cadence schematics software (orcad) hierarchical schematics and bit numbers

Based on the 16.6 version.
Learning software to use, improve work efficiency.

A bottom-up hierarchical schematic design

Bottom-up hierarchical schematic design stamp on the link below, feel it is quite clear and understandable. We look to reprint
bottom-up hierarchical schematic design

Second, the number of bits set

2.1 digit numbers marked in accordance with the page

If the tag number through which can be seen directly in the schematic page of the material, the more pages for schematics, no doubt it is more convenient.
The following will show you that if labeling for bit number by the number of pages.

The following is a folder, two schematic diagram symbol to demonstrate the use.

1. Pull out the default symbol will automatically label. As shown below
   
   
2. We first grade reset, the role of the red box to
   [1] operate on all pages
   [2] to operate the selected page (if you only want to operate on the part of the schematic can be achieved by this one)
   
   here we have to reset all the pages, after resetting the following results:
   
3. We next configuration parameters, the bit number range is 100-199 page1, page2 bit number range is 200-299, operation is as follows.
   
4. After configuring ok, the following results:
   
   

This realization according to the schematic symbol bit number of pages automatic annotation of the function.

Tag Tagging 2.2 hierarchical schematics

Level schematic diagram generally there are multiple sub-folders, see chapter established method, where a presentation by a child diagram, the establishment of good works as follows:

Since the core is generally within the page is well in advance, PAGE 1 and CORE pages duplicate useful bit number may be the case.
In this case, the global reset and by renumbering way to solve the problem of duplicate tag number. But this will all upset No. situ. So for the same time in terms of PCB LAYOUT very friendly, lead to changes in the bit number can not reuse the original layout.

At this point you can choose to separate the newly designed pages rearranged bit number, tag reuse the same page.

Another method, the bit number is performed by the arrangement Occurrences.

instance
. n-instance; situation; recommendations

occurrence
. the n-happen; occur; events; found

instance attribute member represents the public, indicating that like elements;
and occurrence represents one example, it is represented by a member, a member corresponding to an occurrence, a occurrence represents a proprietary element attributes.

My personal understanding is: the bit number, for example, occurrence of the value of the final presentation to the bit number netlist, is absolute and can not be duplicated.

Bits and instance number is a relative value, with a project, if occurrence of bit numbers using the label, the element instance number bits can be repeated, but the corresponding occurrence values are absolutely non-repeating.

Sometimes we point to open a component of property, there will be white and yellow two properties, which are yellow column attribute occurrence, white column instance property. As shown below

We can see from the figure, instance is the bit number U1, occurrence of a bit number U1, it can now be understood that the element is the bit number U1.

If the call is repeated twice, then the occurrence of the corresponding elements will be two, as shown below:

so afraid bit number to repeat. And your newly added element of time, do not be afraid digit number repeated, because it is the default number of bits **? ** After waiting for you design, making a number of bits are arranged to configure according to the following figure, you can, do not worry about the original bit number can be changed.

If you get someone else's schematics, but you do not need another level schematics, when you want to get rid of occurrence attribute how to do it? May be achieved by:

If the design is a flat schematic formula suggested by the above method for operating it, and then to perform bit numbers arranged by way instance.

If you continue to use the occurrence be arranged is no problem, output netlist subject to the occurrence of the final properties.

Then use the occurrence perform hierarchical schematic design when exporting bom and browse the time, you should select the corresponding occurrence and the following diagram

browse

export BOM time

III Summary

Above it describes several methods for software used to improve the efficiency of simple terms is mainly the following points

1. Up from low-level design schematics
2. Carried out in accordance with the principles of the bit number of page tagging
3. orcad difference between the instance and occurrence properties and how to use them for bit numbering.

Hope it could help everyone.