1. Use the previously learned knowledge to create a PCB project file named "51 Microcontroller Minimum System" and save the file in the corresponding directory.
2. Create a schematic file under the project file and name it "51 Microcontroller Minimum System".
3. Click the "Properties[ˈprɒpətiz] (Properties)" option on the right, and the schematic properties window will pop up,
“Page Options-> Standard[ˈstændəd]Standard-> Sheet Size-> ;A4" adjusts the schematic layout to the standard A4 layout.
4. Place all the components in the attached picture. You need to add "Various kinds [ˌmɪsəˈleɪniəs]Miscellaneous Connectors[kəˈnɛktəz]Connectors.InLib", "Miscellaneous Devices[dɪˈvaɪsɪz]Devices.InLib" comprehensive library.
5. Place the network label: Under the "Place" menu, select "Network Label". At this time, the mouse cursor changes to a draggable network label. In this state, if you want to modify the initial value of the network label, press the key on the keyboard. Press the "Tab" button to enter the initial value setting interface of the network label. Click "OK" to confirm the initial value setting. Move the network label to the location where it needs to be placed, and click the left mouse button to complete the placement of the network label.
For network labels with a horizontal line, you need to add a "\" sign after each letter when entering the network label (that is, enter "R\E\S\").
6. Place the +5, VCC and GND power supply labels: On the schematic interface, find the power icon on the shortcut toolbar, click the corresponding VCC icon or GND icon, and place the power supply label at the corresponding position in the schematic diagram.
7. After the network labels and power labels are placed, the network labels or power labels with the same name in the entire schematic diagram will be automatically connected, and no wiring is required to connect.
9. Place text instructions: Select "Text String" under the "Place" menu. At this time, the mouse cursor changes to a draggable "Text" text. After placing the text at the corresponding position in the schematic diagram, double-click the text to enter the editing interface. , enter the text content in the "Text" column and enter the text format modification interface. Modifiable content includes: font type, font shape, size, font effect, color, etc., which can be modified according to the actual situation.
10. Modify component parameters: Double-click the component that needs to be modified, and the "Properties[ˈprɒpətiz] (Properties)" panel will pop up on the right side of the system. Enter the component parameter modification interface. The label of the component can be modified in the "Designator[ˈdɛzɪgneɪtə]" column, and the nominal value of the component can be modified in the "Comment" column. . The "Footprint (Package)" column in the window next to the interface can modify the component's package, and modify the component parameters according to the component parameter values provided in the table.
11. Overall numbering of all components: Select "Annotation" under the "Tools" menu, enter the overall component numbering interface, select the corresponding numbering sequence in the "Processing Order" option, and click the "Update Change List" button in the lower right corner of the window to pop up confirmation. menu, click "OK" and the window list on the right side of the interface will automatically list the numbers of all components. Click the "Accept Changes (Create ECO)" button in the lower right corner of the interface to pop up a list of component numbers to be changed. Click "Verify Changes" at the bottom of the window. button, and then click the "Execute Change" button, the system will automatically download the component number list to the schematic diagram, click the "Close" button to close the window, and complete the overall numbering of all components in the schematic diagram.
12. Modify the same component parameters (take the three resistors in the schematic diagram as an example): Move the mouse cursor to the resistor Res1 position, click the left mouse button and then right click, and select " "Find similar objects", the component filter parameter window pops up, in the drop-down menu behind the "Description[dɪˈskrɪpʃn]Description" Change "Any" in the bar to "Same" (meaning to filter out all components named "Resistor" in the schematic), then select the "Select Match, Create Expression" item at the bottom of the window, and click the "Apply" button , at this time, except for the three selected resistors in the schematic diagram, all other components have turned gray and cannot be edited.
Click the "OK" button to confirm the selected device, and "Properties[ˈprɒpətiz](Properties)" pops up on the right to enter the selected component Parameter modification interface, for example, if you want to modify the nominal value of the selected component to "123", you can go to "Comment[ˈkɒment]Comment< Modify the content in the a i=5>" column to "123", move the mouse cursor to another place and click the left button. At this time, the nominal values of all selected components in the schematic diagram will be modified to "123". The method of modifying the package of the same component is the same, except that the modified content is "Footprint[ˈfʊtprɪnt](package)".
13. Cancel filter components: After modifying some components, only the selected components can still be displayed in the schematic diagram, and other components are still gray and cannot be edited. At this time, you can right-click the mouse and select from the pop-up menu. "Clear filter" option, cancel the filter component, or use the shortcut key "Shift+C" to restore the normal editing state of the schematic.
14. Complete the placement and wiring of all components in the schematic diagram, as well as the setting of component parameters, and save the schematic diagram files and project files.
