SERDES Evaluation Kit DS99R105/106 USB Version 0.1 Users Manual
National Semiconductor Corporation
Date: 5/14/2008
Page 9 of 37
JP3: Pre-Emphasis Feature Selection
Reference Description
OPEN
(tied H)
CLOSED
(tied L)
JP3
Pre-Emphasis* – helps to
increase the eye pattern
opening in the FPD-LINKII
stream
Disabled –
no jumper
(Default)
Enabled –
With jumper
*Note: Pre-emphasis is only needed for lossy cables and/or long cable runs
JP1, JP2: USB Red and Black wire
Reference Description
VDD VSS OPEN
JP1
Power wire in USB cable
thru P2
(and P1 not
mounted)
connector
Jumper RED to VSS –
recommended
Note: Normally VDD in USB application
Red wire tied
to VDD
Red wire
tied to VSS
(Default)
Red wire
floating
(not
recommended)
JP2
Power wire in USB cable
thru P2
(and P1 not
mounted)
connector
Jumper BLACK to VSS –
recommended
Note: Normally VSS in USB application
Black wire
tied to VDD
Black wire
tied to VSS
(Default)
Black wire
floating
(not
recommended)
pin 2
RED WIRE
+
BLACK WIRE
_
pin 4
P2
USB A
pin 3
pin 1
top side thru the board view
(mounted on solder side)
