Datasheet for the Atmel ATxmega256A3B, a specific AVR XMEGA microcontroller with 256 KB of flash in a 64-pin package.

Microchip datasheet for the dsPIC30F4013 digital signal controller, a 16-bit device combining a microcontroller with DSP capabilities, in a 5.22 MB PDF.

Microchip datasheet in PDF format, 2.87 MB, for the PIC16F872 flash microcontroller, a 28-pin member of the PIC16F87x line.

Datasheet for the older ATmega161 AVR microcontroller, a 1.65 MB PDF document. It details pin functions, the memory map, peripherals such as timers and UARTs…

PDF datasheet, 2.54 MB, for the Microchip PIC16F72 flash microcontroller with an 8-bit ADC and capture, compare and PWM module.