Unit 11 Flashcards
Define a multiplexor?
A multiplexor is a circuit that can sleect different data values
What does a control bus (c) do?
The control bus details what data value is to be select
If M = 1001 and D3 = D4 = 1001, then what might C2C1C0 equal?
3 or 4 (011 or 100)
Multiplexors are made up of not gates (flip flashcard).
How many control input lines does a multiplexor usually have?
n control input lines Ci
How many input buses does a multiplexor usually have?
2^n data input busses Di
How many output buses does a multiplexor usually have?
1 data output bus
What is a clock cycle?
The total time taken for a high then low pulse, or a rising edge to another rising edge
What is a register file?
A register file is a collection of registers.
How many bits does a latch store?
1
How many input lines are there in a bit?
3 input lines (2 control, 1 data)
Where is the input of a bit written to?
The latch
What is outputted when RE is enabled?
The latch
