{"id":6288,"date":"2026-06-12T11:13:40","date_gmt":"2026-06-12T11:13:40","guid":{"rendered":"https:\/\/materialparts.com\/atsamd21j18a-au\/"},"modified":"2026-06-12T11:13:40","modified_gmt":"2026-06-12T11:13:40","slug":"atsamd21j18a-au","status":"publish","type":"post","link":"https:\/\/materialparts.com\/zh\/atsamd21j18a-au\/","title":{"rendered":"ATSAMD21J18A-AU"},"content":{"rendered":"

\u4ea7\u54c1\u6982\u89c8<\/h2>\n

The ATSAMD21J18A-AU from Microchip (formerly Atmel) is an ARM Cortex-M0+ microcontroller running at 48MHz with 256KB Flash and 32KB SRAM. It features 8 configurable SERCOM modules, USB 2.0, 12-bit ADC with 20 channels, and a 10-bit DAC, packaged in a TQFP-64 (10x10mm) footprint.<\/p>\n

\u4e3b\u8981\u89c4\u683c<\/h2>\n\n\n\n\n\n\n\n\n\n\n\n\n
\u6838\u5fc3<\/td>\nARM Cortex-M0+ @ 48MHz<\/td>\n<\/tr>\n
\u95ea\u5149\u706f<\/td>\n256KB<\/td>\n<\/tr>\n
SRAM<\/td>\n32KB<\/td>\n<\/tr>\n
Serial (SERCOM)<\/td>\n8 (configurable as UART\/SPI\/I2C)<\/td>\n<\/tr>\n
USB<\/td>\n1x USB 2.0 Full-Speed<\/td>\n<\/tr>\n
ADC<\/td>\n1x 12-bit, 20 channels<\/td>\n<\/tr>\n
\u53d1\u63f4\u4f1a<\/td>\n1x 10-bit<\/td>\n<\/tr>\n
\u8ba1\u65f6\u5668<\/td>\n6x TC, 3x TCC (PWM)<\/td>\n<\/tr>\n
\u7535\u6e90\u7535\u538b<\/td>\n1.62V – 3.63V<\/td>\n<\/tr>\n
\u5de5\u4f5c\u6e29\u5ea6<\/td>\n-40\u00b0C to +85\u00b0C (AU suffix)<\/td>\n<\/tr>\n
\u5305\u88c5<\/td>\nTQFP-64 (10x10mm)<\/td>\n<\/tr>\n<\/table>\n

\u7279\u70b9<\/h2>\n
    \n
  • Low-power ARM Cortex-M0+ core with single-cycle hardware multiplier<\/li>\n
  • 8 SERCOM modules with flexible UART\/SPI\/I2C configuration<\/li>\n
  • USB 2.0 Full-Speed device with integrated PHY<\/li>\n
  • 12-bit ADC up to 1MSPS with 20 input channels<\/li>\n
  • Event system for peripheral interconnect without CPU intervention<\/li>\n
  • DMA controller for efficient data transfer<\/li>\n<\/ul>\n

    \u5e94\u7528<\/h2>\n
      \n
    • IoT sensor nodes and edge devices<\/li>\n
    • USB peripherals and human interface devices<\/li>\n
    • Wearable electronics and health monitors<\/li>\n
    • Arduino and maker platform development<\/li>\n<\/ul>","protected":false},"excerpt":{"rendered":"

      Product Overview The ATSAMD21J18A-AU from Microchip (formerly Atmel) is an ARM Cortex-M0+ microcontroller running at 48MHz with 256KB Flash and 32KB SRAM. It features 8 configurable SERCOM modules, USB 2.0, 12-bit ADC with 20 channels, and a 10-bit DAC, packaged in a TQFP-64 (10x10mm) footprint. Key Specifications Core ARM Cortex-M0+ @ 48MHz Flash 256KB SRAM […]<\/p>\n","protected":false},"author":2,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[13,25],"tags":[],"chip_brand":[134],"class_list":["post-6288","post","type-post","status-publish","format-standard","hentry","category-integrated-circuits-ics","category-microcontrollers-mcu","chip_brand-microchip"],"acf":{"brief_explanation":"ARM Cortex-M0+ MCU, 48MHz, 256KB Flash, 32KB SRAM, 8xSERCOM, USB 2.0, TQFP-64","date_code":"","package_case":"TQFP-64 (10x10mm, 0.5mm pitch)","in_stock":2019,"datasheet":"https:\/\/ww1.microchip.com\/downloads\/en\/DeviceDoc\/SAMD21-Family-DataSheet-DS40001882D.pdf","price":"$3.12 @1ku","product_introduction":"The ATSAMD21J18A-AU is a high-performance ARM Cortex-M0+ microcontroller from Microchip Technology featuring 256KB Flash and 32KB SRAM. Running at 48MHz, it provides 8 configurable SERCOM modules that can be individually programmed as UART, SPI, or I2C interfaces, offering unmatched serial communication flexibility. The integrated USB 2.0 Full-Speed interface, 12-bit ADC, 10-bit DAC, and advanced timer\/PWM capabilities make it a versatile choice for IoT, wearable, and USB peripheral applications.","working_principle":"The ATSAMD21J18A-AU is built around the ARM Cortex-M0+ 32-bit RISC processor core executing Thumb instruction set code at up to 48MHz. The 8 SERCOM modules are independently configurable serial communication engines that can operate as UART, SPI, or I2C in any combination, reducing pin mux constraints. The event system allows peripherals to trigger actions in other peripherals without CPU intervention, reducing latency and power consumption. The DMA controller offloads data transfer tasks from the CPU. The USB 2.0 controller handles all protocol layers with minimal CPU overhead, supporting 8 endpoints for flexible device configurations.","pin_description":"
      Pin<\/th>Name<\/th>Description<\/th><\/tr>
      1-16<\/td>PA00-PA15<\/td>Port A GPIO and peripheral functions<\/td><\/tr>
      17-32<\/td>PA16-PA31<\/td>Port A GPIO and peripheral functions<\/td><\/tr>
      33-48<\/td>PB00-PB15<\/td>Port B GPIO and peripheral functions<\/td><\/tr>
      49-64<\/td>PB16-PB31<\/td>Port B GPIO and peripheral functions<\/td><\/tr>
      Special<\/td>VDDANA<\/td>Analog supply for ADC\/DAC<\/td><\/tr>
      Special<\/td>VDDIN<\/td>USB and I\/O supply<\/td><\/tr>
      Special<\/td>VDDCORE<\/td>Core voltage supply<\/td><\/tr><\/table>","application_scenarios":"
      • IoT sensor nodes with multi-protocol wireless connectivity<\/li>
      • USB HID devices (keyboards, mice, game controllers)<\/li>
      • Wearable health and fitness monitors<\/li>
      • Arduino Zero\/MKR platform development boards<\/li><\/ul>","alternative_models":"
        Model<\/th>Manufacturer<\/th>Core<\/th>Flash<\/th>RAM<\/th><\/tr>
        ATSAMD21G18A-AU<\/td>Microchip<\/td>M0+ 48MHz<\/td>256KB<\/td>32KB<\/td><\/tr>
        SAMD21J17A-AU<\/td>Microchip<\/td>M0+ 48MHz<\/td>128KB<\/td>16KB<\/td><\/tr>
        STM32L072V8<\/td>ST<\/td>M0+ 32MHz<\/td>64KB<\/td>20KB<\/td><\/tr>
        LPC824M201JHI33<\/td>NXP<\/td>M0+ 30MHz<\/td>32KB<\/td>8KB<\/td><\/tr><\/table>"},"_links":{"self":[{"href":"https:\/\/materialparts.com\/zh\/wp-json\/wp\/v2\/posts\/6288","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/materialparts.com\/zh\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/materialparts.com\/zh\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/materialparts.com\/zh\/wp-json\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/materialparts.com\/zh\/wp-json\/wp\/v2\/comments?post=6288"}],"version-history":[{"count":0,"href":"https:\/\/materialparts.com\/zh\/wp-json\/wp\/v2\/posts\/6288\/revisions"}],"wp:attachment":[{"href":"https:\/\/materialparts.com\/zh\/wp-json\/wp\/v2\/media?parent=6288"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/materialparts.com\/zh\/wp-json\/wp\/v2\/categories?post=6288"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/materialparts.com\/zh\/wp-json\/wp\/v2\/tags?post=6288"},{"taxonomy":"chip_brand","embeddable":true,"href":"https:\/\/materialparts.com\/zh\/wp-json\/wp\/v2\/chip_brand?post=6288"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}