1.2
NT Function
The PEX 8632 supports the Non-Transparent function (NT mode). Only Port 0, 1, 2, or 3 of Station 0 can
be configured as the NT Port. There are three ways to enable the NT function and configure the NT Port
for the PEX 8632.
Method 1.
Use of the three NT Strapping balls:
STRAP_NT_ENABLE#
STRAP_NT_UPSTREAM_PORTSEL[1:0]
Pull down the STRAP_NT_ENABLE# to logic zero (0) to enable the NT function. Pull the
STRAP_NT_UPSTREAM_PORTSEL[1:0] up or down, to select Port 0, 1, 2, or 3, as the NT Port at
Station 0.
Method 2.
Enable the NT function and configure the NT Port through the serial EEPROM, when the
PEX 8632 switch is powered up.
Method 3.
Use the PEX 8632 I
2
C Port 0 to enable the NT function and configure the NT Port.
illustrates how to implement the NT functions, through the Strapping balls.
disable the NT functions, through the PEX 8632’s NT Strapping balls.
Figure 5. Enable NT Function with NT Strapping Balls
Figure 6. Disable NT Function with NT Strapping Balls
PEX 8632-AA Quick Start Hardware Design Guide, Version 1.1
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© 2007 PLX Technology, Inc. All Rights Reserved.
