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Last Post 20 Jun 2007 03:25 PM by  freem
Power refs aka NVCCx
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freem
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20 Jun 2007 01:25 PM
    Is there a doc on voltage and milliamps on the various NVCC rails?? Please do not point to the user manual, it does not have this info. Also, the schematic on page 11 of the SOM has R199 marked on my SOM as installed. However the PCB does not have this resistor.

    Thanks
    Michael Freeman
    Update Systems Inc.
    kurtl@logicpd.com
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    20 Jun 2007 02:50 PM
    Hi Mike,
    We don't have good information from Freescale on exact power draw for each NVCCx.

    The schematics are used to create multiple assemblies/BOMs so it is possible your specific assembly is slightly different than the schematic. The LogicPD website lists specifc BOMs by assembly number which can be found as a label on your SOM. The BOMs can be found on the product download page:

    http://www.logicpd.com/auth/downloads/i.MX31/

    -K
    freem
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    20 Jun 2007 03:25 PM
    I like the power and volts coming off of the SOM not how much the iMX is using. It would be nice if the IMX/SDRAM/FLASH and other power usage was subtracted from power numbers.

    SOM/SDK board conections, give me volts and mA for each of these:

    SOM NET NAMES:

      2.7V_NVCC5/NVCC8
      NVCC4
      1.8V_NVCC7
      1.8V_DDR
      VREF_ETHERNET
      2.7_NVCC6/NVCC9
      NVCC3
      SIM0_VCC


    SDK NET NAMES:

      VREF_UARTA
      VREF_I2C1 or VREF_CSI
      VREF_LCD
      VREF_DATA
      VREF_ETHERNET
      VREF_JTAG
      VREF_MMC/SD1 or VREF_PCMCIA
      SIM0VCC

    And while we are at it, how about a worst case power usage for the the SOM itself; MAIN_BATTERY, 5V, 3.3V
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