Specifications

PCIe/104 and PCI/104-Express Specification Revision 3.0 February 17, 2015 Page 58
A.1 Bridge Module Configurations
The PCI-to-ISA Bridge module has three possible configurations: Basic, Stack-UP only, and Stack-DOWN Only.
Because of the heights of the Q2 (PCI/104-Express and PCIe/104) connectors and the ISA Bus (PC/104-Plus) connector
and because they reside in the same general location, interference can occur if a PCI-to-ISA Bridge module is placed next
to PCI/104-Express or PCIe/104 module.. In this case a Stack-UP Only or a Stack-DOWN Only version must be used. If
there is a PCI-104 module between the PCI-to-ISA Bridge module and a PCI/104-Express or PCIe/104 module then a
Basic configuration can be used.
Figure 6-19: Basic Configuration of the PCI-to-ISA Bridge Module
Figure 6-20: Stack-DOWN Configuration of the PCI-to-ISA Bridge Module
Figure 6-21: Stack-UP Configuration of the PCI-to-ISA Bridge Module
A.2 Stack Configuration Examples
PC/104-Plus Brid
g
e Module
PCI Device
PCI
PCI
PCI
ISA
PC/104-Plus Brid
g
e Module
PCI Device
PCI
PCI
PCI
ISA
PC/104-Plus Brid
g
e Module
PCI Device
PCI
PCI
PCI
ISA