PEX 8648-AA RDK Hardware Reference Manual, Version 1.2
Copyright © 2010 by PLX Technology, Inc. All rights reserved
23
3.12 Device-Specific
Sideband Signals
The PEX 8648 switch has three device-specific sideband signals – FATAL_ERR#, PEX_INTA#, and
PEX_NT_RESET#.
3.12.1 FATAL_ERR# (TPV22, DS1)
FATAL_ERR# (Conventional PCI SERR# equivalent) output is used to indicate when the PEX 8648 switch
detects a Fatal, Unrecoverable error. This signal is brought out to labeled test point pad TPV22 on the
PEX 8648 RDK base board, so that the FATAL_ERR# signal ball can be accessed. The FATAL_ERR# signal
also drives a
red
LED indicator, DS1. (Refer to
Figure 21
for TPV22 and DS1 locations.)
MI
CTO
R
MI
CTO
R
CA
B
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T
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PO
R
T
WI
D
T
H
PO
RT
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BE
R
UP
PORT
NT
PORT
P
O
R
T
ST
AT
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J1
0
J1
1
J6
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J5
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4
P4
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P1
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P1
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JP1
2
S
L
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T
8-H
P
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OT5-HP
RES
E
T
PE
RST
SA
S
Lanes
4-
7
SA
S
Lanes
8-11
SA
S
Lanes
12-
1
5
SA
S
Lanes
0-
3
J1
J2
J3
Figure 21. TPV21, TPV22, DS1, and DS2 Placement on PEX 8648 RDK Base Board
3.12.2 PEX_INTA# (TPV21, DS2)
PEX_INTA# output is used for Conventional PCI INTA# signal compatibility. This signal is brought out to labeled
test point pad TPV21 on the PEX 8648 RDK base board, so that the PEX_INTA# signal ball can be accessed.
The PEX_INTA# signal also drives a
yellow
LED indicator, DS2. (Refer to
Figure 21
for TPV21 and DS2
locations.)
3.12.3 PEX_NT_RESET#
(TPV49)
PEX_NT_RESET# output is used to signal the reception of a Hot Reset from the NT Port Link Interface to the
NT Port Virtual Interface. This signal is brought out to labeled test point pad TPV49 on the PEX 8648 RDK base
board, so that the PEX_NT_RESET# signal ball can be accessed.
