ECE 287 – Lecture 13

Memory 2

Announcements

Next Quiz on Wednesday after ExamExam II – Nov 15th

Last Day to Demo Labs – Nov 14th

Project Oral Proposal - Nov 1st

Register

Build a 3 bit storage

Register

Build a 3 bit register that only stores when enabled

Choices…

Shift Register

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

Linear Shift Back Feed Register

What does the following do…

What is it good for?

Other Registers

•Counters•ALU register

ROM

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

RAM

What does is mean?

Static vs. Dynamic?

RAM

Build a 2 bit RAM:

Problem Set

1. Build a 2 bit RAM…1. How many transistors in the circuit?2. Show what happens for the following inputs every clock cycle {w0, w1, add0,

add1, r/w}• {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}