Datasheet for the legacy ATmega163 AVR microcontroller, a 2.15 MB PDF file. It documents the pin layout, memory organisation, timers, ADC, serial interfaces, programming…

Complete datasheet for the ATmega165 AVR microcontroller, a 3.15 MB PDF. The document covers the pinout, memory, clock system, timers, USI, USART, ADC, JTAG, fuse bits…

Datasheet for the classic Microchip PIC16C84, an early 18-pin microcontroller with electrically erasable program memory, delivered as a 961 KB PDF.

Atmel datasheet for the AT89S53, an 8051-compatible microcontroller with 12 KB of in-system programmable flash and SPI serial programming.

Datasheet PDF for the SED1330, around 388 KB, an Epson LCD controller from the same family as the SED1335.

Datasheet for the PD064VT2 TFT display panel, 313 KB in PDF, with the 064 code pointing to a 6.4 inch class screen. The name gives no revision or version.