GENERAL DESCRIPTION
O2Micro’s OZ992 Smart ACPI/SCI (System Control Interrupt) General Purpose Input/Output unit allows OEMs to transform their legacy systems to ACPI compliant systems by supporting up to 16 extra SCI inputs. Regular core logic chipsets, such as the Intel 430TX/BX and ACPI compliant embedded controllers have limited allowance for the GPIO or SCI input signals for the system. The OZ992 provides a bridge between the chipsets and the rest of the system to allow system designers a cost-effective way to improvise for such a deficiency.

FEATURES
•  SMBus, version 1.0, Compliance
•  Master mode function to interface with ACPI compliant embedded controller
•  Support Pentium and x86-based designs
•  Supported by default embedded controller firmware
•  Accept up to 16 SCI inputs
•  Programmable level or edge (falling and rising edge) triggered SCI inputs
•  20 possible edge-sensitive programmable General Purpose Inputs/Outputs per device
•  Programmable addresses for cascading OZ992s
•  32KHz operating frequency
•  Supports 3.3v or 5v supply
•  LOW-power hardware-driven speaker alarm output
•  Software programming kit available
•  SMBALERT# and SMIEVENT outputs
•  8 programmable interrupt inputs for SMI event or SMBALERT#
•  8 Auto LED Flash(ALF) programmable outputs with 10% or 50% duty cycles