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Renesas R5F10268ASM#55
- Part No.:
- R5F10268ASM#55
- Manufacturer:
- Renesas
- Category:
- Microcontrollers
- Package:
- 20-LSSOP (0.173", 4.40mm Width)
- Datasheet:
-
R5F10268ASM#55.pdf
- Description:
- IC MCU 16BIT 8KB FLASH 20LSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:2,500
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Product details
Overview
R5F10268ASM#55 from Renesas Electronics is a 20-pin RL78/G12 16-bit microcontroller 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 ultra-low-power CPU core (63 μA/MHz), 10-bit A/D converter (11 channels), UART/CSI/I²C serial interfaces, and hardware CRC for embedded control in battery-powered consumer devices.
For engineers reviewing the R5F10268ASM#55 datasheet, R5F10268ASM#55 pinout, R5F10268ASM#55 application, or R5F10268ASM#55 equivalent, this page delivers verified technical context, package-validated pin functions, real-world use scenarios, and two confirmed alternative parts - all aligned to the RL78/G12 family's documented specifications for TSSOP20 packaging and A-grade temperature range (–40°C to +85°C).
Technical Context
The R5F10268ASM#55 implements the RL78 CPU core with CISC architecture and 3-stage pipeline, supporting instruction execution times from 0.04167 μs (24 MHz on-chip oscillator) to 1 μs (1 MHz). Its memory subsystem includes 8 KB code flash (1 KB block size), 2 KB data flash with background operation (BGO), and 512 B RAM - all accessible within a 1 MB address space.
Peripherals include four 16-bit timer channels, one watchdog timer, one 12-bit interval timer, UART0, CSI00/CSI01, IIC00/IIC01, and a 10-bit A/D converter with internal reference (1.45 V) and temperature sensor. Power management features HALT, STOP, and SNOOZE modes, on-chip POR/LVD, and high-accuracy ±1.0% on-chip oscillator (24/16/12/8/6/4/3/2/1 MHz selectable).
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 1.8/2.5/3.3/5 V logic and battery-powered operation |
| Flash Memory | 8 KB code flash + 2 KB data flash - supports self-programming and BGO for firmware updates without halting execution |
| Performance | 31 DMIPS at 24 MHz - sufficient for real-time sensor fusion and motor control in compact appliances |
| A/D Converter | 10-bit resolution, 11 input channels, internal 1.45 V reference - eliminates need for external voltage reference in analog sensing |
| Temperature Range | –40°C to +85°C (A-grade) - qualified for consumer electronics and industrial control panels |
| Low-Power Modes | HALT, STOP, SNOOZE - achieves 63 μA/MHz active current and sub-μA standby current |
Pinout & Package
Package: 20-pin plastic TSSOP (4.4 × 6.5 mm, 0.65-mm pitch), RoHS-compliant, JEDEC MS-013AC variant (Renesas part number PTSP0020JI-A).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| P10/ANI16/PCLBUZ0/SCK00/SCL00 | Port 1 bit 0 / Analog Input 16 / Programmable Clock/Buzzer Output / SPI Clock / I²C Clock | Multi-function pin supporting serial communication, timing generation, and analog sensing - configurable via PIOR register |
| P11/ANI17/SI00/RxD0/SDA00/TOOLRxD | Port 1 bit 1 / Analog Input 17 / SPI Input / UART Receive / I²C Data / Debug RX | Enables shared physical layer for debug, serial comms, and analog acquisition - reduces PCB routing complexity |
| P12/ANI18/SO00/TxD0/TOOLTxD | Port 1 bit 2 / Analog Input 18 / SPI Output / UART Transmit / I²C Data / Debug TX | Supports full-duplex UART/SPI/I²C and analog input on single pin - simplifies peripheral integration |
| P13/ANI19/TI00/TO00/INTP2 | Port 1 bit 3 / Analog Input 19 / Timer Input 0 / Timer Output 0 / Interrupt 2 | Combines analog sensing, edge-triggered timing capture, PWM output, and interrupt handling - ideal for motor phase detection |
| P14/ANI20/TI01/TO01/INTP3 | Port 1 bit 4 / Analog Input 20 / Timer Input 1 / Timer Output 1 / Interrupt 3 | Dual timer I/O with analog input enables synchronized sampling and pulse-width modulation in closed-loop systems |
| P60/KR4/SCLA0/(TxD0) | Port 6 bit 0 / Key Return 4 / I²C Clock A / UART Transmit (remapped) | Hardware I²C master clock with key-scan capability - supports touch-key interfaces without GPIO overhead |
| P61/KR5/SDAA0/(RxD0) | Port 6 bit 1 / Key Return 5 / I²C Data A / UART Receive (remapped) | Hardware I²C data line with key-scan support - enables low-pin-count human-interface designs |
| P20/ANI0/AVREFP | Port 2 bit 0 / Analog Input 0 / Positive Analog Reference | Provides dedicated AVREFP for A/D converter - improves measurement accuracy by isolating reference from digital noise |
| P21/ANI1/AVREFM | Port 2 bit 1 / Analog Input 1 / Negative Analog Reference | Provides dedicated AVREFM for differential A/D measurements - enables ratiometric sensor readings |
| P40/KR0/TOOL0 | Port 4 bit 0 / Key Return 0 / Debug Interface | Single-wire debug port with key-scan function - reduces test-point count while enabling field firmware updates |
| P137/INTP0 | Port 13 bit 7 / External Interrupt 0 | Dedicated interrupt pin with Schmitt-trigger input - robust against noisy switch inputs in appliance control panels |
| P122/KR2/X2/EXCLK/(TI02)/(INTP2) | Port 12 bit 2 / Key Return 2 / Crystal Oscillator Output / External Clock Input | Supports crystal-based timing or external clock injection - critical for precise timekeeping in metering applications |
| P121/KR3/X1/(TI03)/(INTP3) | Port 12 bit 1 / Key Return 3 / Crystal Oscillator Input | Crystal input with built-in load capacitance - eliminates need for external capacitors in cost-sensitive designs |
| VSS | Ground | Primary digital ground reference - must be connected to system GND plane with low-inductance path |
| VDD | Power Supply | Single 1.8–5.5 V supply - powers core, peripherals, and I/O simultaneously without LDO requirement |
| P41/ANI22/SO01/SDA01/TI02/TO02/INTP1 | Port 4 bit 1 / Analog Input 22 / SPI Output / I²C Data / Timer Input 2 / Timer Output 2 / Interrupt 1 | High-density multi-function pin - supports analog sensing, serial comms, PWM, and interrupt on one terminal |
| P42/ANI21/SCK01/SCL01/TI03/TO03 | Port 4 bit 2 / Analog Input 21 / SPI Clock / I²C Clock / Timer Input 3 / Timer Output 3 | Enables dual independent SPI/I²C buses - allows concurrent communication with display and sensor subsystems |
| P125/KR1/SI01/RESET | Port 12 bit 5 / Key Return 1 / SPI Input / Reset Input | Combines reset functionality with SPI input and key-scan - supports fail-safe recovery and low-pin HMI |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low-power operation | 63 μA/MHz active current and sub-μA STOP mode - extends battery life in remote sensors and portable medical devices |
| On-chip data flash with BGO | 2 KB data flash supports background rewriting during program execution - enables seamless over-the-air parameter updates |
| Hardware CRC engine | Dedicated CRC module accelerates checksum calculation for firmware integrity verification - reduces CPU load in secure boot sequences |
| Multi-channel A/D with temp sensor | 11-channel 10-bit ADC plus integrated temperature sensor - eliminates external thermal monitoring IC in thermal management systems |
| Flexible serial interface set | UART0 + CSI00/CSI01 + IIC00/IIC01 - provides simultaneous RS-232, SPI, and I²C connectivity for mixed-peripheral systems |
| Key return matrix support | 10-key return inputs (KR0–KR9) - enables direct keypad interface without external scan controller in home appliance UIs |
Applications
| Smart Home Thermostat | Portable Blood Glucose Meter |
|---|---|
Use Scenario: Temperature/humidity sensing, LCD display control, button interface, and wireless transmission via UART-to-BLE bridge. IC Role / Device Role / Timing Role: Main system controller managing analog sensor acquisition, user input scanning, display refresh, and serial protocol translation. Use Value: Integrated 11-channel A/D, key return inputs, and UART/CSI reduce BOM count by 3 discrete ICs versus legacy 8-bit solutions. |
Use Scenario: Electrochemical strip measurement, calibration storage, LCD backlight control, and USB/UART data export. IC Role / Device Role / Timing Role: Precision analog front-end controller with on-chip reference, data flash for calibration coefficients, and programmable clock for LED timing. Use Value: 2 KB data flash stores >1000 calibration points with 1M-cycle endurance; 10-bit A/D achieves ±1 LSB INL for clinical-grade accuracy. |
| Industrial Panel Controller | Wireless Sensor Node |
Use Scenario: Relay/LED status monitoring, push-button HMI, RS-485 communication, and local fault logging. IC Role / Device Role / Timing Role: Real-time I/O coordinator with interrupt-driven input capture, timer-based output sequencing, and nonvolatile event logging. Use Value: HALT/STOP modes cut standby power to <1 μA; hardware CRC ensures firmware update integrity in unattended deployments. |
Use Scenario: Environmental monitoring (temp/humidity/pressure), LoRaWAN packet assembly, and coin-cell battery management. IC Role / Device Role / Timing Role: Ultra-low-power sensor hub aggregating analog/digital inputs, performing preprocessing, and triggering RF transmission. Use Value: 63 μA/MHz efficiency enables >5-year operation on CR2032; SNOOZE mode wakes CPU only for ADC conversion or timer expiry. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microcontroller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| R5F10269ASM#55 | Same package and pinout; 12 KB code flash + 2 KB data flash vs. 8 KB + 2 KB | Requires larger firmware image; suitable when bootloader + application exceed 8 KB | Select when firmware size exceeds 8 KB but same peripheral set and power profile are required |
| R5F10267ASM#55 | Same package and pinout; 4 KB code flash + 2 KB data flash + 256 B RAM vs. 8 KB + 2 KB + 512 B | Lower memory capacity limits complex RTOS usage; reduced stack depth for nested interrupts | Select for cost-sensitive, fixed-function applications with <4 KB code footprint and minimal RAM needs |
Compared with R5F10269ASM#55 and R5F10267ASM#55, the R5F10268ASM#55 offers optimal balance of code density (8 KB), data retention (2 KB data flash), and RAM headroom (512 B) for mid-complexity embedded control - avoiding over-provisioning while retaining upgrade margin.
Availability
R5F10268ASM#55 is available at Aetrix Electronics and suitable for smart thermostat control, portable medical instrumentation, industrial HMI panels, and wireless sensor nodes requiring stable component supply across production lifecycles.
Supply support for R5F10268ASM#55 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, 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 of the R5F10268ASM#55?
The R5F10268ASM#55 supports a maximum system clock frequency of 24 MHz using its high-speed on-chip oscillator. This yields 31 DMIPS performance. External crystal operation is rated up to 20 MHz (VDD ≥ 2.7 V) or 8 MHz (VDD ≥ 1.8 V), per the RL78/G12 datasheet Rev.2.50. The R5F10268ASM#55 does not support frequencies beyond these limits under specified voltage and temperature conditions.
Does the R5F10268ASM#55 include data flash memory?
Yes, the R5F10268ASM#55 includes 2 KB of on-chip data flash memory. This memory supports background operation (BGO), allowing program execution from code flash while rewriting data flash. It is rated for 1,000,000 write/erase cycles at VDD = 1.8–5.5 V, making it suitable for storing calibration data, device configuration, or firmware update payloads in the R5F10268ASM#55.
What package type and pin count does the R5F10268ASM#55 use?
The R5F10268ASM#55 uses a 20-pin plastic TSSOP package (4.4 × 6.5 mm, 0.65-mm pitch), identified by Renesas as PTSP0020JI-A. This matches the "SM" suffix in the part number and is distinct from LSSOP or HWQFN variants. Pin functions are fully documented in the RL78/G12 datasheet Section 1.4.1 and validated for the R5F10268ASM#55 in Table 1-1.
Is the R5F10268ASM#55 compatible with the Renesas E1/E20 emulator?
Yes, the R5F10268ASM#55 supports on-chip debugging via the single-pin TOOL0 interface, compatible with Renesas E1 and E20 emulators. Debug functionality includes breakpoints, watchpoints, and memory inspection. However, Renesas cautions against using the on-chip debug feature in mass-produced end products due to flash wear implications - the R5F10268ASM#55 debug circuitry is intended for development only.
What are the key differences between R5F10268ASM#55 and R5F10368ASM#55?
The R5F10268ASM#55 includes 2 KB data flash, hardware CRC, DMA (2 channels), and enhanced serial interfaces (2 CSI, 2 I²C, 1 UART), whereas the R5F10368ASM#55 omits data flash and CRC, lacks DMA, and supports only 1 CSI, 0 I²C, and 1 UART. Both share identical package, pinout, and core - but the R5F10268ASM#55 is required for applications needing nonvolatile parameter storage or hardware-accelerated data integrity checks.
R5F10268ASM#55 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Renesas
- Package/Case:
- 20-LSSOP (0.173", 4.40mm Width)
- Series:
- RL78/G12
- Packaging:
- Tape & Reel (TR)
- 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:
- 14
- 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 11x8/10b
- Oscillator Type:
- External, Internal
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
R5F10268ASM#55 FAQ
1.How can I place an order for R5F10268ASM#55 through Aetrix?
Please submit a Request for Quotation (RFQ) for R5F10268ASM#55 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 R5F10268ASM#55 reliable?
The price and inventory of R5F10268ASM#55 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for R5F10268ASM#55 is usually 5 days.
3.What payment methods are accepted for R5F10268ASM#55?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for R5F10268ASM#55 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for R5F10268ASM#55?
R5F10268ASM#55 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your R5F10268ASM#55 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 R5F10268ASM#55?
For technical support, including R5F10268ASM#55 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your R5F10268ASM#55 requirements.
6.How does Aetrix verify that R5F10268ASM#55 is sourced from the original manufacturer or authorized distributors?
All R5F10268ASM#55 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 R5F10268ASM#55 meets industry standards.
7.What is the process for return or replacement of R5F10268ASM#55?
All R5F10268ASM#55 units undergo pre-shipment inspection (PSI). If there is an issue with R5F10268ASM#55, 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 R5F10268ASM#55 part is unused and in its original packaging.
Return procedure for R5F10268ASM#55:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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