Memory

#TODO i missed half of it
#TODO Truth tables

Shift Registers (Serial IN $\to$ Serial OUT)

Shift Register.png
FF = Flip Flop

Serial IN $\to$ Parallel OUT (SIPO)

SIPO Diagram.png

Parallel IN $\to$ Serial OUT

PISO Diagram.png
Shift/Load alternates signal
Parallel input is ‘moved’ along the bottom and ‘squeezed’ out of the output in serial

Counter

Can do three things

Increment by 1
Set to a specific value
Reset
(Think Program Counter)
(Why are we count 1-2-4-3)

$D_{0} = \neg Q_{0}$ (because its the 1 bit)
$D_{1} = (Q_{0} \land \neg Q_{1}) \lor (\neg Q_{0} \land Q_{1})$
$D_{2} = (\neg Q_{1} \land Q_{2}) \lor (\neg Q_{0} \land Q_{2}) \lor (Q_{0} \land Q_{1} \land \neg Q_{2})$
$= ((\neg Q_{0} \lor \neg Q_{1}) \land Q_{2}) \lor (Q_{0} \land Q_{1} \land \neg Q_{2})$
$D_{3} = ((\neg Q_{0} \lor \neg Q_{1} \lor \neg Q_{2}) \land Q_{2}) \lor (Q_{0} \land Q_{1} \land Q_{2} \land \neg Q_{3})$
!Counter Diagram?.png
wtf is going on

Connected Pages

Depth

Pages mentioning this page

Homer