Introduction: Why invest in the allegro
He graduated from Electronic and Information Engineering. I believe that many students like me, in a similar class called EDA by DXP / Altium Designer PCB circuit to learn to draw, so most students should be using this software AD, at least the most basic process does not go wrong . But the current business environment, AD frequency of use is far not that high. Is due to a large extent on the part of genuine AD is very expensive, and his company all over the world to send a lawyer's letter, the fight against piracy; Another reason is the updated version of AD too fast, a year of great versions are a mere trifle, which led engineers require considerable time and effort to adapt to the new software used on, true trouble.
cadence allergo is a series of software in lieu of that, it contains a circuit diagram of the layout from drawing to drawing / PCB processes all functions of FIG. Now start drawing schematic library started learning allergo.
Creating a new schematic library
First, schematic drawing and schematic library design software is this:
For the first time after opening the pop-up window, select the mode to use this software. Here choose OrCAD Capture CIS, for convenience, you can check the lower left corner "is set as the default."
Open the software, click on the upper left corner of the File-> New-> Library. Create a new schematic library.
The new schematic library can set the save path and the name by saving the upper-left corner. As shown above, here named library1.olb.
Adding components in the schematic library
After the completion of the new schematic library, right-click. \ Library1.olb, select new new Part **** , the following pop-up window. Note here that, allergo which each component is a part.
The painting components name P13HDMI341ART, enter a name in the window, click OK to.
allergo automatically provides a body frame as a die, as shown in FIG.
Drawing components
With the chip body, you only need to add pins can be.
Right click on the screen button to add the pin, a window as shown below: allergo pin increases very intelligent functions, somewhat similar to the array of adhesive AD. Pins add window can be modified to add a number, and the variation number.
Here the left side is set to a start pin, successive increments, a total of 20.
After clicking the mouse to move to the left ok chip body, generates a left click pin 20, and the chip experience automatically change its length depending on the length occupied by the pin.
Add pins in the other direction, change the order of pins is not incrementing, but successive decreasing. This time you need to write the greatest number, and then change the amount of modification to "-1." As shown below:
This pin can be drawn out of the remaining side:
Pin finished adding as shown below, and then modify the pin names:
Left marquee a pin, select and right-click and choose edit pins . Pop-up window as shown below, modified pin names in the first column on the left side.
There is a very important point, schematic drawing in allergo, the same name of the component leads must be set to power properties . General chip pin name is the same VCC and GND power property, and NC (No connection), some attention.
Modify each column of each row is completed. If there is no modification in accordance with the above said good attribute, then the component is not saved.
