One Stop Systems, Inc. OSS-lanPMC-4GC User Manual
Rev. A
6
PMC Voltage Keying
The PCI-to-PCI bridge is capable of operating in either 3.3-volt or 5-volt signaling environments. Therefore, both voltage keying
holes are provided on the PCB as shown in Figure 1. When installing the card on a host, the voltage coding key (on the host) must
be installed in accordance with the host requirements. Note that 66MHz operation is only defined for 3.3-volt signaling
.
Ethernet Controller
Intel 82546EB is a Dual Port Gigabit Ethernet Controller in a single, compact component with two fully integrated Gigabit Ethernet
MAC and PHY functions. The controller is capable of transmitting and receiving two channels of data at rates of 1000 Mbps, 100
Mbps, or 10 Mbps. It has a 64-bit wide PCI 2.2 compliant interface capable of operating at up to 66MHz (PCI-X 133MHz though
supported by the device is not supported on this design). The device is in a 364 ball 1mm pitch BGA package. Two of these devices
are used to implement the four ports of 10/100/1000BASE-T
The 82546EB have a System Management Bus (SMB) interface and Serializer/Deserialzer interface. These interfaces are not used
on OSS-lanPMC-4GC.
LEDs
There is a 4X Bi-color LED on the front, with one LED for each port. When a LINK is asserted the green LED will be turned on.
When there is activity the yellow LED will be turned on. If there are continuous periods of activity, the green and yellow LEDs will
alternate
.
