Having placed all the requisite components we now need to wire them together. There are three main techniques used to help make wiring a circuit as simple and quick as possible :
There is no ‘wiring mode’ in ISIS – wires can be placed and edited at any time, without the hassle of entering a dedicated wiring mode prior to placement. This means less mouse travel, less mode switching and quicker development.
Follow-Me Wire Autorouting
After starting to place a wire, the proposed route of the wire will follow the movement of the mouse orthogonally to the termination point of the wire.
Live Cursor Display
The cursor will change as a visual indicator when wiring to show when a wire can be placed, when a wire can be terminated and when a wire is being placed.
The basic procedure for placing a wire between two pins is given below, using the connection between the SCK pin of the memory device and the 100Ohm resistor as an example:
- Move the mouse over the SCK pin on the memory device – the cursor will change to a green pen.
- Left click the mouse and then move it to the left until it is over the pin of the 100 Ohm resistor. The wire will follow the mouse and the cursor / pen is white during wiring
- Left click the mouse again to commit the connection and place the wire.
The procedure for wiring onto an existing wire is almost identical but there are a couple of items to note:
- You cannot directly start a connection from an arbitrary point on a wire; in our example you want to start the connections from the pin and terminate them on the wire.
- When you terminate the connection on another wire a junction dot will be placed automatically to complete the connection.
If, during a design, you want to make a wire-to-wire connection you must first place a junction dot on the wire and then wire from the junction dot to the other wire
If you want to adjust a wire after placement (for example, the wire from the SDA pin to the resistor) then simply right click on the segment you want to move and then either select the ‘Drag Wire’ context menu option or simply depress the left mouse button and drag to the new location.
Armed with the above you should now be able to connect up all of the circuitry, so that your schematic now looks something like the following:
Remember, ISIS provides visual indicators to help you. If the cursor turns green you can start/stop wire placement.
Form more information please visit Wiring Up
#collected from the proteus>>help>> tutorial page
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