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TMS320F28379D: power supply for the TMS320F28379D controlCARD

Hongmei Wan
Intellectual 720 points
Part Number: TMS320F28379D


Hi,

I am using TMS320F28379D controlCARD. It has 2 options for the power supply, one from USB-5.0 using a zero resistor, R62, to connect with the following circuit and provide the power supply for the control card and another is from HSEC_5.0 using a diode, D1, to connect with the following circuit and provide the power supply for the the control card.

1. I am wondering if HSEC_5.0 is applied, can I use USB for debugging?

2. OR I have to disconnect the HSEC_5.0, then I can use USB for loading code and debugging? After debugging is fine, then disconnect the USB_5.0 and connect HSEC_5.0?

3. If HSEC_5.0 is higher than USB_5.0, what will happen?  The current will flow back to my PC?

Thanks,

Hongmei Wan

  • 0
    TI__Mastermind 42195 points

    Hongmei,

    Hongmei Wan said:
    1. I am wondering if HSEC_5.0 is applied, can I use USB for debugging?

    are you referring to J8 or A:J1? A:J1 is fully isolated from HSEC_5V0, so you should be OK. When using J8 for USB you should de-solder R83 to reduce the bus capacitance. Please note that de-soldering R83 will prevent the controlCARD from being powered through J8.

    Hongmei Wan said:
    2. OR I have to disconnect the HSEC_5.0, then I can use USB for loading code and debugging? After debugging is fine, then disconnect the USB_5.0 and connect HSEC_5.0?

    A:J1 should be used for your emulator connection. You will also need to power the C2000 device separately as it is isolated from A:J1. This can be done via the docking station or J8.

    Hongmei Wan said:
    3. If HSEC_5.0 is higher than USB_5.0, what will happen?  The current will flow back to my PC?

    In the event that you provide power from both HSEC_5V0 and USB_5V0(through J8) we have added diodes D1 and D3 to reduce the risk of damage to a PC.

    Regards,
    Cody