Lecture 12 Sequential Logic – part 4

Prof. Sin-Min Lee Department of Computer Science

Parallel / Serial Transmission

(a) Parallel transmission uses one connecting line per bit, and all bits are transmitted simultaneously; (b) Serial transmission uses only one signal line, and the individual bits are transmitted serially (one at a time).

Review Questions

• Describe the relative advantages of parallel and serial transmission of binary data.

ans.) Parallel is faster; Serial requires only one signal line

Memory

When an input is applied to a circuit, the output will change its state, but it will remain in the new state even after the input is removed. This property of retaining its response to a momentary input is called memory .

Comparison of nonmemory and memory operation

Digital Computers

Functional diagram of a digital computer

• Type of Computers - microcomputer, minicomputer (workstation), and mainframe.

• Microcomputer - the smallest type of computer - consists of several IC chips; microprocessor, memory, and i/o interface • Microcontroller - a more specialized type of microcomputer - designed to be used as a dedicated or

• Explain how a digital circuit that has memory differs from one that does not.

ans.) One that has memory will have its output changed and remain changed in response to a momentary change in the input signal.

Parallel / Serial Transmission

uses one connecting line per bit, and all bits are transmitted simultaneously; (b) Serial transmission uses only one signal line, and the individual bits are transmitted serially (one at a time).

• Describe the relative advantages of parallel and serial transmission of binary data.

ans.) Parallel is faster; Serial requires only one signal line