{"id":6901,"date":"2026-06-22T01:57:21","date_gmt":"2026-06-22T01:57:21","guid":{"rendered":"https:\/\/materialparts.com\/atmega4809-au\/"},"modified":"2026-06-22T01:57:21","modified_gmt":"2026-06-22T01:57:21","slug":"atmega4809-au","status":"publish","type":"post","link":"https:\/\/materialparts.com\/zh\/atmega4809-au\/","title":{"rendered":"ATmega4809-AU"},"content":{"rendered":"

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

The ATmega4809-AU from Microchip Technology is an 8-bit AVR microcontroller with 48KB Flash, 6KB SRAM, 41 I\/O pins, and 12-channel 10-bit ADC in a TQFP-48 package.<\/p>\n

\u4e3b\u8981\u89c4\u683c<\/h2>\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n
\u7c7b\u578b<\/td>\n8-bit AVR Microcontroller<\/td>\n<\/tr>\n
Max Frequency<\/td>\n20 MHz<\/td>\n<\/tr>\n
\u95ea\u5149\u706f<\/td>\n48 KB<\/td>\n<\/tr>\n
SRAM<\/td>\n6 KB<\/td>\n<\/tr>\n
EEPROM<\/td>\n256 bytes<\/td>\n<\/tr>\n
I\/O Pins<\/td>\n41<\/td>\n<\/tr>\n
ADC<\/td>\n12 channels x 10-bit<\/td>\n<\/tr>\n
\u4ea4\u6d41<\/td>\n1x USART, 1x SPI, 1x TWI (I2C)<\/td>\n<\/tr>\n
\u8ba1\u65f6\u5668<\/td>\n4 (1x TCB + 1x TCA + 2x TCD)<\/td>\n<\/tr>\n
PWM<\/td>\n6 channels<\/td>\n<\/tr>\n
Event System<\/td>\nYes<\/td>\n<\/tr>\n
\u7535\u6e90\u7535\u538b<\/td>\n1.8V to 5.5V<\/td>\n<\/tr>\n
\u5305\u88c5<\/td>\nTQFP-48 (7 x 7 mm)<\/td>\n<\/tr>\n
\u5de5\u4f5c\u6e29\u5ea6<\/td>\n-40C to +85C<\/td>\n<\/tr>\n<\/table>\n

\u7279\u70b9<\/h2>\n
    \n
  • 48KB Flash and 6KB SRAM<\/li>\n
  • Event system for peripheral interconnection without CPU<\/li>\n
  • Configurable Custom Logic (CCL)<\/li>\n
  • Single-cycle I\/O access<\/li>\n
  • Peripheral Touch Controller (PTC) for capacitive sensing<\/li>\n
  • UPDI programming interface<\/li>\n<\/ul>\n

    \u5e94\u7528<\/h2>\n
      \n
    • Embedded control systems<\/li>\n
    • Capacitive touch interfaces<\/li>\n
    • IoT sensor nodes<\/li>\n
    • Home automation<\/li>\n<\/ul>","protected":false},"excerpt":{"rendered":"

      Product Overview The ATmega4809-AU from Microchip Technology is an 8-bit AVR microcontroller with 48KB Flash, 6KB SRAM, 41 I\/O pins, and 12-channel 10-bit ADC in a TQFP-48 package. Key Specifications Type 8-bit AVR Microcontroller Max Frequency 20 MHz Flash 48 KB SRAM 6 KB EEPROM 256 bytes I\/O Pins 41 ADC 12 channels x 10-bit […]<\/p>\n","protected":false},"author":2,"featured_media":0,"comment_status":"open","ping_status":"","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[13,25],"tags":[],"chip_brand":[134],"class_list":["post-6901","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, 48KB Flash, 6KB SRAM, Event System, TQFP-48","date_code":"","package_case":"TQFP-48 (7 x 7 x 1.0 mm)","in_stock":6789,"datasheet":"https:\/\/ww1.microchip.com\/downloads\/en\/DeviceDoc\/ATmega4808-4809-Data-Sheet-DS40002173A.pdf","price":"$1.50 @ 1ku","product_introduction":"The ATmega4809-AU from Microchip Technology is a modern 8-bit AVR microcontroller from the megaAVR 0-series, offering 48KB Flash and 6KB SRAM in a TQFP-48 package. The device introduces advanced features not found in classic AVR devices: an Event System that allows peripherals to communicate directly without CPU intervention, Configurable Custom Logic (CCL) that implements glue logic in hardware, and a Peripheral Touch Controller (PTC) for capacitive sensing without external components. The UPDI (Unified Program and Debug Interface) single-pin programming interface simplifies board design. The 41 I\/O pins provide extensive connectivity, while the 12-channel 10-bit ADC supports multi-sensor applications. The 6KB SRAM is significantly larger than classic ATmega devices, enabling more complex algorithms and communication buffers.","working_principle":"The ATmega4809 uses an enhanced AVR 8-bit RISC architecture where most instructions execute in a single clock cycle at 20 MHz. The CPU accesses I\/O registers in a single cycle, providing deterministic peripheral control. The Event System is a 6-channel routing network that connects event generators (timer overflows, pin changes, ADC completions) to event users (timer inputs, DMA triggers, CCL inputs) without software intervention, enabling real-time response with zero CPU overhead. The CCL implements programmable combinational and sequential logic (LUTs with optional flip-flops) that can replace external glue logic ICs. The PTC performs capacitive touch sensing by measuring the charge transfer between the sensor pad and an internal sampling capacitor, providing touch detection without external components. The UPDI interface uses a single-wire bidirectional protocol for programming and debugging, replacing the 4-wire ISP interface of classic AVR devices.","pin_description":"
      Pin Group<\/th>Name<\/th>Type<\/th>Function<\/th><\/tr>
      Multiple<\/td>PA0-PA7, PB0-PB7, etc.<\/td>I\/O<\/td>41 programmable digital I\/O pins<\/td><\/tr>
      Analog<\/td>AIN0-AIN11<\/td>Input<\/td>12 ADC input channels<\/td><\/tr>
      Serial<\/td>TXD\/RXD<\/td>I\/O<\/td>USART serial port<\/td><\/tr>
      Serial<\/td>MOSI\/MISO\/SCK\/SS<\/td>I\/O<\/td>SPI port<\/td><\/tr>
      Serial<\/td>SDA\/SCL<\/td>I\/O<\/td>TWI\/I2C port<\/td><\/tr>
      Debug<\/td>UPDI<\/td>I\/O<\/td>Single-pin programming\/debug<\/td><\/tr>
      Power<\/td>VDD\/VSS<\/td>Power<\/td>Supply and ground<\/td><\/tr><\/table>","application_scenarios":"
      • Smart home thermostat with PTC capacitive touch buttons and 6KB SRAM for Wi-Fi buffer<\/li>
      • IoT sensor node with Event System for autonomous ADC-to-UART data streaming<\/li>
      • Industrial panel controller with CCL replacing external logic for LED multiplexing<\/li>
      • Motor control application with 6-channel PWM and 48KB Flash for FOC algorithm<\/li><\/ul>","alternative_models":"
        Manufacturer<\/th>Part Number<\/th>Package<\/th>Notes<\/th><\/tr>
        Microchip<\/td>ATmega4808-AU<\/td>TQFP-32<\/td>Same core, fewer pins (28 I\/O)<\/td><\/tr>
        Microchip<\/td>ATmega3209-AU<\/td>TQFP-48<\/td>32KB Flash, lower cost<\/td><\/tr>
        Microchip<\/td>ATmega2560-AU<\/td>TQFP-100<\/td>Classic AVR, 256KB Flash, more I\/O<\/td><\/tr>
        ST<\/td>STM32G070CBT6<\/td>LQFP-48<\/td>32-bit ARM, similar pin count<\/td><\/tr>
        Renesas<\/td>R7FA2E1A72DFK<\/td>LQFP-48<\/td>RA2E1 ARM Cortex-M23, 128KB<\/td><\/tr><\/table>"},"_links":{"self":[{"href":"https:\/\/materialparts.com\/zh\/wp-json\/wp\/v2\/posts\/6901","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=6901"}],"version-history":[{"count":0,"href":"https:\/\/materialparts.com\/zh\/wp-json\/wp\/v2\/posts\/6901\/revisions"}],"wp:attachment":[{"href":"https:\/\/materialparts.com\/zh\/wp-json\/wp\/v2\/media?parent=6901"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/materialparts.com\/zh\/wp-json\/wp\/v2\/categories?post=6901"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/materialparts.com\/zh\/wp-json\/wp\/v2\/tags?post=6901"},{"taxonomy":"chip_brand","embeddable":true,"href":"https:\/\/materialparts.com\/zh\/wp-json\/wp\/v2\/chip_brand?post=6901"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}