Kontron CP932 - Manual (Page 30)

Functional Description CP932
Page 2 - 4 © 2005 Kontron Modular Computers GmbH ID 30048, Rev. 01
3004
8.01.UG.VC.050622/19130
1
P R E L I M I N A R Y
These devices contain four full-duplex 10/100/1000BASE-T transceivers, each of which per-
forms all of the physical layer interface functions for 10BASE-T Ethernet, 100BASE-TX, and
1000BASE-T Ethernet.
On the Broadcom BCM5388 switch controller, the remaining four ports feature a standard
RGMII interface to allow connection to the external 10/100/1000 Mbit/s PHY transceivers.
The six-channel variant of the CP932 uses only two of the remaining four ports of the Broad-
com BCM5388 switch controller.
On the Broadcom BCM5385 switch controller, the remaining port features a standard RGMII
interface to allow connection to the external 10/100/1000 Mbit/s PHY transceiver.
For further information on the Broadcom BCM5388 and BCM5385 switch controllers, refer to
the respective data sheets.
2.2.1 Thermal Aspects
The CP932 is equipped with a heat sink mounted on the Gigabit Ethernet switch controller. The
physical size, shape, and construction ensures the best possible thermal resistance (R
th
) co-
efficients. In addition, the CP932 is specifically designed to efficiently support forced air flow
concepts as found in a modern CompactPCI system chassis.
2.3 Gigabit Ethernet PHY
The Broadcom BCM5461S Gigabit PHY transceiver converts the RGMII signals from the MAC
of the switch controller into the appropriate Ethernet signals.
The five-channel variant of the CP932 is equipped with one Gigabit PHY transceiver, whereas
the six-channel variant of the CP932 is fitted with two Gigabit PHY transceivers.
The Gigabit PHY1 transceiver converts one RGMII channel on the BCM5385/BCM5388 to a
PHY level channel on the RJ45 connector, J5, on the front panel.
The Gigabit PHY2 transceiver converts one RGMII channel on the BCM5388 to a PHY level
channel connected to the Intel 82541PI PCI Gigabit Ethernet controller. It is responsible for the
realization of the onboard NIC channel. PHY2 is only available on the six-channel variant of the
CP932.
The Gigabit PHY1 and PHY2 are fully integrated 10/100/1000BASE-T Gigabit Ethernet trans-
ceivers optimized for low power and small footprint size to enable backplane and uplink appli-
cations. The Gigabit PHY architecture also meets the requirements of 802.3, 802.3u, and
802.3ab.
For further information on the Broadcom BCM5461S Gigabit PHY transceivers, refer to the re-
spective data sheets.