OCX160 datasheet(13/44 Pages) ETC

13 / 44 page

OCX160 Crosspoint Switch—Preliminary Data Sheet

I-Cube, Inc.

[Rev. 1.6] 2/20/01

1.3.2

ImpliedDisconnect

ImpliedDisconnect is a feature that provides the ability to make fast switch connection changes.

When using the RC instruction “Connect, with ImpliedDisconnect” to establish a new connection,

any existing connection to that output port is automatically broken. Thus, a connection change,

i.e. breaking an existing connection and then making a new one, can be accomplished in one

RapidConfigure cycle.

Table 4

RCO[4:0] Readback Pin Assignment

RCO[4:0]

Readback Location

Signal/Function

Crosspoint

Connection Status:

0 = No connection (NC) — (default state at reset)

1 = Connected

Output Buffer

Clock Select:

0 = Global Clock — (default state at reset)

1 = Next Neighbor

Output Buffer

Output Mode:

0 = Flow-through (OP) — (default state at reset)

1 = Registered (RO)

O1, O0

0,0

0,1

1,0

1,1

Output Buffer

Output Enable:

Output enabled (ON) – this is the default state at reset

Output disabled (OFF)

Output controlled by OE (active high)

Output controlled by OE# (active low)

Table 5

Programming an Output Buffer using RapidConfigure

RCB[6:0]

Signal/Function

B6, B5, B4

Don’t care

Clock Select:

0 = Global Clock

1 = Next Neighbor

Output Mode:

0 = Flow-through (OP)

1 = Registered (RO)

B1, B0

0,0

0,1

1,0

1,1

Output Enable:

Output enabled (ON) – this is the default state at reset

Output disabled (OFF)

Output controlled by OE (active high)

Output controlled by OE# (active low)

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