Bus Systems Flashcards
The basic bus system block diagram is comprised of what four parts?
Microprocessor (CPU/controller), System Memory, and System Input/Output.
A bus line is a conductor or conductive solder path that connects ______.
A bus line is a conductor or conductive solder path that connects multiple components, functions, or systems.
The ____ bus transmits and receives bytes of data and instructions. The word size (8-bit, 16-bit, 32-bit, etc.) determines the number of conductors required. An 8-bit data bus requires 8 parallel lines.
Data bus
The ____ bus is bi-directional and carries information to and from system components. Direction of data flow is determined by the control signals generated in the microprocessor.
Data bus
The CPU selects a path on the _____ bus using control signals. The information requested is transmitted to or from the CPU on the data bus.
Address Bus
The size of the address bus is determined by the ______ of the total system.
The size of the address bus is determined by the memory capacity of the total system. For example, a 64 K memory would require 16 separate address lines.
The ____ bus is unidirectional. It carries the synchronization and enable signals necessary to allow flow of information.
Control Bus
The ____ bus carries information describing what operation is to be performed, and which units are to respond. Signals include timing, memory read/write, and I/O read/write.
Control Bus
System components utilizing buses avoid massive interference by the application of ____, and _____. The CPU/controller contains the ____ for precise timing of the system.
System components utilizing buses avoid massive interference by the application of gates, and precise timing. The CPU/controller contains the clock for precise timing of the system.
Each component is connected to each bus wire through a gating network which consists of hundreds of _____ gates.
AND gates.
One input of each gate connects to a specific bus line, the second to a timing source, and the third to the control section. The information on the bus line is passed only when its AND gate is ______.
enabled.
System Memory
Memory is divided into three types; ____ (ROM), _____ (RAM), and ______ .
System Memory
Memory is divided into three types; read-only memory (ROM), random-access memory (RAM), and single word locations (registers).
_____contains the necessary steps required to sequence the CPU through initialization. This is permanent memory and does not change or erase when power is removed.
ROM contains the necessary steps required to sequence the CPU through initialization. ROM is permanent memory and does not change or erase when power is removed.
This memory may be manipulated under program control. The data in this memory is lost when power is removed.
(RAM) random access memory
RAM and ROM are housed in arrays of storage cells. These may be accessed by the CPU in groups of eight cells (8-bit bytes) called ______.
RAM and ROM are housed in arrays of storage cells. These may be accessed by the CPU in groups of eight cells (8-bit bytes) called addresses.
The ______ determines whether to decode (READ) or store (WRITE) the information at the accessed location.
The CPU/controller determines whether to decode (READ) or store (WRITE) the information at the accessed location.
What type of memory is inside the microprocessor and is provided for information manipulation? It also provides temporary storage of information.
Single word memory (registers)
The ______ contains all the functional sections found in a conventional general-purpose computer. It contains the control section that determines data flow in a bus system.
Microprocessor (CPU/Controller)
The _____ section interfaces external sources to the system bus. Keyboards, monitors, disk-drives, hard-drives, and printers interface with the control section via the I/O section.
input/output section
Address Bus
What memory is considered permanent and contains the initialization instructions?
ROM