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TM4C1230C3PM: schematic review

Angela Zou
Intellectual 995 points
Part Number: TM4C1230C3PM

Tool/software:

Dear expert,

Please help review the schematic below, thank you.

  • 0
    TI__Guru**** 191296 points

    Hi,

      A few comments. 

      - I don't see enough LDO filter cap on VDDC. The recommendation is 3.3uF to 3.4uF. I only see 0.3uF on your schematic. 

      - Is there a bulk capacitance on VDD? I only see 0.1uF decoupling cap on each VDD pin. The combined VDD and VDDA bulk capacitance of the microcontroller is typically between 2 μF and 22 μF. Perhaps you have these on a different schematic page. 

      - The recommendation is to have pullup resistor on TCK/TMS/TDI if the JTAG signals are far from the MCU as it may pick noises. Otherwise, the MCU has internal pullup already. 

     Refer to this TM4C123 System Design Guideline for best schematic/layout practices. https://www.ti.com/lit/pdf/spma059