General description
UCB1500 is a PCI-to-AC97 Bridge/Host Controller for modem or audio codecs equipped with the AC-link interface. It integrates a PCI 2.2 compliant interface for communication with the host PC, with built in support for PPMI (PCI Power Management Interface) and wake-up. It also integrates an AC97 Rev. 2.1 compliant host controller for connection to up to two AC-Link codecs, including analog modem front ends such as the Philips UCB1510, and audio codecs.

FEATUREs
■ 32-bit PCI 2.2 interface with bus master support
    ◆ Support up to two PCI functions with independent scatter/gather DMA
    ◆ PPMI and wake-up support via PME and VAUX
    ◆ Download of subsystem IDs and auxiliary power consumption via optional serial EEPROM
    ◆ 5 V tolerant interface for motherboard/PC add-on
■ AC97 rev 2.1 compliant host controller interface
    ◆ Supports up to two codecs
    ◆ Supports variable sample rate via the SLOTREQ protocol and valid tag bits
    ◆ Low latency GPIO data transfer
    ◆ Support modem wake-up on ring from D3cold
■ Advanced power management support
    ◆ PPMI (PCI Power Management Interface)
    ◆ Instantly available PC
    ◆ ACPI

APPLICATIONs
■ PCI-AC97 bridge/host controller
■ PCI modem cards
■ Host based modems