Changes between Version 9 and Version 10 of Hardware/jCM/cCM2/aHardware/RiserCard


Ignore:
Timestamp:
Jan 11, 2013, 1:28:13 AM (11 years ago)
Author:
Ilya Chigirev
Comment:

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  • Hardware/jCM/cCM2/aHardware/RiserCard

    v9 v10  
    1 === Custom Riser Card for MB770 Platform ===
     1===== Custom Riser Card for MB770 Platform =====
    22
    33MB770 motherboard is only PCI 2.1 compliant and therefore doesn't provide 3.3VSB (3.3 V stand-by voltage) on pin A14 of the PCI bus connector. This voltage is is supplied to the core of CM2 and is used to turn the main power on/off. Furthermore, even the wake-on LAN (WOL) connector on the motherboard doesn't provide stand-by voltage (and on most motherboards the WOL connector is not even installed).
    … …  
    77One solution to this problem was to create a custom riser card shown in figure 1 which has a separate feed for stand-by voltage directly from the power supply, voltage regulator for 5 to 3.3 V conversion and feeds 3.3V to the CM2 card on PCI connector A14.
    88
    9 ==== Standby voltage feed ====
     9====== Standby voltage feed ======
    1010
    1111[[Image(Clip.jpg, 160px, left)]] CM2 stand-by voltage is provided with the separate wire that is attached directly to the +5VSB wire of the ATX power supply with the self-tapping connector (MOLEX [http://delta.octopart.com/Molex__19216-0005.pdf Multi-Lock Insulation Displacement Connector (IDC)] ) show on figure 2.
    … …  
    4444
    4545
    46 ==== Installation ====
     46====== Installation ======
    4747
    4848The assembled node with custom raiser and CM2 card is shown in Figure 3. The +5VSB clamp and feeder wire are pulled out of the box just to emphasize the setup.