{"id":3524,"date":"2026-06-06T10:01:12","date_gmt":"2026-06-06T10:01:12","guid":{"rendered":"https:\/\/materialparts.com\/atmega32u4-au\/"},"modified":"2026-06-06T10:01:12","modified_gmt":"2026-06-06T10:01:12","slug":"atmega32u4-au","status":"publish","type":"post","link":"https:\/\/materialparts.com\/zh\/atmega32u4-au\/","title":{"rendered":"ATMEGA32U4-AU"},"content":{"rendered":"

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

The ATMEGA32U4-AU from Microchip Technology is a low-power 8-bit AVR RISC microcontroller with 32KB ISP Flash, 2.5KB SRAM, 1KB EEPROM, and an integrated USB 2.0 full-speed device controller. Housed in a 44-pin TQFP package (10x10mm), it operates at up to 16 MHz with a 2.7V to 5.5V supply, making it ideal for USB HID devices and Arduino-compatible designs.<\/p>\n

\u4e3b\u8981\u89c4\u683c<\/h2>\n\n\n\n\n\n\n\n\n\n\n\n\n
\u6838\u5fc3<\/td>\n8-bit AVR RISC<\/td>\n<\/tr>\n
\u95ea\u5149\u706f<\/td>\n32 KB (ISP)<\/td>\n<\/tr>\n
SRAM<\/td>\n2.5 KB<\/td>\n<\/tr>\n
EEPROM<\/td>\n1 KB<\/td>\n<\/tr>\n
Max Clock<\/td>\n16 MHz<\/td>\n<\/tr>\n
\u7535\u6e90\u7535\u538b<\/td>\n2.7V – 5.5V<\/td>\n<\/tr>\n
I\/O Pins<\/td>\n26<\/td>\n<\/tr>\n
ADC<\/td>\n12-channel 10-bit<\/td>\n<\/tr>\n
USB<\/td>\nUSB 2.0 Full-Speed Device<\/td>\n<\/tr>\n
\u5305\u88c5<\/td>\nTQFP-44 (10x10mm)<\/td>\n<\/tr>\n
Operating Temp<\/td>\n-40 to 85 C<\/td>\n<\/tr>\n<\/table>\n

\u7279\u70b9<\/h2>\n
    \n
  • Integrated USB 2.0 full-speed device controller with on-chip transceiver<\/li>\n
  • On-chip PLL for USB clock generation without external crystal<\/li>\n
  • 12-channel 10-bit ADC with differential mode<\/li>\n
  • Multiple interfaces: SPI, UART, I2C<\/li>\n
  • Up to 11 PWM channels for motor control and LED dimming<\/li>\n
  • Power-on reset, Brown-out detection, and Watchdog timer<\/li>\n<\/ul>\n

    \u5e94\u7528<\/h2>\n
      \n
    • USB HID devices (keyboards, mice, game controllers)<\/li>\n
    • Arduino Leonardo and Micro boards<\/li>\n
    • Embedded USB data acquisition systems<\/li>\n
    • Portable instrumentation and consumer electronics<\/li>\n
    • Industrial control with USB communication<\/li>\n<\/ul>","protected":false},"excerpt":{"rendered":"

      Product Overview The ATMEGA32U4-AU from Microchip Technology is a low-power 8-bit AVR RISC microcontroller with 32KB ISP Flash, 2.5KB SRAM, 1KB EEPROM, and an integrated USB 2.0 full-speed device controller. Housed in a 44-pin TQFP package (10x10mm), it operates at up to 16 MHz with a 2.7V to 5.5V supply, making it ideal for USB […]<\/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-3524","post","type-post","status-publish","format-standard","hentry","category-integrated-circuits-ics","category-microcontrollers-mcu","chip_brand-microchip"],"acf":{"brief_explanation":"8-bit AVR MCU, 32KB Flash, 2.5KB SRAM, integrated USB 2.0, TQFP-44","date_code":"","package_case":"TQFP-44 (10 x 10 mm)","in_stock":12476,"datasheet":"https:\/\/ww1.microchip.com\/downloads\/en\/DeviceDoc\/Atmel-7766-8-bit-AVR-ATmega16U4-32U4_Datasheet.pdf","price":"$3.64 @ 1ku","product_introduction":"The ATMEGA32U4-AU from Microchip Technology is an 8-bit AVR RISC microcontroller featuring 32KB ISP Flash, 2.5KB SRAM, and 1KB EEPROM. Its integrated USB 2.0 full-speed device controller eliminates the need for an external USB-to-serial converter, enabling direct USB connectivity for HID devices and custom USB peripherals. The device achieves up to 16 MIPS at 16 MHz with single-cycle instruction execution. With 26 GPIO pins, 12-channel 10-bit ADC, and multiple communication interfaces, it provides a comprehensive single-chip solution for embedded USB applications.","working_principle":"The ATMEGA32U4-AU is based on the AVR enhanced RISC architecture with 32 general-purpose registers tightly coupled to the ALU. The Harvard architecture provides separate program and data buses for parallel instruction fetch and execution. The integrated USB controller manages all protocol layers including packet formatting, CRC generation, and endpoint buffering using 832 bytes of dedicated DPRAM. The USB transceiver handles electrical signaling at full-speed (12 Mbps) or low-speed (1.5 Mbps). The ADC uses a successive approximation architecture with a sample-and-hold circuit.","pin_description":"
      Pin<\/th>Name<\/th>Type<\/th>Function<\/th><\/tr>
      1<\/td>PE6<\/td>I\/O<\/td>Port E \/ INT6 \/ AIN0<\/td><\/tr>
      2<\/td>UVCC<\/td>Power<\/td>USB regulator supply<\/td><\/tr>
      3<\/td>D-<\/td>I\/O<\/td>USB data negative<\/td><\/tr>
      4<\/td>D+<\/td>I\/O<\/td>USB data positive<\/td><\/tr>
      5<\/td>UGND<\/td>GND<\/td>USB ground<\/td><\/tr>
      6<\/td>UCAP<\/td>Power<\/td>USB regulator output<\/td><\/tr>
      7<\/td>VBUS<\/td>Input<\/td>USB VBUS sense<\/td><\/tr>
      8-14<\/td>PB0-PB6<\/td>I\/O<\/td>Port B \/ SPI \/ Timers<\/td><\/tr>
      15-44<\/td>PB7-PA7<\/td>I\/O<\/td>Port B-F-A \/ ADC \/ UART<\/td><\/tr><\/table>","application_scenarios":"
      • USB HID devices: keyboards, mice, game controllers<\/li>
      • Arduino Leonardo and Micro development boards<\/li>
      • Custom USB data acquisition and instrumentation<\/li>
      • Portable medical devices with USB connectivity<\/li>
      • Industrial control with USB communication interface<\/li><\/ul>","alternative_models":"
        Manufacturer<\/th>Part Number<\/th>Package<\/th>Notes<\/th><\/tr>
        Microchip<\/td>ATMEGA16U4-AU<\/td>TQFP-44<\/td>16KB Flash, pin-compatible<\/td><\/tr>
        Microchip<\/td>AT90USB1286-AU<\/td>TQFP-64<\/td>128KB Flash, USB host<\/td><\/tr>
        ST<\/td>STM32F103C8T6<\/td>LQFP-48<\/td>Cortex-M3, USB FS<\/td><\/tr>
        NXP<\/td>LPC11U35FHI33<\/td>HVQFN-33<\/td>Cortex-M0, USB<\/td><\/tr><\/table>"},"_links":{"self":[{"href":"https:\/\/materialparts.com\/zh\/wp-json\/wp\/v2\/posts\/3524","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=3524"}],"version-history":[{"count":0,"href":"https:\/\/materialparts.com\/zh\/wp-json\/wp\/v2\/posts\/3524\/revisions"}],"wp:attachment":[{"href":"https:\/\/materialparts.com\/zh\/wp-json\/wp\/v2\/media?parent=3524"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/materialparts.com\/zh\/wp-json\/wp\/v2\/categories?post=3524"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/materialparts.com\/zh\/wp-json\/wp\/v2\/tags?post=3524"},{"taxonomy":"chip_brand","embeddable":true,"href":"https:\/\/materialparts.com\/zh\/wp-json\/wp\/v2\/chip_brand?post=3524"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}