1. ECE 287 – Lecture 13
Memory 2

2. Announcements
Next Quiz on Wednesday after Exam
Exam II – Nov 15th
Last Day to Demo Labs – Nov 14th
Project Oral Proposal - Nov 1st

7. Register
Build a 3 bit storage

8. Register
Build a 3 bit register that only stores when
enabled
Choices…

9. Shift Register
Build a 3 bit shift register that moves values 1
step right.
0,1,1 -> a1, 0, 1

10. Linear Shift Back Feed Register
What does the following do…
What is it good for?

11. Other Registers
•Counters
•ALU register

12. ROM
Build a 2 bit rom that stores:
Address: 0 1 2 3 4 5 6 7
Data:
00, 11, 10, 11, 01, 00, 10, 00

13. RAM
What does is mean?
Static vs. Dynamic?

14. RAM
Build a 2 bit RAM:

15. Problem Set
1. Build a 2 bit RAM…
1.
2.
How many transistors in the circuit?
Show what happens for the following inputs every clock cycle {w0, w1, add0,
add1, r/w}
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{1’b0, 1’b0, 1’b0, 1’b0, 1’b0}
{1’b0, 1’b1, 1’b1, 1’b0, 1’b0}
{1’b1, 1’b0, 1’b0, 1’b1, 1’b0}
{1’b1, 1’b0, 1’b1, 1’b1, 1’b0}
{1’b1, 1’b0, 1’b1, 1’b1, 1’b1}
{1’b0, 1’b0, 1’b0, 1’b0, 1’b1}
{1’b0, 1’b1, 1’b1, 1’b1, 1’b0}
{1’b1, 1’b0, 1’b1, 1’b1, 1’b1}