9 Creating the Schematics

At this point in the design, it is time to start capturing the schematics. The following collection of information will aid you in creating the schematics:

• Key Considerations
  • SDRAM (and other) output clocks are internally looped back
  • Do not forget to install a JTAG connection
  • JTAG: Make sure to use the RTCK pin on the JTAG connector. For more information, see the Emulation and Trace Headers Technical Reference Manual.
• The AM335x Cortex-A8 Overview has links to TI hardware designs based on AM335x.
• It is helpful to refer to the EVM schematics (that can be downloaded from the EVM links listed in Section 2) as examples throughout the schematic capture process.
• Make sure to use the canned schematics in the device-specific data sheet for the following interfaces:
  • LPDDR/DDR2/3
• For the detailed information on USB board design, see the High-Speed Interface Layout Guidelines.
• During and after schematic capture, check your design against the schematic checklist:
  • AM335x Schematic Checklist
• Plan to have an internal review to go through the schematic checklist and inspect other key areas of the schematic to look for inaccuracies, missing net connections, and so forth.

Below is a list of additional aids available on the AM335x device's product page that can be used during your schematic and board design:

• Altium Symbols
• Pin names and numbers are listed in the device-specific data manual
• BSDL Simulation Model
• IBIS Simulation Models
• General Hardware Design/BGA PCB Design/BGA