Unit 3 Synchronous Counters

_____ is the desired future state of flip flop outputs in a synchronous sequential circuit after the next clock pulse is applied

next state

____________ is a counter whose flipflops are all clocked by the same source and thus change in synchronization with each other

synchronous counter

_________ are signals that communicate the present state of a synchronous circuit from its memory section to its control section

Status lines

_____________ is the combinational logic portion of a synchronous circuit that determines the next of the circuit

control

Which counters are faster

Synchronous

What is another name for synchronous counters?

parallel counters

How do you determine the type of edge trigger on a flip flop?

triangle on the clock input

______ is a function that allows simultaneous loading of binary values into all flip flops of a synchronous circuit

parallel load

A four bit binary counter counts from what number to what number

0 to 15

Which type of counter requires more logic

synchronous

Would a 74 LS 163 N chip be considered SSI or MSI

MSI

MSI

medium scale integration

SSI

Small scale integration

________ is the current state of flip flop outputs in a synchronous sequential circuit

present state

A set of flip flops in a synchronous circuit that holds its present state is a___

memory section

___________ is a control function that allows a counter to progress through its count sequence when active and disables the counter when inactive

count enable

Are synchronous counters affected by the ripple effect

No

_______ is a counter whose flip flops are not synchronized to the system clock and therefore, often experience ripple effects

Asynchronous counter

When do counters toggle their outputs

falling edge of clock signal

A counter is a digital circuit that has a number of _____________ whose states progress through a fixed sequence

binary outputs

_________ are signals that connect the control section of a synchronous circuit to its memory section and direct the circuit from its present to its next state

command lines

A ___________ is a counter that can count up or down, depending on the state of a control input

bi-directional counter

All flip flops are simultaneously clocked by a __________

common clock signal

Which type of counter is ideal for simultaneous clocking

synchronous

74 LS 163N chip

up counter (programed for exact #)

74 LS 193N chip

UP/Down counter (One # past)