Datasheet for the ATmega128A AVR microcontroller, a 2.68 MB PDF. The A suffix denotes the revised version of the ATmega128, and the document covers its 64-pin pinout…

Datasheet in PDF form for the Atmel ATmega323, an older 8-bit AVR microcontroller with in-system programmable flash, EEPROM, SRAM and JTAG interface.

Full datasheet for the Atmel ATmega8 8-bit AVR microcontroller, supplied as a 2.17 MB PDF.

Short summary datasheet for the ATmega128 AVR microcontroller, 235 KB in PDF format. It generally contains the feature overview, 64-pin package pinout, pin descriptions…

Datasheet for the Microchip ENC28J60, a stand-alone 10Base-T Ethernet controller with an SPI interface, as a 480 KB PDF.

Summary edition of the ATmega8515 AVR microcontroller datasheet, a 182 KB PDF. It usually lists core features, pin configurations for each package, pin descriptions and…

Atmel datasheet for the AT89C4051, a compact 20-pin 8051-compatible microcontroller with 4 KB of flash and an onboard analog comparator.

PDF datasheet for the Atmel AT89C1051, the smallest member of the 20-pin 8051-compatible family, offering 1 KB of flash, 64 bytes of RAM and an analog comparator.

Application note about the 8051 microcontroller architecture, stored as a 319 KB PDF without any vendor named in the title.

Complete datasheet for the Atmel ATmega128, a 64-pin 8-bit AVR microcontroller with 128 KB of flash, EEPROM, SRAM, two USARTs and JTAG.