1.b. Host interface board
The PCIe x4 host Interface board installs in a PCIe x4, x8, or x16 PCIe slot of a host system and cables down to a PCIe expansion
system or other PCIe x4 device.
t Cover
so available in
LVPECL
Clock Buffer
Downstream
X4 PCI
Express
Cable
Connector
Upstream
X4 PCI Express
Card Edge
Connector
PCIe Signal
Redriver
PCIe Signal
Redriver
X4
PCIe
X4
PCIe
Clock
*
Clock*
LEDs
Cable
resent/ Pw
P
r
LEDs
PCIe lane
status
X4
PCIe
X4
PCIe
CPRS
NT#
+3.3v
One Stop Systems, Inc. OSS-KIT-EXP-4500
Rev. A
Page 4
Slo
(Al
low profile height
)
3.35”
PCIe x4
Connect
Power on /
Cable
Ready
2.713”
*
Clock direction shown
in Host configuration
1.c. Host Expansion Board
The Host Expansion Board (HEB2) fits into the system slot of the CPCI chassis and connects through a high-speed PCIe x4 cable
to an upstream host. The HEB2 expands the PCI Express bus from a PCIe slot to a CompactPCI system at 20Gb/sec.
PCIe x4
connector
Card edge connector
Locking card
connector
1.d. Conceptual architecture
Upstream host
adapter
PCIe backplane in
the host enclosure
Compact PCI backplane
Downstream host
expansion board (HEB2)
PCIe x4 cable
