Kontron AT8402 User Manual - Manual (Page 37)

AT8402 Hardware Description
Page 3 - 4 AT8402 User Guide
Fabric channels 1 and 2 with full four ports each provide connections to the hub slots in a dual
star configuration.
In addition to these 2x4 GbE fabric connections, ports 0 and 1 of fabric channels 13 and 14 are
also connected to the GbE switch on the AT8402. This enables full meshed operation in sys-
tems with up to 5 slots and a custom backplane.
3.1.2 PCI Express Infrastructure
The PCI Express Infrastructure consists of the PEX8532 PCI Express Switch with 32 lanes and
up to 8 ports. It conforms to revision 1.0a of the PCI Express Base Specification. The generic
switch settings are controlled from the IPMC via the CPLD.
Port numbering is according the PEX8532 numbering scheme.
The default upstream port (root complex) is port 8 (AMC B2).
The PEX8532 reads the strapping signal pins to determine the selection of the system mode,
the upstream port selected, and the lane configuration of all of the ports. The mode and lane
configuration are fixed, the upstream port and the transparent bridge port are predefined by the
IPMC via the CPLD. Any change in the strapping settings requires a reset of the PEX8532.
0/17 Fabric Channel 1, Port 3
0/18 Fabric Channel 1, Port 2
0/19 Fabric Channel 1, Port 1
0/20 Fabric Channel 1, Port 0
0/21 Fabric Channel 13, Port 1
0/22 Fabric Channel 13, Port 0
0/23 Fabric Channel 14, Port 1
0/24 Fabric Channel 14, Port 0
Table 3-2: PEX8532 Lane Port Assignment
Port Lane Connection
0 0 to 7 AMC B4, Channel 4 to 11
1 8 to 11 AMC B3, Channel 4 to 7
2 12 to 15 ATCA Update Channel
8 16 to 23 AMC B2, Channel 4 to 11
9 24 to 27 AMC B1, Channel 4 to 7
10 28 to 31 LSI SAS 1064E
Table 3-1: GbE Switch Port Assignment (Continued)
CLI ID Connection