQ) for R5F10266ASM#35 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 R5F10266ASM#35 reliable?
The price and inventory of R5F10266ASM#35 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for R5F10266ASM#35 is usually 5 days.
3.What payment methods are accepted for R5F10266ASM#35?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for R5F10266ASM#35 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for R5F10266ASM#35?
R5F10266ASM#35 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your R5F10266ASM#35 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 R5F10266ASM#35?
For technical support, including R5F10266ASM#35 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your R5F10266ASM#35 requirements.
6.How does Aetrix verify that R5F10266ASM#35 is sourced from the original manufacturer or authorized distributors?
All R5F10266ASM#35 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 R5F10266ASM#35 meets industry standards.
7.What is the process for return or replacement of R5F10266ASM#35?
All R5F10266ASM#35 units undergo pre-shipment inspection (PSI). If there is an issue with R5F10266ASM#35, 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 R5F10266ASM#35 part is unused and in its original packaging.
Return procedure for R5F10266ASM#35:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
R5F10266ASM#35 Tags
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