![]() ![]() In the O/P why is $realtime scaled to precision value of 100ns i.e 0.1us ? I expected that the real numbers be rounded to 1 decimal place so parameter d should have been scaled to 15.5us ,ĭelay of #1.1499 be scaled to 11.5us, delay of #1.1551 be scaled to 11. The problems discussed in this article all take 8421BCD code as an example, and 09 in decimal system are represented by 00001001 respectively. Can anybody explain: assign grayvalueibinaryvalueibinaryvaluei+1 I am not able to understand this specific XOR operation for converting to gray code from binary. I then tried a similar code from LRM Section 22.7 with the timescale and timeunit changed :: EDA_LINK BCD code concept BCD code (Binary-Coded Decimal), uses four binary digits to store a decimal number, as shown in the table below. This binary to gray conversion code is an example from a book. (b) For `timescale 10 us / 100 ns, as 100ns is 0.1 us would the real numbers be rounded to 1 decimal place ?ĭoes the value specified in the timeunit and timeprecision i.e 10 and 100 in (b) contribute to how many decimal place the real number gets rounded to ? As 1ps is 0.001ns delays are rounded to 3 decimal places. ![]() (a) For `timescale 1 ns / 1 ps, Delays are rounded to real numbers with three decimal places-or precise to within one thousandth of a nanosecond-because the time_precision argument is “1 ps,” or one thousandth of a nanosecond. ![]() I have doubt related to " Delays are rounded to real numbers with n decimal places " LRM Section 22.7 :: " The time_precision argument specifies how delay values are rounded before being used in simulation " The individual segments are listed in the table below. They simply use a Look-Up Table to do the decoding from the hexadecimal input to the 7-segment output. Both the VHDL and Verilog code work the same way. My recent threads have made me realize that I need to brush-up concepts of timeunit and timeprecision. This allows for the decimal numbers 0-9 and the Hex Characters A-F to be displayed to the user. ![]()
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