Tagged Questions

0
votes
2answers
191 views

Number of bits for tag, index, and block in a direct-mapped cache

Suppose you have a 64-byte cache on a system with 16-bit memory addresses. If the cache is direct-mapped and it has 10 bytes of tag overhead in total, how many bits are used for the tag, index, and ...
2
votes
1answer
236 views

XOR gate; transistor level design [duplicate]

What would a transistor level design of an XOR gate look like?
2
votes
3answers
208 views

Why does active low even exist?

In my career I've often encountered signals that are active low (Reset being the most common). I've even seen interfaces where all control signals are actively low. To me, this is very unintuitive ...
1
vote
2answers
114 views

Pullup or direct drive when handling active low inputs/resets?

Active-low reset inputs seem to be a holdover from TTL logic where the falling edge was faster than the rising edge, so the falling edge was decided as more important to increase the maximum possible ...
1
vote
1answer
130 views

Is this boolean expression reducible?

I have this boolean expression: F1 = a1'a2' + a1a2'. Could it be reduced even more?
0
votes
1answer
254 views

Designing State Diagram for a 2 input sequence detector

For a lab exercise I have to design a 2-input sequence and Im struggling with the state diagram, as It has 2 inputs, i've designed it with one input before. the sequence to be detected is 1032 which ...
-1
votes
2answers
112 views

Is it possible to combine JK, SR and D filp flops in one circuit… and why?

I am taking a logic design class and the teacher asked this question. I know I can use whatever I want in one circuit, I mean using JK then use SR in another part, but if I was to design a sequential ...
-1
votes
1answer
175 views

Karnaugh Mapping Assignment [closed]

Design a combinational circuit with 3 inputs x, y and z and 3 outputs A, B, and C. When the binary input is 0, 1, 2, or 3. The binary output is one greater than the input. When the binary input is 4, ...
-2
votes
1answer
1k views

Suggestions for Digital Logic Design laboratory projects ? [closed]

What are some simple Digital Design projects that I can make using basic IC's in the laboratory like Logic gates, Counters, registers, mux/demux ... etc?
2
votes
1answer
255 views

Need help with RTL (Register Transfer Level) circuit implementation - Euclidian GCD algorithm

I'm looking for help regarding the following algorithm and implementing the logic circuit. Here it is in pseudocode: ...
1
vote
3answers
104 views

single cycle implementation with single memory

I've read that implementing a single cycle cpu requires two memories one for data and one for instructions. Why is this? Using a single memory with two read ports (see figure below) wouldn't it be ...
0
votes
1answer
130 views

single-cycle design using and shared memory for both data and instruction

This is not really a question on electronics , it's more a question on logical design. I hope this is the right place to ask. How come it is not possible two use a single-cycle design and have a ...
4
votes
4answers
856 views

Is there a more optimized way of making an incrementer than a full adder?

I'm designing a very simplistic microprocessor as a project to help learn VHDL. So I'm needing something to increment the 8 bit program counter. I will need to increment it by two. Is there a better ...
0
votes
1answer
97 views

manipulation on clock output

I have : four outputs : a, b, c, d ( four output pins ) Assume I have one insect, let us say it jumps one step at a time and I can control its direction. If ...
4
votes
4answers
606 views

What precautions should I take when mixing analog audio and digital on the same board?

What precautions should I take when mixing analog audio and digital (uC control) on the same board? I don't want to hear the I2C bus in my speakers. I'm thinking about Separate power supplies ...