Overview
The AMD-766 peripheral bus controllerTM is an integrated circuit (IC), developed by AMD, to be the system Southbridge component of personal computer chipsets. The AMD-766 peripheral bus controller (the IC) connects to a host memory controller through the PCI bus.

Features
• PCI interface (PCI specification revision 2.2 compliant).
• LPC bus to connect peripherals such as super IO and BIOS.
• Partial ISA bus.
   • 8 bits wide.
   • Support for Flash BIOS.
• Enhanced IDE controller.
   • Support for two dual-drive ports.
   • PIO modes 0-4.
   • Multi-word DMA.
   • UDMA modes up to ATA-100.
• OHCI-based USB host controller with support for four ports.
• Serial IRQ protocol.
• ACPI-compliant power management logic.
   • Programmable C2, C3, power-on-suspend, suspend to RAM, suspend to disk, and soft off states.
   • Throttling.
   • Hardware traps.
   • System inactivity timer.
• 32 general-purpose IO (GPIO) pins (some are multiplexed with other hard-wired functions).
• Privacy/security logic (ROM access control).
• Legacy logic.
   • Programmable interrupt controller.
   • Programmable interval timer.
   • DMA controller (for LPC bus).
   • Legacy ports.
• IOAPIC controller.
• Real-time clock.
   • 256 bytes of CMOS RAM.
   • Battery-powered.
   • ACPI-compliant extensions.
• SMBus controller with one SMBus port.
• 272-pin BGA package.
• 3.3-volt core and output drivers; 5-volt tolerant input buffers.