IDT 89HPES64H16G2 User Manual page 14

IDT Table of Contents
Notes
PES64H16G2 User Manual
Power Management
Introduction ................................................................................................................................... 11-1
PME Messages............................................................................................................................. 11-3
PCI Express Power Management Fence Protocol ....................................................................... 11-3
Upstream Switch Port or Downstream Switch Port Mode .................................................... 11-3
Power Budgeting Capability.......................................................................................................... 11-4
General Purpose I/O
Introduction ................................................................................................................................... 12-1
GPIO Configuration ...................................................................................................................... 12-1
Configured as an Input ......................................................................................................... 12-1
Configured as an Output ...................................................................................................... 12-1
Configured as an Alternate Function .................................................................................... 12-1
SMBus Interfaces
Introduction ................................................................................................................................... 13-1
Master SMBus Interface ............................................................................................................... 13-1
Initialization........................................................................................................................... 13-1
Serial EEPROM.................................................................................................................... 13-2
Initialization from Serial EEPROM........................................................................................ 13-2
Programming the Serial EEPROM ....................................................................................... 13-5
I/O Expanders....................................................................................................................... 13-6
Slave SMBus Interface ............................................................................................................... 13-14
Initialization......................................................................................................................... 13-14
SMBus Transactions .......................................................................................................... 13-15
Multicast
Introduction ................................................................................................................................... 14-1
Addressing and Routing ............................................................................................................... 14-1
Multicast TLP Determination ................................................................................................ 14-1
Multicast TLP Routing .......................................................................................................... 14-4
Multicast Egress Processing ................................................................................................ 14-4
Register Organization
Introduction ................................................................................................................................... 15-1
Partial-Byte Access to Word and DWord Registers ............................................................. 15-2
Register Side-Effects............................................................................................................ 15-2
Address Maps............................................................................................................................... 15-3
PCI-to-PCI Bridge Registers................................................................................................. 15-3
Capability Structures ............................................................................................................ 15-3
IDT Proprietary Port Specific Registers.............................................................................. 15-10
Switch Configuration and Status Registers ........................................................................ 15-12
iv April 5, 2013