IDT 89EBPES12N3, Evaluation Board Manual

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IDT Installation of the EB12N3 Eval Board Power Sources
EB12N3 Eval Board Manual (18-597-001) 2 - 4 November 2, 2006
Notes
Power Sources
The EB12N3 and all attached endpoint cards are powered entirely by the host system through the
upstream PCI Express edge connector. In general, this is sufficient and there is no need for an external
power-source. If the combined power requirements of the EB12N3 Evaluation Board and the devices
attached to the two downstream ports exceed PCI Express specifications, an external source may be
required to supply the necessary power.
External Power Source
If necessary, external power is supplied to the EB12N3 board through a 4-pin auxiliary power connector
attached to J5. The external power supply pr12V and +5.0V to the EB12N3 as described in Table
2.5. The +5V is unused.
.
PCI Express Serial Data Transmit Termination Voltage Regulator
A low-voltage, low-dropout regulator (Micrel MIC49300BR) provides a 1.5V PCI Express serial data
transmit termination voltage to the PES12N3.
PCI Express Digital Power Voltage Regulator
A low-voltage, low-dropout regulator (Micrel MIC49300BR) provides a 1.0V PCI Express digital power
voltage to the PES12N3.
PCI Express Analog Power Voltage Regulator
A low-voltage, low-dropout regulator (Micrel MIC49300BR) provides a 1.0V PCI Express analog power
voltage to the PES12N3.
Core Logic Voltage Regulator
The EB12N3 employs three low-voltage, low-dropout voltage regulators (Micrel MIC49300BR) to supply
the 1.0V core voltage to the PES12N3 switch.
Required Jumpers
To deliver power to the PES12N3 switch, the following jumpers must be shunted: W10, W22-W25.
4-Pin Power Connector – J5
Pin Signal
1 +12V
2 GND
3 GND
4 +5V
Table 2.5 Power Connector Pin-Out