Class Notes (808,753)
Canada (493,377)
CSC258H1 (46)


1 Page
Unlock Document

University of Toronto St. George
Computer Science
Steve Engels

SEQUENTIAL CIRUCITS  Latches  Something to consider o If multiple gates of these types are combined, you can get more o Computer specs us terms like “8GB of Ram” and “2.2GHz steady behavior processors”. o These circuits are called latches ̅̅  RAM = Random Access Memory; 8GB = 8 Billion ints o Latch, behavior:  2.2 GHz = 2.2 billion clock pulses per second  Assume that ̅ and ̅ at start ̅ ̅  1 hertz = 1 operation per second  The input sets the output to 1 which sets the output o What does this mean in circuity? to 0  How do you use circuits to store values? ̅  Setting keeps the output at 1, which maintains  What is the purpo both output values  se of a clock signal?  Currently a particular input cause particular output o Consider a same input has 3 different outputs –ex. Tickle Me Elmo  Two kinds of circuits o Combinational Cirucits (past material)  Circuits where the output values are entirely dependent and predictable from the input values o Sequential Circuit (new)  Circuits that depend on both the inputs and the previous state of the circuit  Sequential circuits  Assume that ̅ and ̅ at start, and then set to 0 ̅ o This creates circuits whose internal state can change over time  This sets output to 1, which sets the output to 0  the same input values can result in different outputs  Setting ̅ keeps the output value ̅ at 0 which o Purpose: memory values, react to changing inputs maintains both output values  Creating Sequential circuits o Essentially, sequential circuits are a result of having feedback in the circuit  Note how the circuit remembers its signal going from 10 or 01 to 11 o Some gates don’t have useful results when outputs are fed back on inputs ̅ ̅ 0 0 X X 1 1 A Q T Q T+1 0 1 X X 1 0 0
More Less

Related notes for CSC258H1

Log In


Don't have an account?

Join OneClass

Access over 10 million pages of study
documents for 1.3 million courses.

Sign up

Join to view


By registering, I agree to the Terms and Privacy Policies
Already have an account?
Just a few more details

So we can recommend you notes for your school.

Reset Password

Please enter below the email address you registered with and we will send you a link to reset your password.

Add your courses

Get notes from the top students in your class.