ocx256 ETC-unknow, ocx256 Datasheet - Page 10

• Manufacturer Part Number: ocx256
• Description: Ocx256 Crosspoint Switch
• Manufacturer: ETC-unknow

OCX256 Crosspoint Switch—Advanced Datasheet
10
Any Input
Any Input
(INx)
(INy)
Port
Port
The advantages of next neighbor clocking are:
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.
Only OUT1 can neighbor with OUT0, OUT3 with OUT2, etc. OUT2 cannot neighbor with OUT1,
or OUT4 with OUT3, etc.
Output Next Neighbor Pairs
1. Using next neighbor clocking in the registered output (RO) mode helps reduce the
2. For a design with a large number of outputs switching simultaneously, next neighbor
Crosspoint
skew in outgoing data.
clocking mode is useful to stagger outputs for reduced board noise caused by
simultaneous switching outputs.
Array
Figure 4
Pairing Sequence for Neighboring Outputs
Table 2
Neighbor
Neighbor
[Rev. 2.0] 3/21/02
0,1
Next
Next
CLK
CLK
Next Neighbor Clock Block Diagram
Next Neighbor Outputs
Select
Select
2,3
Clock
Clock
4,5
D
D
6,7
Q
Q
Output Mode
Output Mode
8,9
Select
Select
OE#
OE#
◗ ◗ ◗ ◗ 124,125
126,127
Fairchild Semiconductor
OUT0
OUT1