{"id":6817,"date":"2026-06-21T12:40:45","date_gmt":"2026-06-21T12:40:45","guid":{"rendered":"https:\/\/materialparts.com\/at91sam7s256d-mu\/"},"modified":"2026-06-21T12:40:45","modified_gmt":"2026-06-21T12:40:45","slug":"at91sam7s256d-mu","status":"publish","type":"post","link":"https:\/\/materialparts.com\/es\/at91sam7s256d-mu\/","title":{"rendered":"AT91SAM7S256D-MU"},"content":{"rendered":"

Productos<\/h2>\n

The AT91SAM7S256D-MU from Microchip Technology (formerly Atmel) is an ARM7TDMI-based 32-bit microcontroller running at 55 MHz with 256 KB Flash, 64 KB SRAM, USB 2.0 FS, and rich peripherals in a QFN-64 package.<\/p>\n

Especificaciones<\/h2>\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n
Tipo<\/td>\nARM7TDMI 32-bit Flash Microcontroller<\/td>\n<\/tr>\n
CPU<\/td>\nARM7TDMI, 55 MHz, 27 MIPS<\/td>\n<\/tr>\n
Flash<\/td>\n256 KB (1024 pages x 256 bytes)<\/td>\n<\/tr>\n
SRAM<\/td>\n64 KB (single-cycle access)<\/td>\n<\/tr>\n
USB<\/td>\n2.0 Full Speed Device (12 Mbps)<\/td>\n<\/tr>\n
USART<\/td>\n2x USART + 1x Debug UART<\/td>\n<\/tr>\n
SPI<\/td>\n1x Master\/Slave<\/td>\n<\/tr>\n
I2C (TWI)<\/td>\n1x Master\/Slave<\/td>\n<\/tr>\n
SSC<\/td>\n1x Synchronous Serial Controller<\/td>\n<\/tr>\n
ADC<\/td>\n8-channel, 10-bit, 4-channel multiplexed with digital I\/O<\/td>\n<\/tr>\n
PWM<\/td>\n4-channel 16-bit<\/td>\n<\/tr>\n
Timer\/Counter<\/td>\n3-channel 16-bit<\/td>\n<\/tr>\n
Tensi\u00f3n de alimentaci\u00f3n<\/td>\n1.65 V to 3.6 V (core via internal 1.8V regulator)<\/td>\n<\/tr>\n
E\/S<\/td>\n32 programmable I\/O lines<\/td>\n<\/tr>\n
Paquete<\/td>\nQFN-64 (9 x 9 mm)<\/td>\n<\/tr>\n
Temperatura de funcionamiento<\/td>\n-40C to +85C<\/td>\n<\/tr>\n<\/table>\n

Caracter\u00edsticas<\/h2>\n
    \n
  • ARM7TDMI 32-bit RISC core with 16-bit Thumb instruction set<\/li>\n
  • 256 KB Flash with 100K erase\/write cycles<\/li>\n
  • 64 KB SRAM with single-cycle access at max speed<\/li>\n
  • USB 2.0 FS device with embedded PHY<\/li>\n
  • Peripheral DMA Controller (11 channels)<\/li>\n
  • Embedded 1.8V regulator for core supply<\/li>\n
  • Advanced Interrupt Controller (AIC)<\/li>\n
  • IEEE 1149.1 JTAG boundary scan<\/li>\n<\/ul>\n

    Aplicaciones<\/h2>\n
      \n
    • USB devices and HID peripherals<\/li>\n
    • Industrial automation controllers<\/li>\n
    • Point-of-sale terminals<\/li>\n
    • Access control and security systems<\/li>\n<\/ul>","protected":false},"excerpt":{"rendered":"

      Product Overview The AT91SAM7S256D-MU from Microchip Technology (formerly Atmel) is an ARM7TDMI-based 32-bit microcontroller running at 55 MHz with 256 KB Flash, 64 KB SRAM, USB 2.0 FS, and rich peripherals in a QFN-64 package. Key Specifications Type ARM7TDMI 32-bit Flash Microcontroller CPU ARM7TDMI, 55 MHz, 27 MIPS Flash 256 KB (1024 pages x 256 […]<\/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-6817","post","type-post","status-publish","format-standard","hentry","category-integrated-circuits-ics","category-microcontrollers-mcu","chip_brand-microchip"],"acf":{"brief_explanation":"ARM7TDMI 55MHz MCU, 256KB Flash, 64KB SRAM, USB FS, QFN-64","date_code":"","package_case":"QFN-64 (9 x 9 x 0.9 mm, 0.5mm pitch)","in_stock":517,"datasheet":"https:\/\/ww1.microchip.com\/downloads\/en\/DeviceDoc\/doc6175.pdf","price":"$8.18 @ 100+","product_introduction":"The AT91SAM7S256D-MU from Microchip (formerly Atmel) is a 32-bit ARM7TDMI-based microcontroller operating at up to 55 MHz with 27 MIPS throughput. The device integrates 256 KB Flash, 64 KB SRAM, and a rich peripheral set including USB 2.0 full-speed device, two USARTs, SPI, TWI (I2C), SSC, 8-channel 10-bit ADC, 4-channel PWM, and three 16-bit timer\/counters. The Peripheral DMA Controller (PDC) with 11 channels offloads the CPU from data transfer tasks. An internal 1.8V voltage regulator allows the device to operate from a single 3.3V supply, generating the core voltage internally. The -MU suffix indicates QFN-64 package with matte tin finish. This is a well-established industrial MCU with long-term availability.","working_principle":"The AT91SAM7S256D-MU uses the ARM7TDMI core, a 3-stage pipeline (fetch, decode, execute) processor supporting both 32-bit ARM and 16-bit Thumb instruction sets. The Thumb instruction set provides a code-density advantage for applications where Flash memory is a constraint. The 256 KB Flash is organized as 1024 pages of 256 bytes, with a 128-byte write buffer and page erase capability. The 64 KB SRAM is accessible in a single cycle at the maximum clock frequency. The Peripheral DMA Controller (PDC) provides 11 channels that transfer data between peripherals (USART, SPI, SSC, etc.) and memory without CPU intervention, using a linked-list descriptor structure. The USB device controller handles the USB 2.0 FS protocol in hardware, with dedicated endpoint FIFOs. The Advanced Interrupt Controller (AIC) prioritizes and vectors 32 interrupt sources, with 8-level priority and shadow register for fast context switching.","pin_description":"
      Pin Group<\/th>Name<\/th>Type<\/th>Function<\/th><\/tr>
      Multiple<\/td>PA0-PA31<\/td>I\/O<\/td>GPIO with peripheral multiplexing<\/td><\/tr>
      Dedicated<\/td>VDDIO\/VDDCORE<\/td>Power<\/td>I\/O (3.0-3.6V) \/ Core (1.8V internal)<\/td><\/tr>
      Dedicated<\/td>VDDPLL\/VDDFlash<\/td>Power<\/td>PLL and Flash supplies<\/td><\/tr>
      Dedicated<\/td>USB_DP\/DM<\/td>I\/O<\/td>USB data lines<\/td><\/tr>
      Dedicated<\/td>TCK\/TDI\/TDO\/TMS<\/td>I\/O<\/td>JTAG debug interface<\/td><\/tr>
      Dedicated<\/td>NRST<\/td>Input<\/td>System reset (active LOW)<\/td><\/tr><\/table>","application_scenarios":"
      • USB HID keyboard\/mouse device with GPIO and ADC<\/li>
      • Industrial Modbus RTU slave with USART and RS-485 transceiver<\/li>
      • Access control card reader with smart card interface via USART<\/li>
      • Point-of-sale thermal printer controller with USB and SPI<\/li><\/ul>","alternative_models":"
        Manufacturer<\/th>Part Number<\/th>Package<\/th>Notes<\/th><\/tr>
        Microchip<\/td>AT91SAM7S256D-AU<\/td>LQFP-64<\/td>Same device, LQFP package<\/td><\/tr>
        Microchip<\/td>ATSAM4S8B-MU<\/td>QFN-64<\/td>Cortex-M4, 120MHz, upgrade path<\/td><\/tr>
        ST<\/td>STM32F103C8T6<\/td>LQFP-48<\/td>Cortex-M3, 72MHz, USB FS<\/td><\/tr>
        NXP<\/td>LPC2148FBD64<\/td>LQFP-64<\/td>ARM7TDMI, USB, similar class<\/td><\/tr>
        Microchip<\/td>AT91SAM7X256D-MU<\/td>QFN-64<\/td>Same + Ethernet MAC<\/td><\/tr><\/table>"},"_links":{"self":[{"href":"https:\/\/materialparts.com\/es\/wp-json\/wp\/v2\/posts\/6817","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/materialparts.com\/es\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/materialparts.com\/es\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/materialparts.com\/es\/wp-json\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/materialparts.com\/es\/wp-json\/wp\/v2\/comments?post=6817"}],"version-history":[{"count":0,"href":"https:\/\/materialparts.com\/es\/wp-json\/wp\/v2\/posts\/6817\/revisions"}],"wp:attachment":[{"href":"https:\/\/materialparts.com\/es\/wp-json\/wp\/v2\/media?parent=6817"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/materialparts.com\/es\/wp-json\/wp\/v2\/categories?post=6817"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/materialparts.com\/es\/wp-json\/wp\/v2\/tags?post=6817"},{"taxonomy":"chip_brand","embeddable":true,"href":"https:\/\/materialparts.com\/es\/wp-json\/wp\/v2\/chip_brand?post=6817"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}