ATSAMD21G18 - Electronic component Microchip - Free user manual and instructions
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| Product Type | Microcontroller Unit (MCU) |
| Manufacturer | Microchip Technology |
| Model | ATSAMD21G18 |
| Core Processor | ARM Cortex-M0+ |
| Architecture | 32-bit |
| Maximum Clock Speed | 48 MHz |
| Flash Memory | 256 KB |
| SRAM | 32 KB |
| Operating Voltage Range | 1.62 V to 3.63 V |
| GPIO Pins | 52 (in TQFP64 package) |
| ADC Channels | 14 (12-bit SAR ADC) |
| DAC Channels | 1 (10-bit) |
| Communication Interfaces | SPI, I2C, UART, I2S, USB 2.0 |
| Package Type | TQFP-64 |
| Package Dimensions | 10 mm x 10 mm x 1.0 mm |
| Operating Temperature Range | -40°C to +85°C |
| Power Consumption (Active) | ~2-5 mA typical at 48 MHz |
| Power Consumption (Sleep) | ~1 µA typ. in standby |
| Maintenance | None required; handle with ESD precautions |
| Safety Precautions | Avoid static discharge; do not exceed max voltage |
| Spare Parts / Repairability | Component is not field-repairable; replace if faulty |
| General Information | 32-bit MCU with USB and advanced analog features |
Frequently Asked Questions - ATSAMD21G18 Microchip
What development tools support the ATSAMD21G18?
The ATSAMD21G18 is supported by Atmel Studio (now Microchip Studio), Arduino IDE (via Arduino Zero or MKR boards), and ARM Keil MDK.
Can the ATSAMD21G18 be powered by USB?
Yes, it has a built-in USB interface and can run directly from the USB 5V supply via its internal voltage regulator, as long as the input voltage is within the operating range.
How many analog inputs does it have?
It has 14 analog-to-digital converter (ADC) channels with 12-bit resolution, and one 10-bit digital-to-analog converter (DAC) output.
What is the maximum clock speed?
The maximum clock speed is 48 MHz, achieved using an external crystal or internal oscillator.
Does it have hardware USB support?
Yes, it features a full-speed USB 2.0 device interface with dedicated internal oscillators, eliminating the need for an external crystal for USB operation.
What is the operating voltage range?
The recommended operating voltage is 1.62 V to 3.63 V.
Can I use the ATSAMD21G18 with an Arduino IDE?
Yes, Arduino boards like the Arduino Zero and Arduino MKR series use this MCU, so you can program it using the Arduino IDE with the appropriate board package.
How much flash and SRAM does it have?
It has 256 KB of flash memory and 32 KB of SRAM.
What is the package size?
The ATSAMD21G18 is available in a TQFP-64 package measuring 10 mm x 10 mm with a 1.0 mm thickness.
Does it have a built-in oscillator?
Yes, it includes an internal 48 MHz RC oscillator with ±1% accuracy, and also supports external crystal oscillators for higher precision.
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USER MANUAL ATSAMD21G18 Microchip
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Product information
Brand : Microchip
Model : ATSAMD21G18
Category : Electronic component