One MFCC core (8441E or F) consumes 1.1 A.
With one MFCC, this leaves 1.9 A for the nose.
With two MFCCs, this leaves 0.4 A per nose.
If needed, a RIO2 can be modified to "boost" the 3V3 power supply.
The RIO3 (three) will be able to supply more current.
When a PEB (PMC
Extender Board) is used, there is no problem as that one has a more
powerful 3V3 generator.
The conclusion from this discussion was that the MFCC-ODIN nose may run from the 3V3 supply only and does not need it's own 3V3 generator (out of 5 V or 12 V). Only a RIO2 with both slots populated may give problems, but they may be removed with a modification to "boost" the 3V3 supply.
Calculation of power needed (from datasheets):
| HDMP-1032+1034 |
380 mA
|
| fibre-optic transceiver |
135 mA
|
| crystal oscillator |
15 mA
|
| LEDs |
15 mA
|
| Total (from datasheets, actual value is likely to be lower) |
545 mA
|
CERN - High
Speed Interconnect - S-LINK
Erik van der Bij
- 11 July 2000