NAT-MCH-PCIex80

The NAT-MCH-PCIex80 HUB-Module provides an 80-lane PCIe Gen3 switch that allows each of the 12 AMCs in a MicroTCA.4.x system to be connected by a x4 link. It provides either two x8 or one x16 optional optical PCIe uplink(s) towards the front panel. An optional NAT-MCH-RTM is connected by an x16 link.

The PCIe switch also accommodates higher bandwidths, i.e. x8 or x16, to a reduced number of AMC slots if the backplane provides appropriate connectivity.

Finally, the PCIe switch provides the ability to establish up to four virtual PCIe clusters and assign the AMC slots to these. The up to four PCIe Root Complexes can be any of the AMC-CPUs, the CPU located on the NAT-MCH-RTM, or an external PC.

Processing Resources

• Lattice MachXO2 FPGA
• Atmel ATmega1284P
• PLX PEX8780

Front Panel Uplink (Assembly options)

• Without optical uplink
• One Gen3 x8 optical uplink
• Two Gen3 x16 optical uplink8s)

Front Panel Uplink

• 12 LEDs for Ethernet status and activity of 12 AMC slots
• 3 bi-colored LEDs for Ethernet status and activity of 3 optical uplinks
• 1 bi-colored LED for Ethernet status and activity of downlink to CPU on NAT-MCH

Backplane Interconnect

• Gen3 x1 and x4 to each AMC via Fabric D-G or
• Gen3 x8 and x16 switching functionality to reduced number of AMCs
  (not supported by standard backplanes)
• Gen3 x16 link to optional NAT-MCH-RTM

Clock

• 100 MHz PCIe compliant clock signal from NAT-MCH-CLK / NAT-MCH-CLK-PHYS
• PCIe clock can be provided as FCLKA to AMCs