ATSAMD21G18A-AU Microcontroller MCU
High-performance 32-bit microcontroller featuring a 48MHz ARM Cortex-M0+ processor with 256KB Flash and 32KB SRAM memory. This low-power MCU offers comprehensive connectivity options and advanced peripherals for industrial applications.
Product Overview
The ATSAMD21G18A-AU is a low-power microcontroller utilizing the 32-bit Arm® Cortex®-M0+ processor. Available in 48-pin configuration with up to 256 KB Flash and 32 KB of SRAM, it operates at a maximum frequency of 48 MHz and achieves 2.46 CoreMark/MHz. Designed for seamless migration within the product series, it features identical peripheral modules, hex compatible code, identical linear address map, and pin compatible migration paths.
Technical Specifications
| Series | SAM D21G, Functional Safety (FuSa) |
| Core Processor | ARM® Cortex®-M0+ |
| Core Size | 32-Bit |
| Speed | 48MHz |
| Connectivity | I2C, LINbus, SPI, UART/USART, USB |
| Peripherals | Brown-out Detect/Reset, DMA, I2S, POR, PWM, WDT |
| Number of I/O | 38 |
| Program Memory Size | 256KB (256K x 8) |
| Program Memory Type | FLASH |
| RAM Size | 32K x 8 |
| Voltage Supply | 1.62V ~ 3.6V |
| Data Converters | A/D 14x12b; D/A 1x10b |
| Oscillator Type | Internal |
| Operating Temperature | -40°C ~ 85°C (TA) |
| Mounting Type | Surface Mount |
| Supplier Device Package | 48-TQFP (7x7) |
| Package / Case | 48-TQFP |
Key Features
Single-cycle hardware multiplier
Micro Trace Buffer
256KB in-system self-programmable Flash
32KB SRAM Memory
Power-on reset (POR) and brown-out detection (BOD)
Internal and external clock options with 48MHz Digital Frequency Locked Loop (DFLL48M)
External Interrupt Controller (EIC) with 16 external interrupts
Two-pin Serial Wire Debug (SWD) programming interface
Drop-in compatible with SAM D20
Idle and standby sleep modes with SleepWalking peripherals
12-channel Direct Memory Access Controller (DMAC)
12-channel Event System
Multiple timer/counter configurations
Synchronized PWM pattern generation
Deterministic fault protection and configurable dead-time
Dithering for increased resolution
32-bit Real Time Counter (RTC) with clock/calendar
Watchdog Timer (WDT)
CRC-32 generator
Embedded device function with eight endpoints
Comprehensive communication interfaces
Advanced analog capabilities
10-bit, 350ksps Digital-to-Analog Converter (DAC)
Two Analog Comparators (AC) with window compare
256-channel capacitive touch and proximity sensing
38 GPIO pins
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Frequently Asked Questions
Are your products original?
Yes, all products are original, new original import is our purpose.
Which Certificates do you have?
We are ISO 9001:2015 Certified Company and member of ERAI.
Can you support small quantity order or sample? Is the sample free?
Yes, we support sample orders and small orders. Sample cost varies according to your order or project requirements.
How to ship my order? Is it safe?
We use express carriers such as DHL, FedEx, UPS, TNT, and EMS. We can also use your suggested forwarder. Products are carefully packaged to ensure safety, and we take responsibility for any damage to your order.
What about the lead time?
We can ship stock parts within 5 working days. For items not in stock, we will confirm the lead time based on your order quantity.
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