Intel NetStructure ZT 5085, Manual

Page: 30 / 106

30
Technical Product Specification
Getting Started
Not all V(I/O) planes need to be configured for the same level. It is valid to have some V(I/O)
planes set to 3.3 V while others are set to 5 V.
Table 1 lists the V(I/O) shunts (Bolts), P1 keys, and
M66EN jumper settings required for different V(I/O) levels on each V(I/O) plane.
Warning: It is critical that each V(I/O) plane does not have both its 3.3 V and 5 V shunts loaded
simultaneously. Doing so causes permanent damage to the midplane and could pose a fire hazard.
Figure 14 on page 31 shows the locations of the V(I/O) shunts and the M66EN jumpers.
Table 1. V(I/O) Related Slot Capabilities
V(I/O) 66 MHz Operation
Universal Voltage
Boards
3.3 V Boards 5 V Boards
3.3 V No Yes Yes No
5 V No Yes No Yes
Table 2. V(I/O) Configuration Options
V(I/O) Plane Slot(s) V(I/O) Setting V(I/O) Shunt P1 Key Color
Fabric A 2
3.3 V V(I/O)A 3.3 V Position Cadmium Yellow
5 V (Default) V(I/O)A 5 V Position Brilliant Blue
CompactPCI*
Segment 1 3-9
and 11
3.3 V V(I/O)B 3.3 V Position Cadmium Yellow
5 V (Default) V(I/O)B 5 V Position Brilliant Blue
CompactPCI*
Segment 2 10
and 12-18
3.3 V V(I/O)C 3.3 V Position Cadmium Yellow
5 V (Default) V(I/O)C 5 V Position Brilliant Blue
PCI-Less 19 and 20
3.3 V V(I/O)D 3.3 V Position Cadmium Yellow
5 V (Default) V(I/O)D 5 V Position Brilliant Blue
Fabric B 21
3.3 V V(I/O)F 3.3 V Position Cadmium Yellow
5 V (Default) V(I/O)F 5 V Position Brilliant Blue