● Compliant with Advanced Configuration and Power Interface 

   Specification (ACPI), Revision 2.0b

● Compliant with System Management (SM) Bus, Version 2.0

● Forward bridging (PCI Express as primary bus, PCI as secondary 

   bus)

● Reverse bridging (PCI as primary bus, PCI Express as secondary 

   bus)

● Transparent mode support

● GPIO support (4 bi-directional pins)

● Power Management (including ACPI, CLKRUN_L,CLKREQ_L,

   PCI_PM)

● EEPROM (I2C) Interface

● SM Bus Interface

● Auxiliary powers (VAUX, VDDAUX, VDDCAUX) support

● Power consumption less than 0.45 Watt in typical condition

● Industrial temperature range (-40C ~ +85C)

PI7C9X111SL is a PCIe-to-PCI/PCI-X bridge. PI7C9X111SL is compliant with the PCI Express Base Specification, Revision 1.1, the PCI Express Card Electromechanical Specification, Revision 1.1, the PCI Local Bus Specification, Revision 3.0 and PCI Express to PCI/PCI-X Bridge Specification, Revision 1.0. PI7C9X111SL supports transparent mode operation. Also, PI7C9X111SL supports forward and reverse bridging. In forward bridge mode, PI7C9X111SL has an x1 PCI Express upstream port and a 32-bit PCI downstream port. The 32-bit PCI downstream port is 66MHz capable (see figure 1-1). In reverse bridge mode, PI7C9X111SL has a 32-bit PCI upstream port and an x1 PCI Express downstream port. PI7C9X111SL configuration registers are backward compatible with existing PCI bridge software and firmware. No modification of PCI bridge software and firmware is needed for the original operation.