VSC3138
Datasheet
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VSC3138
PRBS_IN
PRBS_INB
+
PRBS
DETECTOR
ERRORS_DET
PRBS_ERRDET
SENSE
SENSEB
A[0], AN[0]
2
40 X 40
2
Y[0], YN[0]
A[39], AN[39]
DRIVE
DRIVEB
+
2
2
Y[39], YN[39]
PRBS
GENERATOR
PRBS_OUT
PRBS_OUTB
Figure 4. PRBS Connection Example
Input Configuration
The Global Input Channel Configuration register (address 283’h) and the Individual Input Configuration registers
(addresses 600’h through 647’h) are used to configure the properties of the high-speed data inputs. (See
These properties can be set either globally or individually on a per input basis. When a property is set globally, it affects
the setting for all inputs without exception. When a bit is set in the global registers, that state overrides any attempts to
change the setting on an individual basis; it forces the global setting until the bit in the global register is cleared.
The Individual Input Configuration registers also provide a function that is not available in the global registers: the
Scan register table. The Scan Input Value bit [8] of each Individual Input Configuration register (addressed 600’h
through 647’h) reflects the latched state of the associated high-speed input at the time that the Input State Latch bit
[0] of the Boundary Scan Control register (address 289’h) is set to 1.
7 of 44
G52414 Revision 4.2
March 8, 2006
VITESSE [ VITESSE SEMICONDUCTOR CORPORATION ]
