Jumper block settings
27
Power SMB (I
2
C) connector
Power System Management Bus (I
2
C) connector (JPI
2
C) monitors power supply, fan status and
system temperature.
Jumper block settings
Jumper shunts can be used to create shorts between two pins to change the function of the
jumper block (header) on the motherboard. See Board layout on page 10 for jumper block
locations. Pin 1 is identified with a square solder pad on the printed circuit board.
Note: When a two-pin jumper shunt is used, the circuit is “closed.” When the jumper shunt is
removed, the circuit is “open.”
Figure 6. Jumper blocks and shunts
Table 29. PWR SMB pin definitions
Pin # Definition
1Clock
2Data
3PWR Fail
4 Ground
5+3.3V
Jumper
Block
Jumper
Shunt
Installed
Pins 1-2
Closed
3 2 1
3 2 1
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