Changes between Version 47 and Version 48 of faq


Ignore:
Timestamp:
02/27/2023 10:11:06 PM (15 months ago)
Author:
Tim Harvey
Comment:

removed Laguna info (EOL)

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  • faq

    v47 v48  
    131131 * 15W maximum per Mini-PCIe slot.
    132132
    133 Another example, the power supply on the Laguna GW2380 is rated to 10W total (@ 3.3V) which means 3A is available from the supply. The supply must provide power to the board (around 2.5W) and also any Mini-PCIe radios you have plugged into the board. Most standard radios run around 3.5W max which would leave around 4W for other devices. If you are using a higher wattage radio this would reduce the amount of power available to the J8 connector so this must also be considered. The J8 connector is rated for 1A per pin so you at most you would be limited to 3.3W for any peripheral powered by this connector.
    134 
    135 The pins on the J4 are rated to 3A so they will be able to source whatever is left available up to 3A.
    136 
    137133On a Ventana series board with a 2x5 expansion connector, the pins are rated to 1 amp. Therefore, at 3.3V this would be 3.3W of support. Note that GPIO lines are limited in current, please consult the user manual.
    138134
     
    177173
    178174[=#pci]
    179 == What throughput does the PCIe lane support? ==
    180 Laguna boards support PCI Gen1 which provides a maxium theoretical bus bandwidth of 2.5Gbits/sec.
    181 
    182 Ventana boards support PCI Gen1 due to early revisions of the boards not having an PCIe Gen2 external clock generator. Certain board revisions with an external clock generator can technically support Gen2 if it is enabled in software. See [wiki:ventana/PCIe] for more details.
    183 
    184 Note that Maxium bus throughput does not account for CPU processing or bus contention from multiple masters.
     175== What throughput does the PCIe lane support?
     176
     177PCIe bandwidth depends on the link established between the host controller and the peripheral (gen1, gen2, or gen3) as well as CPU and interrupt processing overhead.
     178 
     179see [wiki:PCI] for more details
    185180
    186181[=#temperature]