VSC8634/VSC8664 Evaluation Board
VPPD-03084 VSC8634/VSC8664 User Guide Revision 1.1
3
3
General Description
The evaluation board (Figure 1) provides the user a way to evaluate the VSC8664 device in multiple
configurations. Only two of the 4 PHY ports are used on this board. Two RJ-45 connectors are provided
for copper media interfaces. And two SFP cages facilitate fiber media interconnects. The MAC interface
is provided only via SMA connectors.
For access to all of the features of the device, an external microcontroller is used to configure the on-
board clock chip via a two wire serial bus and the VSC8664 via the MDIO bus. The graphical user
interface (GUI) enables the user to access the registers.
The evaluation board uses a Zarlink device to synthesize a 25 MHz reference clock signal from a 20 MHz
crystal which serves as the REFCLK input.
3.1
Key Features
3.1.1
Copper Port RJ45 Connections
PHY Port 3 (J0) uses the UDE RTA 1648BAK1A with integrated transformer while PHY Port 0 (J3) uses a
generic RJ45 connector with discrete transformer (Pulse H5008).
3.1.2
SGMII/QSGMII MAC SMA
SGMII SMA connections are provided for the two exposed PHYs.
3.1.3
Switch Block Control
Confirm the SW1 switch positions as shown in the figure below, positions 1 and 2 to “OFF”, positions 3
and 4 to “ON”. ON = Logic 0, OFF = Logic 1.
Figure 2 • SW1 Switch Control
3.1.4
Zarlink ZL30143 SyncE G.8262/SETS
The ZL30143 is initialized by default to provide a 25MHz LVPECL clock (pin K9) to VSC8664 REFCLK
/XTAL1 input pin.
The ZL30143 can support synchronization with the VSC8664 PHY recovered clock for Sync-E operation,
contact Microsemi for more information.
3.1.5
Network Interface Microcontroller Card
A “Rabbit” microcontroller card is included to facilitate a software interface to the registers on the
VSC8664. The controller card has a hard coded static IP address. Refer to the label on the card for the
value. This address is required by the user to initiate communications via the board and the GUI.
Note: The factory programmed Rabbit board IP address is: 10.9.70.193.
