{"id":3581,"date":"2026-06-06T10:57:53","date_gmt":"2026-06-06T10:57:53","guid":{"rendered":"https:\/\/materialparts.com\/atmega1284p-au\/"},"modified":"2026-06-06T10:57:53","modified_gmt":"2026-06-06T10:57:53","slug":"atmega1284p-au","status":"publish","type":"post","link":"https:\/\/materialparts.com\/zh\/atmega1284p-au\/","title":{"rendered":"ATMEGA1284P-AU"},"content":{"rendered":"

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

The ATMEGA1284P-AU from Microchip Technology is an 8-bit AVR RISC microcontroller with 128KB Flash, 16KB SRAM, and 4KB EEPROM. Running at 20 MHz with picoPower technology, it features dual USARTs, 3 SPI, JTAG debug, 8-channel 10-bit ADC, and 32 I\/O pins in a 44-pin TQFP (10x10mm) package.<\/p>\n

\u4e3b\u8981\u89c4\u683c<\/h2>\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n
\u6838\u5fc3<\/td>\nAVR Enhanced RISC (8-bit)<\/td>\n<\/tr>\n
Max Clock<\/td>\n20 MHz<\/td>\n<\/tr>\n
\u95ea\u5149\u706f<\/td>\n128 KB<\/td>\n<\/tr>\n
SRAM<\/td>\n16 KB<\/td>\n<\/tr>\n
EEPROM<\/td>\n4 KB<\/td>\n<\/tr>\n
ADC<\/td>\n10-bit, 8 channels, differential with PGA<\/td>\n<\/tr>\n
\u8ba1\u65f6\u5668<\/td>\n4 (2x 8-bit, 2x 16-bit)<\/td>\n<\/tr>\n
USARTs<\/td>\n2 (with hardware SPI support)<\/td>\n<\/tr>\n
SPI<\/td>\n3 (including USART in SPI mode)<\/td>\n<\/tr>\n
I2C\/TWI<\/td>\n1<\/td>\n<\/tr>\n
PWM<\/td>\n6 channels<\/td>\n<\/tr>\n
Comparators<\/td>\n1 (with multiplexed inputs)<\/td>\n<\/tr>\n
I\/O Pins<\/td>\n32<\/td>\n<\/tr>\n
\u7535\u6e90\u7535\u538b<\/td>\n1.8V – 5.5V<\/td>\n<\/tr>\n
picoPower<\/td>\nYes (ultra-low power in active and sleep)<\/td>\n<\/tr>\n
\u5305\u88c5<\/td>\nTQFP-44 (10 x 10 mm)<\/td>\n<\/tr>\n
Operating Temp<\/td>\n-40 to 85 C<\/td>\n<\/tr>\n<\/table>\n

\u7279\u70b9<\/h2>\n
    \n
  • 128KB Flash with 16KB SRAM (8x Arduino Uno SRAM) and 4KB EEPROM<\/li>\n
  • picoPower technology for ultra-low power consumption<\/li>\n
  • Dual independent USARTs for simultaneous serial communication<\/li>\n
  • 8-channel 10-bit ADC with optional differential input and programmable gain<\/li>\n
  • JTAG interface for on-chip debugging and boundary scan<\/li>\n
  • 6 software-selectable power saving modes including Power-Down at 100 nA<\/li>\n
  • 32 general-purpose I\/O lines with internal pull-up resistors<\/li>\n
  • 32 general-purpose working registers for efficient C code execution<\/li>\n<\/ul>\n

    \u5e94\u7528<\/h2>\n
      \n
    • 3D printer controllers (Reprap, Melzi)<\/li>\n
    • IoT sensor nodes with dual serial interfaces<\/li>\n
    • Home automation with 16KB SRAM for protocol stacks<\/li>\n
    • Battery-powered data loggers with picoPower<\/li>\n
    • Industrial control with JTAG debug capability<\/li>\n<\/ul>","protected":false},"excerpt":{"rendered":"

      Product Overview The ATMEGA1284P-AU from Microchip Technology is an 8-bit AVR RISC microcontroller with 128KB Flash, 16KB SRAM, and 4KB EEPROM. Running at 20 MHz with picoPower technology, it features dual USARTs, 3 SPI, JTAG debug, 8-channel 10-bit ADC, and 32 I\/O pins in a 44-pin TQFP (10x10mm) package. Key Specifications Core AVR Enhanced RISC […]<\/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-3581","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, 20MHz, 128KB Flash, 16KB SRAM, 4KB EEPROM, dual USART, TQFP-44","date_code":"","package_case":"TQFP-44 (10.0 x 10.0 x 1.20 mm)","in_stock":3791,"datasheet":"https:\/\/ww1.microchip.com\/downloads\/en\/DeviceDoc\/Atmel-8272-8-bit-AVR-microcontroller-ATmega164A_PA-324A_PA-644A_PA-1284_P_datasheet.pdf","price":"$4.20 @ 1ku","product_introduction":"The ATMEGA1284P-AU from Microchip Technology is a high-performance, low-power 8-bit AVR RISC microcontroller combining 128KB ISP Flash with read-while-write capability, 16KB SRAM (the largest in the ATmega product line for 8-bit designs), and 4KB EEPROM. Operating at up to 20 MHz, it achieves near 1 MIPS per MHz throughput. The picoPower technology minimizes power consumption in both active and sleep modes, with Power-Down mode consuming as little as 100 nA. Dual independent USARTs enable simultaneous communication with two serial devices. The 8-channel 10-bit ADC supports optional differential input with programmable gain for direct sensor interfacing.","working_principle":"The ATMEGA1284P-AU uses the AVR enhanced RISC architecture with 131 instructions, most executing in a single clock cycle. The 32 general-purpose working registers are directly connected to the ALU, allowing two registers to be accessed in one instruction and enabling efficient C compiler code generation. The 16KB SRAM is particularly significant for applications requiring large data buffers such as network protocol stacks (TCP\/IP), display frame buffers, or 3D printer motion planning. The Harvard architecture separates program memory (Flash) from data memory (SRAM), with a 16-bit program counter addressing 128KB Flash and 16-bit data pointers accessing the full 16KB SRAM. The dual USARTs are independent with separate baud rate generators, enabling concurrent communication at different speeds. The ADC uses a successive approximation architecture with 10-bit resolution and auto-triggering capability from timer compare matches for precise sampling intervals.","pin_description":"
      Pin<\/th>Name<\/th>Type<\/th>Function<\/th><\/tr>
      VCC<\/td>2<\/td>Power<\/td>Supply (1.8-5.5V)<\/td><\/tr>
      GND<\/td>3<\/td>Ground<\/td>Ground<\/td><\/tr>
      AVCC<\/td>1<\/td>Power<\/td>ADC supply<\/td><\/tr>
      AREF<\/td>1<\/td>Reference<\/td>ADC reference voltage<\/td><\/tr>
      PA0-PA7<\/td>8<\/td>I\/O<\/td>Port A - ADC channels 0-7, JTAG<\/td><\/tr>
      PB0-PB7<\/td>8<\/td>I\/O<\/td>Port B - SPI, USART0, timer I\/O<\/td><\/tr>
      PC0-PC7<\/td>8<\/td>I\/O<\/td>Port C - TWI, JTAG (TCK\/TMS\/TDI\/TDO)<\/td><\/tr>
      PD0-PD7<\/td>8<\/td>I\/O<\/td>Port D - USART0\/1, INT0-3, timer I\/O<\/td><\/tr>
      XTAL1\/XTAL2<\/td>2<\/td>I\/O<\/td>Oscillator pins<\/td><\/tr>
      RESET<\/td>1<\/td>Input<\/td>Reset (active low)<\/td><\/tr><\/table>","application_scenarios":"
      • 3D printers: 16KB SRAM for motion planning, dual UART for host and LCD<\/li>
      • IoT nodes: picoPower sleep modes with dual USART for WiFi + GPS modules<\/li>
      • Home automation: TCP\/IP stack in 16KB SRAM with TWI sensor bus<\/li>
      • Data loggers: 4KB EEPROM for calibration + 128KB Flash for firmware<\/li>
      • Industrial control: JTAG debug with differential ADC for sensor measurement<\/li><\/ul>","alternative_models":"
        Manufacturer<\/th>Part Number<\/th>Package<\/th>Notes<\/th><\/tr>
        Microchip<\/td>ATMEGA1284P-PU<\/td>PDIP-40<\/td>40-pin DIP, same die, prototyping<\/td><\/tr>
        Microchip<\/td>ATMEGA644P-AU<\/td>TQFP-44<\/td>64KB Flash, 4KB SRAM, lower cost<\/td><\/tr>
        Microchip<\/td>ATMEGA2560-16AU<\/td>TQFP-100<\/td>256KB Flash, 8KB SRAM, more I\/O<\/td><\/tr>
        ST<\/td>STM32F103C8T6<\/td>LQFP-48<\/td>ARM M3, 72 MHz, 20KB SRAM, 64KB Flash<\/td><\/tr><\/table>"},"_links":{"self":[{"href":"https:\/\/materialparts.com\/zh\/wp-json\/wp\/v2\/posts\/3581","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=3581"}],"version-history":[{"count":0,"href":"https:\/\/materialparts.com\/zh\/wp-json\/wp\/v2\/posts\/3581\/revisions"}],"wp:attachment":[{"href":"https:\/\/materialparts.com\/zh\/wp-json\/wp\/v2\/media?parent=3581"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/materialparts.com\/zh\/wp-json\/wp\/v2\/categories?post=3581"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/materialparts.com\/zh\/wp-json\/wp\/v2\/tags?post=3581"},{"taxonomy":"chip_brand","embeddable":true,"href":"https:\/\/materialparts.com\/zh\/wp-json\/wp\/v2\/chip_brand?post=3581"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}