4 Hardware Options
This sections shows the hardware options for the VSC8489/90/91 evaluation boards.
4.1 Power Supply Options
There are two methods to supply power to this evaluation board, from a wall acadapteror from a bench
style power supply.
The evaluation board can be powered up using the 120 VAC wall socket. Simply plug in the AC adapter
(included in the kit) to a wall socket and the barrel end into the J89 connector. SW2 acts as the power on
/off switch.
The evaluation board can also be powered by an external 5 V power supply. Use a pair of banana cables
to connect a bench style power supply capable of 4 A at 5 V to the board. Connect 5 V to J90 and GND to
J91. SW2 acts as the power on/off switch.
4.2 Reference Clock Options
The EVB supports several device reference clock options. The on-board 156.25 MHz oscillator is the
primary reference clock, although two separate external references can be supplied on SMA connectors
J42 and J44 or J45 and J46. Additional clock rates can be generated using the Silabs 5338 device. These
optional reference clocks can be routed to the device inputs via the VSC3308 crosspoint which plays the
role of a clock distribution chip. Additional clock configuration options are available from the clocking
page of the GUI shown below.
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