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…

Datasheet for the Maxim MAX691 microprocessor supervisory circuit, which combines power-on reset generation, a watchdog timer, battery backup switchover and memory write…

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

Hardware datasheet for the u-blox NEO-6 series GPS modules, document reference GPS.G6-HW-09005 per the file name.

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

Atmel datasheet covering the AT24C32 and AT24C64 serial EEPROMs, 32 Kbit and 64 Kbit two-wire I2C memories.