OCX160 Datasheet, PDF (10/44 Pages) List of Unclassifed Manufacturers – OCX160 Crosspoint Switch

OCX160 Crosspoint Switch—Preliminary Data Sheet
Any Input
Port
(INx)
Crosspoint
Array
CLK
Next
Neighbor
Output Mode
Select
DQ
OE#
OUT0
Any Input
Port
(INy)
Clock
Select
Output Mode
Select
CLK
Next
Neighbor
DQ
OE#
OUT1
Clock
Select
Figure 4 Next Neighbor Clock Block Diagram
The advantages of next neighbor clocking are:
1. Using next neighbor clocking in the registered output (RO) mode helps reduce the
skew in outgoing data.
2. For a design with a large number of outputs switching simultaneously, next neighbor
clocking mode is useful to stagger outputs for reduced board noise caused by
simultaneous switching outputs.
Note – Selecting the next neighbor clock for both outputs at the same time is not recommended.
Only one output in the pair at a time can be clocked by its next neighbor.
Table 2 Next Neighbor Outputs
Pairing Sequence for Neighboring Outputs
Output Next Neighbor Pairs 0,1 2,3 4,5 6,7 8,9 ◗ ◗ ◗ ◗ 76,77 78,79
Only OUT1 can neighbor with OUT0, OUT3 with OUT2, etc. OUT2 cannot neighbor with OUT1,
or OUT4 with OUT3, etc.
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[Rev. 1.6] 2/20/01
I-Cube, Inc.