NAT-MCH Users Manual Version 1.16

NAT-MCH – Users Manual
5.4.7 PCIe Switch Configuration [9] (optional)
By the PCIe configuration parameters the operation of the (optional) PCIe Hub module is
controlled.
Configuration Option default Description
operating mode (cluster 1) transparent Operation mode of the PCIe Switches (PCIe cluster
1)*:
• default (transparent)
• NT Intelligent Adapter mode
• NT Dual-Host mode
Upstream transparent slot number 0 AMC slot number where the host CPU resides in. (i.e.
(cluster 1)
root complex). (PCIe cluster 1)*
Upstream non-transp slot number 0 AMC slot number where the non transparent host
(cluster 1)
CPU resides in for dual host mode. (PCIe cluster 1)*
operating mode (cluster 2) transparent Operation mode of the PCIe Switches (PCIe cluster
2)*:
• default (transparent)
• NT Intelligent Adapter mode
• NT Dual-Host mode
Upstream transparent slot number 0 AMC slot number where the host CPU resides in. (i.e.
(cluster 2)
root complex). (PCIe cluster 2)*
Upstream non-transparent slot 0 AMC slot number where the non transparent host
number (cluster 2)
CPU resides in for dual host mode. (PCIe cluster 2)*
upstream slot power up delay 5 sec Delay applied to the slot where the upstream CPU
resides in. The delay is applied before payload power
is turned on. (*)
100 MHz spread spectrum clock Disabled If enabled the FCLK-A clock will be of spread
spectrum type with 100 MHz means. If disabled the
FCLK-A is a 100MHz fixed clock.
Hot plug support Disabled Enables PCIe Hot Plug Support.
PCIe early Ekey Disabled Executes the E-Keying before Payload power is
applied
‘no ekey’ for PCIe Disabled Disables E-Keying for PCIe lanes (for debugging
only)
PCIe clustering Disabled Enables PCIe clustering for PCIe x48 HUB modules.
If PCIe clustering is enabled the mode, transparent
upstream and non-transparent upstream port
parameters can be set for each switch separately. In
communication between the two clusters is not
possible in this case!
Remarks (*)
The power-up sequence and delays defined by the backplane FRU info device might not be sufficient in all
situations for systems with PCIe boards, as usually all I/O boards need to be ready before the CPU board may
start its PCI scan.
Therefore an extra delay in the MCH configuration record can be defined for the PCIe upstream host.
The settings for the second PCIe cluster are only valid if “PCIe clustering” is enabled via the corresponding flag.
Version 1.16 © N.A.T. GmbH 36