The document compares microprocessors and microcontrollers. Microprocessors have separate CPU, RAM, ROM, I/O, and timers, while microcontrollers have these components integrated onto a single chip. Microcontrollers are cheaper and use less power and space than microprocessors, making them better suited for applications where these factors are important. The document also describes different timer modes for microcontrollers, including 13-bit, 16-bit, auto-reload, and non-interrupt modes.