Questions tagged [asic]
An ASIC is an Application Specific IC. It is a custom chip that is made at the factory.
200
questions
-1
votes
0
answers
40
views
What kind of PLL is typically used for the digital logic in high-frequency ASIC's? [closed]
Want to generate clocks up-to 2GHz from the PLL internal to the ASIC for the critical data-path logic, please advise. Thanks!
Looks like there are wide variety of PLL's, dithered, multiphase, Fs, etc. ...
1
vote
1
answer
635
views
behavior of a pipelined divider
Divider can be made combinational, which uses more logic gates..
Divider can be made sequential, the throughput may stay the same, i.e. use as many stages
as the width of the dividend (assuming width ...
0
votes
1
answer
1k
views
Pseudo dual port RAM in verilog
How does one design a pseudo dual port RAM using a single port RAM in Verilog ? What are the design considerations? Are there frequency limitations ?
Clarification on 'pseudo dual port - single port ...
1
vote
0
answers
67
views
Specific, practical examples of limits of logic gate fan-in?
I've been looking around for discrete, specific, and practical answers to the question "how many inputs can a (N)AND/(N)OR gate have?" as it relates to ASIC/VLSI/MOSFET/semiconductor ...
6
votes
3
answers
227
views
Behaviour of uninitialised RAM in an ASIC
This is a question for anyone with experience designing or with a deep knowledge of volatile memory in an ASIC. E.g. chip designers or silicon process engineers.
We are using the ET1200 EtherCAT ASIC (...
0
votes
1
answer
48
views
Alignment characters in the JESD204B standard
I have a question regarding the alignment characters in the JESD204B data converter interface protocol.
To anyone who is familiar with this protocol. There are certain alignment that are used during ...
0
votes
1
answer
175
views
How to scale output of butterfly unit radix 2 for further stages?
I am designing 8 point FFT by radix 2 using verilog. I am using radix 2 butterfly unit with 8 bits input and so output. I expect to be 8 bit so that I can use this structure again and again for ...
1
vote
2
answers
48
views
How to be sure that the SPICE simulation results are the exact results I will get when I build the circuit (especially an ASIC) in real?
I have been doing circuit simulation in HSPICE for research. The final stage of the research is to build an ASIC. The simulation results are often satisfactory. However, I am still in doubt if the ...
2
votes
2
answers
38
views
The quality of testbenches with UVM testing
This thread partially answers the question that I have Writing synthesizable testbenches, but I'm still not truly satisfied.
So I come from a hardware engineering background, as I was discussing how ...
0
votes
1
answer
204
views
How does assignment work in Verilog?
I am trying to encapsulate my fast adder design with a top module containing input and output registers. All combinational logic is present in the instantiated module. The purpose of top design is to ...
0
votes
1
answer
68
views
What is the need for implementing synthesizable linked list module in RTL?
Curious to understand the use case of designing synthesizable linked list in RTL. This seems to be common in network chip designs.
Given that synthesized hardware has static memory size, what's the ...
1
vote
1
answer
87
views
What does ‘full custom’ really mean?
It’s common in my intro digital logic/VLSI textbooks to see mention of “full custom” chips versus ASIC chips. I’m interested in understanding the difference between the two in the context where both ...
0
votes
1
answer
322
views
SDC Constraints for digitally noise filtered CLOCK and DATA inputs
I need help if my SDC constraints are correct for a digitally noise filtered CLOCK and DATA inputs. I'm not sure if CLK3 grouping and create_clk CLK2 are correct.
I would like to know on how to make a ...
0
votes
1
answer
112
views
Standard cell design flow in an ASIC design flow
I have a question regarding the standard cell design flow in an ASIC design flow.
That being said I understand what a gate array design flow is. It being more or less a fixed logic FPGA. Structured ...
1
vote
1
answer
2k
views
Generate clock jitter in a testbench
How would you generate clock jitter in a testbench?
I have seen these two ways, but I am not sure if they are the best ways:
...