CN102867100A - Printed board computer aided design (CAD) layout method - Google Patents
Printed board computer aided design (CAD) layout method Download PDFInfo
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- CN102867100A CN102867100A CN2012103800565A CN201210380056A CN102867100A CN 102867100 A CN102867100 A CN 102867100A CN 2012103800565 A CN2012103800565 A CN 2012103800565A CN 201210380056 A CN201210380056 A CN 201210380056A CN 102867100 A CN102867100 A CN 102867100A
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Abstract
The invention provides a printed board computer aided design (CAD) layout method. The printed board CAD layout method comprises the steps of 1 building a board frame of a printed board to be laid out and loading a wire mesh of the printed board to be laid out; 2 performing layout analysis to the printed board to be laid out so as to divide functional modules of the printed board to be laid out and divide printed board to be laid out into a plurality of functional modules according to the layout; 3 judging whether same functional modules exist in the plurality of functional modules or not, wherein the 4th step is carried out if a judged result in the 3th step is definite; 4 building a multiplex module prototype for the same functional modules, wherein the layout of a single same functional module is achieved in the printed board through the multiplex module prototype, and the 5th step is carried out after the 4th step; and 5 utilizing the multiplex module prototype as a local layout structure of the same functional modules and laying out the printed board to be laid out.
Description
Technical field
The present invention relates to the printed board engineering design field, more particularly, the present invention relates to a kind of printed board CAD layout method.
Background technology
Along with the progress of chip technology, semiconductor technology is tending towards physics limit, has reached the deep-submicron level, and ultra-large circuit becomes the chip Developing mainstream.The CAD(Computer Aided Design of printed plate, computer-aided design (CAD)) design has been subject to very large impact, the most obvious abundant species that variation is chip package, such as BGA(Ball GridArray, BGA Package), PGA(pin grid array, the stitch Background Grid array packages), TQFP(thin quad flat package, four jiaos of flat package of thin plastic packaging) etc. encapsulated type; Secondly, high-density pin encapsulation (packaging pin is several more than 1000) and small-sized encapsulated become a kind of trend.
Because the high-density pin small-sized encapsulated brings the layout resource nervous, simultaneously, because the raising of system clock frequency, cause sequential and problems of Signal Integrity, in the face of complicated high-performance printed board, in the face of the pressure that the research and development of products cycle shortens, printed board how to design at short notice high-performance, high reliability becomes important step in the electronic chain.
On a large scale, in the high performance circuit of ultra-large integrated device design many terminal networks are arranged; a large amount of terminating resistors and filter capacitor; if the device package number of pins is more than 1000, it is individual that the discrete device of its interlock circuit has hundreds of usually, need to take a long time during the CAD design and carry out layout.Topology file is derived, the input coordinate file carries out similar device layout if adopt, and then the name of device is needed the regular one by one correspondence of following, need, and this has more requirement for the front end logic designer, and complicated operation.
Therefore, hope can provide a kind of printed board CAD layout method that can shorten design time at the CAD layout stage, improve design efficiency.
Summary of the invention
Technical matters to be solved by this invention is for having defects in the prior art, a kind of printed board CAD layout method that can shorten design time at the CAD layout stage, improve design efficiency being provided.
In order to solve the problems of the technologies described above, according to a first aspect of the invention, provide a kind of printed board CAD layout method, it comprises:
First step: set up the sheet frame for the treatment of the layout printed board, and load the gauze for the treatment of the layout printed board;
Second step: treat the layout printed board and carry out topological analysis, carry out the functional module division in order to treat the layout printed board, thereby the layout that will treat the layout printed board is divided into a plurality of functional modules;
Third step: judge whether there is the identical function module in a plurality of functional modules;
Under the result of determination of third step was sure situation, carry out the 4th step: set up the Multiplexing module prototype for described identical function module, wherein, described Multiplexing module prototype had realized single identical function layout of the module in printed board;
After the 4th step, carry out the 5th step: by utilizing described Multiplexing module prototype as the local layout structure of described identical function module, treat the layout printed board and carry out layout.
Preferably, described Multiplexing module prototype comprises master chip, one or more discrete device and the structure that represents all annexations of described master chip and described one or more discrete devices.
Preferably, the identical function module is logic function and usage identical functional module all.
According to a second aspect of the invention, provide a kind of printed board CAD layout method, it comprises:
Initial step: set up one or more Multiplexing module prototypes;
First step: set up the sheet frame for the treatment of the layout printed board, and load the gauze for the treatment of the layout printed board;
Second step: treat the layout printed board and carry out topological analysis, carry out the functional module division in order to treat the layout printed board, thereby the layout that will treat the layout printed board is divided into a plurality of functional modules;
Third step: judge whether there be the functional module identical with Multiplexing module prototype function in a plurality of functional modules;
Under the result of determination of third step is sure situation, carry out the 4th step: by utilizing described Multiplexing module prototype as the local layout structure of the functional module identical with Multiplexing module prototype function, treat the layout printed board and carry out layout.
Preferably, described Multiplexing module prototype comprises master chip, one or more discrete device and the structure that represents all annexations of described master chip and described one or more discrete devices.
Preferably, the result of determination of third step is that sure situation refers in a plurality of functional modules and to exist and Multiplexing module prototype logic function and usage identical functional module all.
According to a third aspect of the invention we, provide a kind of printed board CAD layout method, it comprises:
Initial step: set up one or more Multiplexing module prototypes;
First step: set up the sheet frame for the treatment of the layout printed board, and load the gauze for the treatment of the layout printed board;
Second step: treat the layout printed board and carry out topological analysis, carry out the functional module division in order to treat the layout printed board, thereby the layout that will treat the layout printed board is divided into a plurality of functional modules;
Third step: judge whether there is the identical function module in a plurality of functional modules;
Under the result of determination of third step was sure situation, carry out the 4th step: set up the Multiplexing module prototype for described identical function module, wherein, described Multiplexing module prototype had realized single identical function layout of the module in printed board;
After the 4th step, carry out the 5th step: by utilizing described Multiplexing module prototype as the local layout structure of described identical function module, treat the layout printed board and carry out layout;
In addition, the result of determination of third step for the situation of negating under, carry out the 6th step: judge whether there be the functional module identical with Multiplexing module prototype function in a plurality of functional modules;
Under the result of determination of the 6th step is sure situation, carry out the 7th step: by utilizing described Multiplexing module prototype as the local layout structure of the functional module identical with Multiplexing module prototype function, treat the layout printed board and carry out layout.
Preferably, described Multiplexing module prototype comprises master chip, one or more discrete device and the structure that represents all annexations of described master chip and described one or more discrete devices.
Preferably, the identical function module is logic function and usage identical functional module all.
Preferably, the result of determination of third step is that sure situation refers in a plurality of functional modules and to exist and Multiplexing module prototype logic function and usage identical functional module all.
In printed board CAD layout method of the present invention, carried out the design of the Multiplexing module of printed board CAD, after this in a kind of printed board, during multiplexing this Multiplexing module, be not subjected to the restriction of device name; Between different printed boards, during multiplexing this Multiplexing module, be not subjected to the restriction of device name yet, improved the CAD positioning efficiency.Thus, in the printed board CAD of embodiment of the invention layout method, can carry out fast layout to printed board, and, because layout is multiplexing, corresponding CAD subsequent design, for example the lead-in wire fan-out is coiled on the surface, chip locally supplied power source is cut apart also can be multiplexing, improves printed board CAD design efficiency, and similar modular blocks is many, multiplexing number is many, and efficient is more obvious.
Description of drawings
By reference to the accompanying drawings, and by with reference to following detailed description, will more easily to the present invention more complete understanding be arranged and more easily understand its advantage of following and feature, wherein:
Fig. 1 schematically shows the overview flow chart according to the printed board CAD layout method of first embodiment of the invention.
Fig. 2 schematically shows the overview flow chart according to the printed board CAD layout method of second embodiment of the invention.
Fig. 3 schematically shows the overview flow chart according to the printed board CAD layout method of third embodiment of the invention.
Fig. 4 schematically shows Multiplexing module prototype that the printed board CAD layout method according to the embodiment of the invention adopts and the schematic diagram of multiplex mode thereof.
Need to prove, accompanying drawing is used for explanation the present invention, and unrestricted the present invention.Note, the accompanying drawing of expression structure may not be to draw in proportion.And in the accompanying drawing, identical or similar element indicates identical or similar label.
Embodiment
In order to make content of the present invention more clear and understandable, below in conjunction with specific embodiments and the drawings content of the present invention is described in detail.
The inventor advantageously finds, if a plurality of chips that the circuit subsistence logic function in the printed board and usage are the same, then can adopt layout and the fan-out structure of the combination of a master chip and relevant discrete device, generate the Multiplexing module prototype, like this, remaining chip and this Multiplexing module prototype of corresponding discrete device reusable are carried out fast layout, fan-out thus.Like this, can shorten design time at the CAD layout stage, and improve the efficient of printed board CAD layout.
The＜the first embodiment 〉
Fig. 1 schematically shows the overview flow chart according to the printed board CAD layout method of first embodiment of the invention.
As shown in Figure 1, the printed board CAD layout method according to first embodiment of the invention comprises:
First step S1: set up the sheet frame for the treatment of the layout printed board, and load the gauze for the treatment of the layout printed board;
Second step S2: treat the layout printed board and carry out topological analysis, carry out the functional module division in order to treat the layout printed board, thereby the layout that will treat the layout printed board is divided into a plurality of functional modules;
Third step S3: judge whether there is the identical function module in a plurality of functional modules; For example, preferably, the identical function module is logic function and usage identical functional module all;
The result of determination of third step S3 be in the sure situation (specifically, for example, subsistence logic function and usage identical identical function module all in a plurality of functional modules), carry out the 4th step S4: set up the Multiplexing module prototype for described identical function module, wherein, described Multiplexing module prototype has realized single identical function layout of the module in printed board; More particularly, can set up the Multiplexing module prototype by following manner: at first select the some devices as the module prototype, next selects the initial point of this module prototype reference (can be the symbol initial point of certain device in this prototype, can be certain pin etc. of certain device in this prototype), then key in the filename of a module prototype, newly-generated file is the Multiplexing module prototype.
After the 4th step S4, carry out the 5th step S5: by utilizing described Multiplexing module prototype as the local layout structure of described identical function module, treat the layout printed board and carry out layout.Specifically, can use the Multiplexing module prototype by following manner: selection function, some devices for the treatment of layout that usage is consistent with the Multiplexing module prototype, select the filename of corresponding Multiplexing module prototype, namely reusable generates and the on all four device layout of Multiplexing module prototype again.
In addition, the result of determination of third step S3 for the situation of negating under, carry out the 6th step S6: treat the layout printed board and carry out common topological design.
The＜the second embodiment 〉
Fig. 2 schematically shows the overview flow chart according to the printed board CAD layout method of second embodiment of the invention.
As shown in Figure 2, the printed board CAD layout method according to second embodiment of the invention comprises:
Initial step S0: set up one or more Multiplexing module prototypes; For example, can in the process of carrying out printed board CAD layout in the past, set up the database of Multiplexing module prototype; More particularly, can set up the Multiplexing module prototype by following manner: at first select the some devices as the module prototype, next selects the initial point of this module prototype reference (can be the symbol initial point of certain device in this prototype, can be certain pin etc. of certain device in this prototype), then key in the filename of a module prototype, newly-generated file is the Multiplexing module prototype.
First step S1: set up the sheet frame for the treatment of the layout printed board, and load the gauze for the treatment of the layout printed board;
Second step S2: treat the layout printed board and carry out topological analysis, carry out the functional module division in order to treat the layout printed board, thereby the layout that will treat the layout printed board is divided into a plurality of functional modules;
Third step S3: judge whether there be the functional module identical with Multiplexing module prototype function in a plurality of functional modules;
The result of determination of third step S3 be in the sure situation (specifically, for example, exist in a plurality of functional modules and Multiplexing module prototype logic function and usage identical functional module all), carry out the 4th step S4: by utilizing described Multiplexing module prototype as the local layout structure of the functional module identical with Multiplexing module prototype function, treat the layout printed board and carry out layout.Specifically, can use the Multiplexing module prototype by following manner: selection function, some devices for the treatment of layout that usage is consistent with the Multiplexing module prototype, select the filename of corresponding Multiplexing module prototype, namely reusable generates and the on all four device layout of Multiplexing module prototype again.
In addition, the result of determination of third step S3 for the situation of negating under, carry out the 6th step S6: treat the layout printed board and carry out common topological design.
The＜the three embodiment 〉
The design of the first embodiment and the design of the second embodiment can be combined.Specifically, Fig. 3 schematically shows the overview flow chart according to the printed board CAD layout method of third embodiment of the invention.
As shown in Figure 3, the printed board CAD layout method according to third embodiment of the invention comprises:
Initial step S0: set up one or more Multiplexing module prototypes; For example, can in the process of carrying out printed board CAD layout in the past, set up the database of Multiplexing module prototype; More particularly, can set up the Multiplexing module prototype by following manner: at first select the some devices as the module prototype, next selects the initial point of this module prototype reference (can be the symbol initial point of certain device in this prototype, can be certain pin etc. of certain device in this prototype), then key in the filename of a module prototype, newly-generated file is the Multiplexing module prototype.
First step S1: set up the sheet frame for the treatment of the layout printed board, and load the gauze for the treatment of the layout printed board;
Second step S2: treat the layout printed board and carry out topological analysis, carry out the functional module division in order to treat the layout printed board, thereby the layout that will treat the layout printed board is divided into a plurality of functional modules;
Third step S3: judge whether there is the identical function module in a plurality of functional modules; For example, preferably, the identical function module is logic function and usage identical functional module all;
The result of determination of third step S3 be in the sure situation (specifically, for example, subsistence logic function and usage identical identical function module all in a plurality of functional modules), carry out the 4th step S4: set up the Multiplexing module prototype for described identical function module, wherein, described Multiplexing module prototype has realized single identical function layout of the module in printed board; Equally, specifically, can use the Multiplexing module prototype by following manner: selection function, some devices for the treatment of layout that usage is consistent with the Multiplexing module prototype, the filename of the Multiplexing module prototype of again selection correspondence, namely reusable generates and the on all four device layout of Multiplexing module prototype.
After the 4th step S4, carry out the 5th step S5: by utilizing described Multiplexing module prototype as the local layout structure of described identical function module, treat the layout printed board and carry out layout.
In addition, the result of determination of third step S3 for the situation of negating under, carry out the 6th step S6: judge whether there be the functional module identical with Multiplexing module prototype function in a plurality of functional modules;
The result of determination of the 6th step S6 be in the sure situation (specifically, for example, exist in a plurality of functional modules and Multiplexing module prototype logic function and usage identical functional module all), carry out the 7th step S7: by utilizing described Multiplexing module prototype as the local layout structure of the functional module identical with Multiplexing module prototype function, treat the layout printed board and carry out layout.Equally, specifically, can use the Multiplexing module prototype by following manner: selection function, some devices for the treatment of layout that usage is consistent with the Multiplexing module prototype, the filename of the Multiplexing module prototype of again selection correspondence, namely reusable generates and the on all four device layout of Multiplexing module prototype.
In addition, the result of determination of the 6th step S6 for the situation of negating under, carry out the 8th step S8: treat the layout printed board and carry out common topological design.
＜identical function module 〉
Fig. 4 schematically shows Multiplexing module prototype 100 that the printed board CAD layout method according to the embodiment of the invention adopts and the schematic diagram of multiplex mode thereof.
Preferably, for example as shown in Figure 4, described Multiplexing module prototype comprises master chip and relevant discrete device, i.e. master chip and one or more discrete device.Described identical function module comprises also and comprising: the structure that represents all annexations of described master chip and described one or more discrete devices.
Particularly, as shown in Figure 4, in this embodiment, the Multiplexing module prototype 100 that adopts according to the printed board CAD layout method of the embodiment of the invention comprises: master chip 102, a plurality of discrete device 101 and the structure (such as wire structures etc.) that represents all annexations of described master chip 102 and described a plurality of discrete device 101; And preferably, although not shown, in fact Multiplexing module prototype 100 can also comprise that the lead-in wire fan-out is coiled on the surface, chip locally supplied power source is cut apart.
Thus, in the step of " by utilizing described Multiplexing module prototype as the local layout structure of described identical function module; treat the layout printed board and carry out layout ", perhaps in the step of " by utilizing described Multiplexing module prototype as the local layout structure of the functional module identical with Multiplexing module prototype function; treat the layout printed board and carry out layout ", can be in treating layout printed board PCB1 multiplexing Multiplexing module prototype 100 repeatedly, for example example shown in Figure 4 in treating layout printed board PCB1 to multiplexing Multiplexing module prototype 100 carried out twice multiplexing.
In the printed board CAD of embodiment of the invention layout method, carried out the design of the Multiplexing module of printed board CAD, after this in a kind of printed board, during multiplexing this Multiplexing module, be not subjected to the restriction of device name; Between different printed boards, during multiplexing this Multiplexing module, be not subjected to the restriction of device name yet, improved the CAD positioning efficiency.
Thus, in the printed board CAD of embodiment of the invention layout method, can carry out fast layout to printed board, because layout is multiplexing, corresponding CAD subsequent design, for example the lead-in wire fan-out is coiled on the surface, chip locally supplied power source is cut apart also can be multiplexing, improve printed board CAD design efficiency, similar modular blocks is many, and multiplexing number is many, and efficient is more obvious.
In addition, need to prove, term in the instructions " first ", " second ", " the 3rd " etc. describe each assembly of only being used for distinguishing instructions, element, step etc., rather than are used for logical relation between each assembly of expression, element, the step or ordinal relation etc.
Be understandable that, although the present invention with the preferred embodiment disclosure as above, yet above-described embodiment is not to limit the present invention.For any those of ordinary skill in the art, do not breaking away from the technical solution of the present invention scope situation, all can utilize the technology contents of above-mentioned announcement that technical solution of the present invention is made many possible changes and modification, or be revised as the equivalent embodiment of equivalent variations.Therefore, every content that does not break away from technical solution of the present invention according to any simple modification, equivalent variations and the modification that technical spirit of the present invention is done above embodiment, all still belongs in the scope of technical solution of the present invention protection.
Claims (10)
1. printed board CAD layout method is characterized in that comprising:
First step: set up the sheet frame for the treatment of the layout printed board, and load the gauze for the treatment of the layout printed board;
Second step: treat the layout printed board and carry out topological analysis, carry out the functional module division in order to treat the layout printed board, thereby the layout that will treat the layout printed board is divided into a plurality of functional modules;
Third step: judge whether there is the identical function module in a plurality of functional modules;
Under the result of determination of third step was sure situation, carry out the 4th step: set up the Multiplexing module prototype for described identical function module, wherein, described Multiplexing module prototype had realized single identical function layout of the module in printed board;
After the 4th step, carry out the 5th step: by utilizing described Multiplexing module prototype as the local layout structure of described identical function module, treat the layout printed board and carry out layout.
2. printed board CAD layout method according to claim 1, it is characterized in that, described Multiplexing module prototype comprises master chip, one or more discrete device and the structure that represents all annexations of described master chip and described one or more discrete devices.
3. printed board CAD layout method according to claim 1 and 2 is characterized in that, the identical function module is logic function and usage identical functional module all.
4. printed board CAD layout method is characterized in that comprising:
Initial step: set up one or more Multiplexing module prototypes;
First step: set up the sheet frame for the treatment of the layout printed board, and load the gauze for the treatment of the layout printed board;
Second step: treat the layout printed board and carry out topological analysis, carry out the functional module division in order to treat the layout printed board, thereby the layout that will treat the layout printed board is divided into a plurality of functional modules;
Third step: judge whether there be the functional module identical with Multiplexing module prototype function in a plurality of functional modules;
Under the result of determination of third step is sure situation, carry out the 4th step: by utilizing described Multiplexing module prototype as the local layout structure of the functional module identical with Multiplexing module prototype function, treat the layout printed board and carry out layout.
5. printed board CAD layout method according to claim 4, it is characterized in that, described Multiplexing module prototype comprises master chip, one or more discrete device and the structure that represents all annexations of described master chip and described one or more discrete devices.
6. according to claim 4 or 5 described printed board CAD layout methods, it is characterized in that, the result of determination of third step is that sure situation refers to and exists in a plurality of functional modules and Multiplexing module prototype logic function and usage identical functional module all.
7. printed board CAD layout method is characterized in that comprising:
Initial step: set up one or more Multiplexing module prototypes;
First step: set up the sheet frame for the treatment of the layout printed board, and load the gauze for the treatment of the layout printed board;
Second step: treat the layout printed board and carry out topological analysis, carry out the functional module division in order to treat the layout printed board, thereby the layout that will treat the layout printed board is divided into a plurality of functional modules;
Third step: judge whether there is the identical function module in a plurality of functional modules;
Under the result of determination of third step was sure situation, carry out the 4th step: set up the Multiplexing module prototype for described identical function module, wherein, described Multiplexing module prototype had realized single identical function layout of the module in printed board;
After the 4th step, carry out the 5th step: by utilizing described Multiplexing module prototype as the local layout structure of described identical function module, treat the layout printed board and carry out layout;
In addition, the result of determination of third step for the situation of negating under, carry out the 6th step: judge whether there be the functional module identical with Multiplexing module prototype function in a plurality of functional modules;
Under the result of determination of the 6th step is sure situation, carry out the 7th step: by utilizing described Multiplexing module prototype as the local layout structure of the functional module identical with Multiplexing module prototype function, treat the layout printed board and carry out layout.
8. printed board CAD layout method according to claim 7, it is characterized in that, described Multiplexing module prototype comprises master chip, one or more discrete device and the structure that represents all annexations of described master chip and described one or more discrete devices.
9. according to claim 7 or 8 described printed board CAD layout methods, it is characterized in that, the identical function module is logic function and usage identical functional module all.
10. according to claim 7 or 8 described printed board CAD layout methods, it is characterized in that, the result of determination of third step is that sure situation refers to and exists in a plurality of functional modules and Multiplexing module prototype logic function and usage identical functional module all.
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Application publication date: 20130109 |