(1) for CASE 2 and CASE 3, how can clock_time begin from 0? It is already 2nd block. (2) If some call generate valid clock_time, some not, that means DLL has to track the information like block number to decide from which block begin return clock time. (3) DLL can always return clock time even CDR is in lock-in stage, it is the EDA tool that Specified after how many UI or block, to make use of clock_time. From: ibis-macro-bounce@xxxxxxxxxxxxx [mailto:ibis-macro-bounce@xxxxxxxxxxxxx] On Behalf Of Dmitriev-Zdorov, Vladimir Sent: Friday, March 26, 2010 2:08 PM To: ibis-macro@xxxxxxxxxxxxx Subject: [ibis-macro] Re: FW: Question on clock_times Please clarify if the following clock time patterns are legitimate when performing several GetWave calls (for simplicity/brevity, let's assume that we have only 10 bits per call and will use integers instead of small double values). Which of the following 3 cases are allowed? CASE 1: After the 1-st call: 0 1 2 3 4 5 6 7 8 9 -1 After the 2-nd call: 10 11 12 13 14 15 16 17 18 19 -1 After the 3-rd call: 20 21 22 23 24 25 26 27 28 29 -1 etc. CASE 2: After the 1-st call: -1 # # # # # # # # # # // First call does not generate clocks After the 2-nd call: 0 1 2 3 4 5 6 7 8 9 -1 After the 3-rd call: 10 11 12 13 14 15 16 17 18 19 -1 // time increment continued from the last call etc. CASE 3: After the 1-st call: -1 # # # # # # # # # # After the 2-nd call: 0 1 2 3 4 5 6 7 8 9 -1 After the 3-rd call: 0 1 2 3 4 5 6 7 8 9 -1 // i.e. always start from zero etc. -----Original Message----- From: ibis-macro-bounce@xxxxxxxxxxxxx [mailto:ibis-macro-bounce@xxxxxxxxxxxxx] On Behalf Of Muranyi, Arpad Sent: Friday, March 26, 2010 2:38 PM To: ibis-macro@xxxxxxxxxxxxx Subject: [ibis-macro] FW: Question on clock_times Kumar, So are you saying that the vector can begin with a bunch of -1 and then have valid number later in the vector? Lie this: -1 -1 -1 -1 # # # # # # # # -1 -1 -1 -1 If this is true, is it also true that you can have alternating -1 and good values in the vector? Like this? -1 -1 -1 -1 # # # # # # # # -1 -1 -1 -1 -1 -1 -1 -1 # # # # # # # # -1 -1 -1 -1 Arpad ============================================== ________________________________ From: C. Kumar [mailto:kumarchi@xxxxxxxxx] Sent: Friday, March 26, 2010 3:29 PM To: Muranyi, Arpad Subject: Re: [ibis-macro] Question on clock_times arpad: let me take shot at this 1. Yes -1 indicates end of clock vector 2. clock vector is the clocks associated with the particular wave vector in the particular getwave call. 3. some models can have delayed start for returning a clock vector. Once a legitimate clock vector is returned , the eda tool is expected to use that information to sample the wave returned by the getwave call. Other wise the eda tool may rely on its own devices to sample the wave, (usually this is an 'ideal' clock) 4. some models may modify the wave form but may never return a clock vector. (i.e -1 in the first position) ________________________________ From: "Muranyi, Arpad" <Arpad_Muranyi@xxxxxxxxxx> To: ibis-macro@xxxxxxxxxxxxx Sent: Fri, March 26, 2010 4:08:16 PM Subject: [ibis-macro] Question on clock_times Hello AMI experts, I would like to ask a question about the clock_times vector. The spec says that "The last clock in indicated by putting a value of -1 at the and of clocks for the current wave sample". We got a DLL from a vendor which seems to fill the vector for the first few GetWave calls with -1 and then it starts filling it with good numbers. What is the interpretation of the specification? First, does the above text refer to the entire vector, or each little section independently that a single GetWave call returns? If it is for the entire vector, then having -1 in the first few thousand locations would mean that everything else after that is garbage, correct? If it is per GetWave call, is the EDA tool expected to assemble something from bits and pieces that are returned by the various GetWave calls? Thanks, Arpad =============================================================== --------------------------------------------------------------------- IBIS Macro website : http://www.eda.org/pub/ibis/macromodel_wip/ IBIS Macro reflector: //www.freelists.org/list/ibis-macro To unsubscribe send an email: To: ibis-macro-request@xxxxxxxxxxxxx<mailto:ibis-macro-request@xxxxxxxxxxxxx> Subject: unsubscribe