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The Designer's Guide Community Forum › Design Languages › Verilog-AMS › Question Listing 19 Chapter 4 Bidirectional Connect Module

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Question Listing 19 Chapter 4 Bidirectional Connect Module (Read 3878 times)

Marcelo Baru New Member Offline Posts: 7	Question Listing 19 Chapter 4 Bidirectional Connect Module Oct 27^th, 2011, 5:01pm Hello, Can someone explain me the line: always @ (vstate or istate or d) begin case (vstate) .... I am not sure I fully understand vstate or istate or d. vstate is an integer. I hope to have more luck than with me skin effect question. Thanks, Marcelo
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Ken Kundert Global Moderator Offline Posts: 2386 Silicon Valley	Re: Question Listing 19 Chapter 4 Bidirectional Connect Module Reply #1 - Oct 27^th, 2011, 5:11pm You are in luck. The '@(vstate or istate or d)" triggers if there are any events (i.e. changes in) vstate, istate, or d. Thus, whenever one of those variables changes, the case statement is re-evaluated. -Ken
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Marcelo Baru New Member Offline Posts: 7	Re: Question Listing 19 Chapter 4 Bidirectional Connect Module Reply #2 - Oct 28^th, 2011, 1:24pm Many thanks Ken. You confirmed my thought. I wish there was a better explanation of the OR operation. Cheers, Marcelo
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Marcelo Baru New Member Offline Posts: 7	Re: Question Listing 19 Chapter 4 Bidirectional Connect Module Reply #3 - Oct 28^th, 2011, 1:34pm Ken, In the same listing, shouldn't always @(above(V(a)-vl, 1)) inXrange =1; be a cross function? Or the 1 removed? The posedge condition is checked below. BTW is there a link to submit errata info for the book?. Thanks, Marcelo
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Ken Kundert Global Moderator Offline Posts: 2386 Silicon Valley	Re: Question Listing 19 Chapter 4 Bidirectional Connect Module Reply #4 - Oct 28^th, 2011, 6:58pm Marcelo, Yes, you should delete the 1 in @(above(V(a)-vl, 1)). Thanks for the comments on the book, I have recorded them so when I do the second edition I will resolve them. If you have any further comments or want to point out errors, just send them to me. -Ken
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Marcelo Baru New Member Offline Posts: 7	Re: Question Listing 19 Chapter 4 Bidirectional Connect Module Reply #5 - Oct 28^th, 2011, 10:07pm Great Ken. I will collect them once I finish reading the book and I will let you know. Best, Marcelo
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