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TMS320F28375D: Vdd maximum supply current

GR
Genius 3186 points
Part Number: TMS320F28375D


Hi

May I have question about F28375D Vdd maximum current?

I think Vdd (1.2V) is DSP core voltage.

Is this current (Idd) incread by only CPU operations? e.g. CPU frequency, crystal circle, PLL config.

And is the peripheral operation effect to Idd?

Thanks,

GR

  • +1
    TI__Guru* 95315 points

    GR,

              TMS320F28375D is a predominantly 1.2v device. The core and the peripherals run on 1.2v. 3.3v is used only in a few areas like the I/O buffers, Flash charge pump and ADC.

    GR said:
    I think Vdd (1.2V) is DSP core voltage.

    Not just the core. It includes all peripherals as well. For the analog peripherals, the digital portion is still powered by 1.2v.

    GR said:
    Is this current (Idd) incread by only CPU operations? e.g. CPU frequency, crystal circle, PLL config.

    No, it will be increased by peripheral operations as well. Take a look at Table 7-1 on page 55. The peripheral currents are shown under the VDD rail.

    GR said:
    And is the peripheral operation effect to Idd?

    The more peripherals you enable and operate, the more the Idd current will be.

  • 0 in reply to Hareesh Janakiraman
    Genius 3186 points

    Hi Hareesh,

    Thanks for your information.

    I understand that Vdd is use for peripheral operation not only DSP core.

    Is there test configuration for the mcu vdd supply will be maximum?

    And is the electrical circuit outside of mcu will be cause of incread Vdd current?

    Best regards,

    GR 

  • +1 in reply to GR
    TI__Guru* 95315 points
    GR said:
    Is there test configuration for the mcu vdd supply will be maximum?

    Please take a look at the Operational current test condition in SPRS880 (page 52, 8.5.1 Device Current Consumption at 200-MHz SYSCLK), including footnote #6. Those conditions are a reasonable representation to maximize current.

    GR said:
    And is the electrical circuit outside of mcu will be cause of incread Vdd current?

    No. Outside circuitry only impacts VDDIO

  • 0 in reply to Hareesh Janakiraman
    Genius 3186 points

    Hi Hareesh,

    Thanks for your information.

    I understand.

    Best regards,

    GR