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walidmstn
Visitor II
October 7, 2004
Question

lost power consumption

  • October 7, 2004
  • 7 replies
  • 1379 views
Posted on October 07, 2004 at 06:52

lost power consumption

    This topic has been closed for replies.

    7 replies

    W
    walidmstnAuthor
    Visitor II
    September 20, 2004
    Posted on September 20, 2004 at 15:04

    Hi all,

    In standby mode, how can I measure the just the power consumed by the STR71x devise itself ?

    Regards
    H
    hichem2
    Visitor II
    September 21, 2004
    Posted on September 21, 2004 at 06:57

    In order to measure the just the current consumed by the STR71x device it self 2 methods are possible:

    1) Connect all the V3.3 pins of the STR71x then use an ammeter to measure the micro consumption.

    2) In STANDBY mode you can use the nSTDBY pin to switch off all the others devices present in your board, then you can measure the current consumed by the ship.

    Hopefully this helps you.

    kind Regards,

    Hich

    W
    walidmstnAuthor
    Visitor II
    September 22, 2004
    Posted on September 22, 2004 at 15:07

    hi,

    thank you for your help,

    I wanna just asking the following:

    If I want STR710 micro goes into STANDBY mode ( PCU_STANDBY),

    I get the low DC current at 110 uA, do you beleive it's a good value ?

    Thanks;

    H
    hichem2
    Visitor II
    September 23, 2004
    Posted on September 23, 2004 at 06:54

    Hi cesar,

    Sorry,110u uA is not a good value ,because I already tried this test using the second method and i had 27uA.

    For that I wanna to now how did you do to measure the current consumed by the STR71x device it self.

    Tkanks,

    Hich

    H
    hichem2
    Visitor II
    September 23, 2004
    Posted on September 23, 2004 at 07:19

    Hi Cesar,

    Be sure that all the others devices in your board ( oscilator,resistance...) are switched off,else you must subtract their consumptions for the value that you found(110uA).

    Best Regards,

    Hich

    W
    walidmstnAuthor
    Visitor II
    October 6, 2004
    Posted on October 06, 2004 at 15:18

    Hi all,

    The user manual of the STR71x device shows that the core power consumption is typicaly 53mA (100 mA MAX) in running mode.

    Does anybody know if the PLL power consumption is taken into this account ?

    Thanks & Regards
    H
    hichem2
    Visitor II
    October 7, 2004
    Posted on October 07, 2004 at 06:52

    Hi,

    It's true that a maximum core power consumption value = 100mA(runing the maximum frequency) and PLL power consumption value is taken.

    but concerning a typical value,she depend of the others perepheral clocks states,MCLK & PCLK frequency value.

    For more informatios about this see the fallowing:

    2.5 AC Electrical Characteristics (page 24/39) in the datasheet.

    Regards,

    Hich

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