{"id":7316,"date":"2026-06-24T03:37:54","date_gmt":"2026-06-24T03:37:54","guid":{"rendered":"https:\/\/ic-vendor.com\/atmega48-20au\/"},"modified":"2026-06-24T03:37:54","modified_gmt":"2026-06-24T03:37:54","slug":"atmega48-20au","status":"publish","type":"post","link":"https:\/\/ic-vendor.com\/zh\/atmega48-20au\/","title":{"rendered":"Atmega48-20AU"},"content":{"rendered":"

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

The ATmega48-20AU from Microchip (formerly Atmel) is a high-performance 8-bit AVR RISC microcontroller with 4KB Flash, 512B SRAM, 256B EEPROM, and 8-channel 10-bit ADC in a TQFP-32 package operating at up to 20MHz.<\/p>\n

\u4e3b\u8981\u89c4\u683c<\/h2>\n\n\n\n\n\n\n\n\n\n\n\n\n\n
\u6838\u5fc3<\/td>\nAVR 8-bit RISC, up to 20 MIPS @ 20MHz<\/td>\n<\/tr>\n
Flash Memory<\/td>\n4 KB<\/td>\n<\/tr>\n
SRAM<\/td>\n512 Bytes<\/td>\n<\/tr>\n
EEPROM<\/td>\n256 Bytes<\/td>\n<\/tr>\n
I\/O Pins<\/td>\n23<\/td>\n<\/tr>\n
ADC<\/td>\n8-channel, 10-bit<\/td>\n<\/tr>\n
Interfaces<\/td>\nUSART, SPI, TWI (I2C)<\/td>\n<\/tr>\n
\u8ba1\u65f6\u5668<\/td>\n2x 8-bit, 1x 16-bit<\/td>\n<\/tr>\n
PWM<\/td>\n6 channels<\/td>\n<\/tr>\n
\u7535\u6e90\u7535\u538b<\/td>\n1.8 V to 5.5 V<\/td>\n<\/tr>\n
\u5de5\u4f5c\u6e29\u5ea6<\/td>\n-40\u00b0C to +85\u00b0C<\/td>\n<\/tr>\n
\u5305\u88c5<\/td>\nTQFP-32 (7×7 mm)<\/td>\n<\/tr>\n<\/table>\n

\u7279\u70b9<\/h2>\n
    \n
  • 4KB Flash AVR MCU at 20MHz with 20 MIPS throughput in TQFP-32<\/li>\n
  • 6-channel PWM and 8-channel 10-bit ADC for mixed-signal control<\/li>\n
  • USART, SPI, and TWI (I2C) serial communication interfaces<\/li>\n
  • 6 sleep modes with Power-down current below 1uA<\/li>\n
  • debugWIRE on-chip debug interface via RESET pin<\/li>\n<\/ul>\n

    \u5e94\u7528<\/h2>\n
      \n
    • Cost-sensitive embedded control with mixed-signal requirements<\/li>\n
    • Motor control and power conversion with 6-channel PWM<\/li>\n
    • Sensor interface and data acquisition with 10-bit ADC<\/li>\n<\/ul>","protected":false},"excerpt":{"rendered":"

      Product Overview The ATmega48-20AU from Microchip (formerly Atmel) is a high-performance 8-bit AVR RISC microcontroller with 4KB Flash, 512B SRAM, 256B EEPROM, and 8-channel 10-bit ADC in a TQFP-32 package operating at up to 20MHz. Key Specifications Core AVR 8-bit RISC, up to 20 MIPS @ 20MHz Flash Memory 4 KB SRAM 512 Bytes EEPROM […]<\/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":[25],"tags":[],"chip_brand":[134],"class_list":["post-7316","post","type-post","status-publish","format-standard","hentry","category-microcontrollers-mcu","chip_brand-microchip"],"acf":{"brief_explanation":"AVR 8-bit 20MIPS MCU, 4KB Flash, 512B SRAM, 10-bit ADC, 6 PWM, USART\/SPI\/I2C, TQFP-32","date_code":"","package_case":"TQFP-32 (7.0 x 7.0 x 1.20 mm)","in_stock":8960,"datasheet":"https:\/\/ww1.microchip.com\/downloads\/en\/DeviceDoc\/Atmel-8025-8-bit-AVR-Microcontroller-ATmega48P-ATmega88P-ATmega168P_Datasheet.pdf","price":"$1.52 @ 1ku","product_introduction":"The ATmega48-20AU from Microchip is a low-power CMOS 8-bit microcontroller based on the AVR enhanced RISC architecture. By executing powerful instructions in a single clock cycle, the device achieves throughputs approaching 1 MIPS per MHz. The ATmega48 provides 4KB of In-System Programmable Flash, 512 bytes of SRAM, and 256 bytes of EEPROM. The 8-channel 10-bit ADC and 6 PWM channels support mixed-signal control applications. Communication interfaces include a programmable USART, Master\/Slave SPI, and Two-wire Serial Interface (I2C-compatible). The debugWIRE interface enables on-chip debugging using only the RESET pin. The -20AU suffix indicates 20MHz maximum speed grade and TQFP-32 package. The device operates from 1.8V to 5.5V with 6 sleep modes for power optimization.","working_principle":"The ATmega48-20AU operates as a modified Harvard architecture 8-bit RISC microcontroller. (1) AVR Core: The CPU fetches 16-bit instructions from Flash and executes most in a single clock cycle. The 32 general-purpose registers are directly connected to the ALU, enabling single-cycle register-to-register ALU operations. (2) Memory: The Flash supports In-System Programming (ISP) via SPI. The 512-byte SRAM provides fast data access with flexible addressing modes. The 256-byte EEPROM stores non-volatile data with 100,000 write cycle endurance. (3) ADC: The 10-bit successive approximation ADC converts analog inputs in 13-260us depending on prescaler setting. Auto-trigger mode allows timer or event-triggered conversions without CPU intervention. (4) PWM: The Timer\/Counter modules generate up to 6 PWM outputs, including fast PWM with variable frequency and phase-correct PWM for motor control. (5) debugWIRE: The on-chip debug system uses a single-wire bi-directional interface on the RESET pin, providing breakpoints and register access without dedicated debug pins.","pin_description":"
      Pin Group<\/th>Pins<\/th>Function<\/th><\/tr>
      Power<\/td>VCC, GND, AVCC<\/td>Supply and analog supply<\/td><\/tr>
      Port B<\/td>PB0-PB7<\/td>SPI, T\/C, OC, digital I\/O<\/td><\/tr>
      Port C<\/td>PC0-PC6<\/td>ADC, TWI, RESET, digital I\/O<\/td><\/tr>
      Port D<\/td>PD0-PD7<\/td>USART, INT, OC, digital I\/O<\/td><\/tr>
      Reset<\/td>PC6\/RESET<\/td>Reset or digital I\/O (fuse selectable)<\/td><\/tr>
      Reference<\/td>AREF<\/td>ADC reference voltage input<\/td><\/tr><\/table>","application_scenarios":"
      • Cost-sensitive motor control with 6 PWM and 10-bit ADC in TQFP-32<\/li>
      • Sensor interface and data acquisition with 8-channel 10-bit ADC<\/li>
      • General-purpose embedded control with USART\/SPI\/I2C at 20MHz<\/li><\/ul>","alternative_models":"
        Manufacturer<\/th>Part Number<\/th>Package<\/th>Notes<\/th><\/tr>
        Microchip<\/td>ATmega88-20AU<\/td>TQFP-32<\/td>8KB Flash, pin-compatible upgrade<\/td><\/tr>
        Microchip<\/td>ATmega168-20AU<\/td>TQFP-32<\/td>16KB Flash, pin-compatible upgrade<\/td><\/tr>
        Microchip<\/td>ATmega48P-20AU<\/td>TQFP-32<\/td>picoPower version, lower current<\/td><\/tr><\/table>"},"_links":{"self":[{"href":"https:\/\/ic-vendor.com\/zh\/wp-json\/wp\/v2\/posts\/7316","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/ic-vendor.com\/zh\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/ic-vendor.com\/zh\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/ic-vendor.com\/zh\/wp-json\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/ic-vendor.com\/zh\/wp-json\/wp\/v2\/comments?post=7316"}],"version-history":[{"count":0,"href":"https:\/\/ic-vendor.com\/zh\/wp-json\/wp\/v2\/posts\/7316\/revisions"}],"wp:attachment":[{"href":"https:\/\/ic-vendor.com\/zh\/wp-json\/wp\/v2\/media?parent=7316"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/ic-vendor.com\/zh\/wp-json\/wp\/v2\/categories?post=7316"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/ic-vendor.com\/zh\/wp-json\/wp\/v2\/tags?post=7316"},{"taxonomy":"chip_brand","embeddable":true,"href":"https:\/\/ic-vendor.com\/zh\/wp-json\/wp\/v2\/chip_brand?post=7316"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}