Abstract:
A system and method for providing schematic reviews is provided. The method includes providing a schematic design, selecting a signal, where the signal is a graphical representation, previewing the signal, obtaining relevant information on components constituting the signal, and controlling the signal to obtain relevant information on the components. Controlling the signal comprises activating a link to a data compilation related to the signal component, and activating the data compilation comprises creating a link to a datasheet. The graphic representation of the signal comprises providing a block diagram overview of connectivity of the signal components and the graphical representation comprises a graphical three dimensional model, and providing a log database that includes review information provided by multiple reviewers and is accessible by the reviewers. A notation medium is provided for the reviewers for communication between the reviewers.

Description:
BACKGROUND OF THE INVENTION 
     1. Field of the Invention 
     The present invention relates to providing schematic reviews in the product development lifecycle for board design processes. 
     2. Background Information 
     Typically, in a product development life cycle, high speed board design process schematic design reviews are important and critical. Schematic design entries are conventionally undertaken via a schematic editor to check the quality of the schematic entry a design review and a checklist follows. 
     A schematic page by page check can be performed by printing or by an online review of the schematic design entry tool by clicking on each net, reviewing start and end points, and then analyzing. For a typical design, which can have upwards of 300 pages or 5000 nets, it is usually necessary to flip the page every time to check each signal to see its starting point and end point. Tracking the signal is a manual endeavor, and hence a tedious process which requires a high level of concentration in order to identify logical errors in the design. 
     The primary purpose of a design review is to identify problems such as typographical errors on the assigned signal names, and the logical connectivity problems for the signals in the schematic design, that may have a relatively large number of pages. It may take a couple of days to complete the schematic review of a design having for more than 300 pages. 
     Thus, a conventional solution for schematic design review may require the reviewer to print all schematic sheets and review them page by page by flipping through the sheets to the corresponding nets. This method of schematic design review is time consuming and presents a high error possibility. 
     Another conventional solution for schematic design review may require the reviewer to check/verify online using conventional tools. For example, the reviewer may need to click on, “find net” or “highlight net”. This would show all the nets which are connected to the signal. However, there is a need to click each signal and see whether it is connected properly or not. This method of review can be highly confusing and cumbersome for a reviewer. 
     SUMMARY OF THE INVENTION 
     An embodiment of the invention comprises a method for providing schematic reviews for high speed board designs that includes providing a schematic design, selecting a signal in the schematic design, where the signal is provided as a graphical representation, previewing the signal, and obtaining relevant information on components constituting the signal. 
     In another embodiment, a system that comprises a memory configured to accept a schematic design, and an interface coupled to the memory. The interface selecting a signal in the schematic design, where the signal is provided as a graphical representation, the interface configured for previewing the selected signal, the interface configured for obtaining relevant information on components constituting the selected signal. 
     In another embodiment, a computer program product comprising a tangible computer readable recordable storage medium including computer useable program code for providing a schematic design, selecting a signal in the schematic design provided, wherein the signal is provided as a graphical representation, previewing the selected signal, and obtaining relevant information on components constituting the selected signal. 
    
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
         FIG. 1  is a schematic view of a computer system; 
         FIG. 2  is a schematic view of showing a schematic design review tool displayed on a monitor; 
         FIG. 3  is another schematic view of the schematic design review tool; 
         FIG. 4  is another schematic view of showing the schematic design review tool displayed on a monitor; and 
         FIG. 5  flow diagram showing a method for employing the schematic design review tool of the invention. 
     
    
    
     DESCRIPTION OF THE PREFERRED EMBODIMENTS 
     As will be appreciated by one skilled in the art, embodiments of the present invention may be implemented as a system, method, or computer program product. Accordingly, embodiments of the invention may take the form of an entirely hardware embodiment, an entirely software embodiment, including firmware, resident software, micro-code, etc., or an embodiment combining software and hardware aspects that may all generally be referred to herein as a “circuit,” “module” or “system.” Furthermore, embodiments of the invention may take the form of a computer program product implemented in any tangible medium of expression having computer usable program code embodied in the medium. 
     Any combination of one or more computer usable or computer readable medium(s) may be utilized. The computer-usable or computer-readable medium may be, for example but not limited to, an electronic, magnetic, optical, electromagnetic, infrared, or semiconductor system, apparatus, device, or propagation medium. More specific examples (a non-exhaustive list) of the computer-readable medium would include the following: an electrical connection having one or more wires, a portable computer diskette, a hard disk, a random access memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or Flash memory), an optical fiber, a portable compact disc read-only memory (CDROM), an optical storage device, a transmission media such as those supporting the Internet or an intranet, or a magnetic storage device. 
     Note that the computer-usable or computer-readable medium could even be paper or another suitable medium, upon which the program is printed, as the program can be electronically captured, via, for instance, optical scanning of the paper or other medium, then compiled, interpreted, or otherwise processed in a suitable manner, if necessary, and then stored in a computer memory. In the context of this document, a computer-usable or computer-readable medium may be any medium that can contain, store, communicate, propagate, or transport the program for use by or in connection with the instruction execution system, apparatus, or device. The computer-usable medium may include a propagated data signal with the computer-usable program code embodied therewith, either in baseband or as part of a carrier wave. The computer usable program code may be transmitted using any appropriate medium, including but not limited to wireless, wireline, optical fiber cable, RF, etc. 
     Computer program code for carrying out operations of the present invention may be written in any combination of one or more programming languages, including an object oriented programming language such as Java, Smalltalk, C++ or the like and conventional procedural programming languages, such as the “C” programming language or similar programming languages. The program code may execute entirely on the user&#39;s computer, partly on the user&#39;s computer, as a stand-alone software package, partly on the user&#39;s computer and partly on a remote computer or entirely on the remote computer or server. In the latter scenario, the remote computer may be connected to the user&#39;s computer through any type of network, including a local area network (LAN) or a wide area network (WAN), or the connection may be made to an external computer, for example, through the Internet using an Internet Service Provider. 
     Embodiments of the invention are described below with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of the invention. It will be understood that each block of the flowchart illustrations and/or block diagrams, and combinations of blocks in the flowchart illustrations and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to a processor of a general purpose computer, special purpose computer, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create means for implementing the functions/acts specified in the flowchart and/or block diagram block or blocks. These computer program instructions may also be stored in a computer-readable medium that can direct a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the computer-readable medium produce an article of manufacture including instruction means which implement the function/act specified in the flowchart and/or block diagram block or blocks. 
     The computer program instructions may also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer implemented process such that the instructions which execute on the computer or other programmable apparatus provide processes for implementing the functions/acts specified in the flowchart and/or block diagram block or blocks. 
     It will be readily understood that the components of the embodiments of the invention, as generally described and illustrated in the Figures herein, may be arranged and designed in a wide variety of different configurations. Thus, the following more detailed description of the embodiments of the apparatus, system, and method of the present invention, as represented in  FIGS. 1 through 5 , is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention 
     Furthermore, the described features, structures, or characteristics may be combined in any suitable manner in one or more embodiments. In the following description, numerous specific details are provided, such as examples of programming, software modules, user selections, network transactions, database queries, database structures, hardware modules, hardware circuits, hardware chips, etc., to provide a thorough understanding of embodiments of the invention. One skilled in the relevant art will recognize, however, that the invention can be practiced without one or more of the specific details, or with other methods, components, materials, etc. In other instances, well-known structures, materials, or operations are not shown or described in detail to avoid obscuring aspects of the invention 
     Referring now to  FIG. 1 , there is shown an embodiment of a computer system  12 , which may be employed in accordance with one or more embodiments of the invention. It is to be understood that the system  12  is provided by way of an illustrative and non-restrictive example and that of course other types of computer systems can be employed with the embodiments of the invention set forth herein. 
     Computer system  12  may be a notebook computer system, such as one of the ThinkPad series of personal computers previously sold by the International Business Machines Corporation of Armonk, N.Y., and now sold by Lenovo (US) Inc. of Morrisville, N.C. However, as will become apparent from the following description, the invention is applicable to any data processing system, including portable electronic devices such as PDA, mobile phones etc. Notebook computers may alternatively be referred to as “notebooks”, “laptops”, “laptop computers” or “mobile computers” herein, and these terms should be understood as being essentially interchangeable with one another. 
     As illustrated in  FIG. 1 , the computer system  12  includes at least one system processor  42 , which is coupled to a Read-Only Memory (ROM)  40  and a system memory  46  by a processor bus  44 . System processor  42  may be a general-purpose processor that executes boot code  41  stored within ROM  40  at power-on and thereafter processes data under the control of operating system and application software stored in system memory  46 . System processor  42  is coupled via processor bus  44  and host bridge  48  to Peripheral Component Interconnect (PCI) local bus  50 . 
     PCI local bus  50  supports the attachment of a number of devices, including adapters and bridges. Among these devices is network adapter  66 , which interfaces computer system  12  to a LAN (not shown), and graphics adapter  68 , which interfaces computer system  12  with display  69 . Communication on PCI local bus  50  is governed by local PCI controller  52 , which is in turn coupled to non-volatile random access memory (NVRAM)  56  via memory bus  54 . Local PCI controller  52  can be coupled to additional buses and devices via a second host bridge  60 . 
     Computer system  12  further includes Industry Standard Architecture (ISA) bus  62 , which is coupled to PCI local bus  50  by ISA bridge  64 . Coupled to ISA bus  62  is an input/output (I/O) controller  70 , which controls communication between computer system  12  and attached peripheral devices such as a keyboard and mouse. In addition, I/O controller  70  supports external communication by computer system  12  via serial and parallel ports. A disk controller  72  is in communication with a disk drive  200 . It should be appreciated that the system  12  may be built with different chip sets and different bus structures, as well as with any other suitable substitute components, while providing comparable or analogous functions to those discussed. 
     The computer system  12 , or essentially any other suitable or analogous system, can be employed to carry out the inventive processes as set forth below; for instance, display  66  of system  12  could be employed to provide the screen displays illustrated in  FIGS. 2-4 . 
     Referring to  FIGS. 2-4 , according to one embodiment, a method that provides the provision of a preview of each signal, when selected in a schematic design editor tool in a pictorial representation. When a user clicks on a new schematic review environment (SRE) icon, a new window can be displayed with a block diagram showing how the signal is connected to different components (shown in  FIG. 2 ). By doing this, a reviewer/user can ensure that the signal overall view is captured in one place, thus obviating a need to flip through each schematic page manually for every signal. When performing an online review, the reviewer/user does not need to click on the signal search results for each signal, which could be many. This substantially reduces the schematic review time. The reviewer/user can spend time more productively and an undesirable re-spin of the board can often be avoided (which otherwise might be necessitated by some simple mistakes on the logical connections in the processor or a main ASIC used in the board.) 
     In one embodiment, a datasheet is attached to the symbols used in the schematic design editor tool. In this embodiment, a single mouse click on a symbol can show a link to the location where the datasheet is stored, while a double mouse click could open the datasheet for the selected symbol. To enable this feature, the symbol datasheet could be attached to the symbol attributes or give the link to the symbol in some central database where it could be located, shown in  FIG. 3 . This allows the schematic reviewer/user to check the footprint information, pin information, pin description, functional information, electrical parameters, and so forth, enabling the reviewer/user to work more effectively and efficiently. An example of the datasheet so appearing on the display screen is shown in  FIG. 4 . 
     In one embodiment, the method may also be employed to attach 3D (Pro E) models of the symbol, as normally may be used in mechanical and industrial design to ensure that the components&#39; height and orientation are consistent with design requirements. Of note: should the schematic reviewer/user desire to view the 3D models of the symbol, then corresponding software such as Pro E should be installed in the computer system  12  (not discussed or disclosed herein. 
     In view of the foregoing, it can also be appreciated that a schematic design review may be done independently by a reviewer/user, i.e., performing a logical review, mechanical review, or industrial review, using the invention, without involving a team. This functionality could save the time of the designers involved in the board design. Multiple reviewers/users could do the review at the same time by looking at the review log database. 
     In one embodiment, the method can be enabled when a design entry is complete and the net-list for that design is complete. Also, a symbol designer may have attached an attribute for the datasheet of the part in the symbol, while creating a logical symbol. 
     Referring now to  FIG. 5 , there is shown a flow diagram illustrating an embodiment of a method of a schematic design editor tool. Execution of the method commences in START block. In process block  502 , a design entry is completed and the pages of the design are saved. Next, in process block  504 , a net-list for the entered design is created. In process block  506 , a schematic review platform is enabled by clicking a Schematic Review Environment (SRE) icon. 
     By enabling the review platform, the platform will generate the symbols required for the review by seeing the net-list like Chip/ASIC, resistor, connector, capacitor, inductor, diode, LED, etc., along with an arrangement for showing the symbols which are connected in the schematic design. 
     In process block  508 , the review platform extracts all power and ground nets. Thereafter, all symbol pin information and the datasheet for the corresponding symbol may be extracted, shown in process block  510 . Next, process block  512 , a symbol pin or signal is selectively clicked on in order to be reviewed. In process block  514 , a background process may then generate a small window which shows a block diagram of the connectivity of the pin from the net-list, which was created at step  504 . For example, a processor (U 1 ) pin  4  could be connected to a resistor to a 3.3V source. 
     Thus, the method can create a small box for the U 1  chip and a rectangle symbol for the resistor and a standard voltage source. Once a corresponding window pops-up (shown in  FIG. 2 ), then the reviewer/user can click on the U 1  to see the attributes and a link to the datasheet (see  FIG. 3 ); this may involve, going to a page where a U 1  schematic symbol is available, where double clicking on the symbol will open the datasheet (see  FIG. 4 ). In decision block  516 , the reviewer/user may review the datasheet to confirm whether the correct pin is at hand or not. 
     If the connection is correct, then the reviewer/user may click on “OK”, in process block  518 , where a log/review report can be created in text format and saved in a folder dedicated to schematic review (e.g., folder “sch — 1”) along with schematic pages. Another pin or symbol can then be reviewed in process block  512 . This review log could be in a database serving as a central location for the project where multiple users can gain access, whereby multiple reviewers or designers can see the review output. 
     If the connection is determined not to be correct, in decision block  516 , then a new log/review report can be created for which a note can be written on the signal, in process block  520 . By writing a note on the signal, it can be ensured that other reviewers will not have to review the schematic in regards to the incorrect connection, while allowing a designer to correct the error without having to interact with a reviewer/user. The method then ends. 
     To review this process more generally, the tool may generate a standard model (e.g., basic graphics such as a rectilinear box) for each general component, e.g., Silicon/ASIC, Resistor, Capacitor, Inductor, Transistor, Connector etc. Once the schematic review platform is enabled, symbols can be newly created in parallel to a user performing the schematic entry. This thus can present an even greater degree of interactive user review; the tool, e.g., could query the designer if a new symbol with a newly distinct reference designator is to be used in the design by opening a new window with list of general names of the components; in this way, the tool may create the symbol as appropriate along with the corresponding pins. 
     By way of elaborating on the method, and returning to  FIG. 2 , there is shown an illustrative and non-restrictive example of an SRE in accordance with one embodiment. Initially, the SRE icon may be clicked to create all required shapes for a “bird&#39;s eye” view. Thereafter, the net that needs to be reviewed can be clicked. As shown, a window (the pop-up) can then be created that has a block diagram or bird&#39;s eye view of the signal and of how it is connected, including pin numbers of the chip. Thus obtained is a powerful utility for doing schematic review and for finding out logical and manual errors in connecting the nets. 
     A single click on “U 1 ” may yield attributes thereof; this is shown in  FIG. 3  (in the pop-up). These attributes can already be readily attainable via the schematic review tool. However, more extensive information, as discussed heretofore, can be attained via the link to the datasheet (such as shown in the pop-up in  FIG. 3 ). 
     Thus, the invention may reduce the occurrence of a re-spin of a board which may provide a cost savings. Time savings, particularly for reviewers/users, are attainable. For instance, there is no need for online review, unless required, and a reviewer/user may perform a design review independently, without a need for consulting team members or a designer. The method substantially reduces the probability of manual error and product life cycle time may be reduced, by way of employing an embodiment of the semi-automated schematic design review herein. 
     It is to be understood that the present invention, in accordance with at least one embodiment, includes elements that may be implemented on at least one general-purpose computer running suitable software programs. These may also be implemented on at least one Integrated Circuit or part of at least one Integrated Circuit. Thus, it is to be understood that the invention may be implemented in hardware, software, or a combination of both. 
     Generally, embodiments may take the form of an entirely hardware embodiment, an entirely software embodiment or an embodiment containing both hardware and software elements. An embodiment that is implemented in software may include, but is not limited to, firmware, resident software, microcode, etc. 
     Furthermore, embodiments may take the form of a computer program product accessible from a computer-usable or computer-readable medium providing program code for use by or in connection with a computer or any instruction execution system. For the purposes of this description, a computer-usable or computer readable medium can be any apparatus that can contain, store, communicate, propagate, or transport the program for use by or in connection with the instruction execution system, apparatus, or device. 
     The medium can be an electronic, magnetic, optical, electromagnetic, infrared, or semiconductor system, (or apparatus or device) or a propagation medium. Examples of a computer-readable medium include a semiconductor or solid state memory, magnetic tape, a removable computer diskette, a random access memory (RAM), a read-only memory (ROM), a rigid magnetic disk and an optical disk. Current examples of optical disks include compact disk—read only memory (CD-ROM), compact disk—read/write (CD-R/W) and DVD. 
     Those skilled in the art will appreciate that various adaptations and modifications of the just-described preferred embodiments can be configured without departing from the scope and spirit of the invention. Therefore, it is to be understood that, within the scope of the appended claims, the invention may be practiced other than as specifically described herein.