1. Seven Segment Display Driver:
(a) Write
the Truth Tables for any 2 segments of a 7 segment
display when used to display all the Hex numbers.
(b) Transfer
the Truth tables to Karnaugh maps and derive a
minimal Sum of Products expression for each segment.
(c) Draw circuit
diagrams for the SOP expressions USING ONLY
NAND GATES.
(d) From the
original truth tables shown in part (a) derive
implementations for the two segments using an 8 input
multiplexor for each segment.
(e) Implement
both the SOP expressions in (c) and the multiplexor
circuits in (d) using LogicWorks.
(f) Test your
circuit by using all 16 possible inputs ( 0 - F ) and
turn in both the circuits and timing diagrams. You will
find it
easiest if you use the 4 bit input.
2. Master-Slave JK Flip-Flop
Modify the circuit diagram for the Master Slave (MS) JK Flip-flop
(FF) in Figure A.61 in your text AS CORRECTED IN CLASS to
incorporate a Preset Input. Preset is independent of the
clocks.
When Preset is one it causes both Q of the master and Q of the
slave to be set to 1. Most FF's also have a CLEAR input,
which
causes both Q of the Master and Q of the slave to go to zero
when Clear is 1. Label J, K, Clock, Preset, Qm, Q'm, Qs,
and Q's. Use LogicWorks to implement
the circuit and verify that all of
the inputs work correctly. Submit both the circuit diagram
and
timing diagram produced by LogicWorks.