ATSAMD21E15B-AUT

ATSAMD21E15B-AUT is Microchip’s SAM D21 family microcontroller based on a 32‑bit ARM Cortex‑M0+ core. It typically runs up to ~48 MHz and targets low‑power embedded tasks. It combines Flash and RAM (tens of KB range) with a rich peripheral set: SERCOMs for I2C/SPI/UART, a 12‑bit ADC (and DAC on some variants), timers, an Event System, EIC, and often USB Full‑Speed device. It supports multiple sleep modes and a wide supply range (roughly 1.8–3.6 V). The -AUT suffix denotes automotive/extended temperature and reliability (e.g., broader operating range, automotive-grade quality). Typical uses include sensors, small motor/control tasks, and lightweight embedded systems in consumer/industrial applications. Development tools include MPLAB X or Microchip Studio with ASF; programming/debug via SWD. For exact memory sizes, package options, and features, consult the official datasheet and product page.

Equivalent products are other devices in Microchip’s SAM D21 family with the same memory footprint (32 KB flash, 16 KB RAM) and similar peripherals. The closest cross-refs from Microchip are the ATSAMD21E15A/B variants in different packages, e.g., ATSAMD21E15B-MU or ATSAMD21E15B-AU. For an exact drop-in, use Microchip’s Device Cross Reference or a distributor’s equivalents tool (by package and temperature grade).

- Pin count: 32 pins (QFN 32 package, AUT variant)
- Function: 32‑bit ARM Cortex‑M0+ microcontroller (SAM D21 family) with onboard flash, RAM, and integrated peripherals for general-purpose control.

- Manufacturer: Microchip Technology Inc.
- What kind of company: A global semiconductor company that designs and manufactures microcontrollers (including the SAM D series), memory, and analog/mixed-signal ICs for embedded systems (headquartered in Chandler, Arizona, USA).

ATSAMD21E15B-AUT is a low‑power 32‑bit Cortex‑M0+ MCU with USB and multiple SERCOMs. Typical applications include:
- USB device peripherals (hubs, keyboards/mice, USB sensors)
- Battery‑powered IoT edge nodes and wireless sensors
- Wearables and portable medical/fitness devices
- Home automation and smart appliances
- Industrial sensing and embedded control
- Automotive electronics (AUT grade for body electronics and sensors)
These leverage its USB capability, low power sleep modes, and flexible peripherals.

AUT indicates a 32‑pin QFN/UQFN package for the ATSAMD21E15B, specifically a 4×4 mm QFN with an exposed pad (EP).