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OZ992 Datasheet Preview

OZ992 Datasheet

Intelligent Manager Smart ACPI GPIO/SCI

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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
ORDERING INFORMATION
OZ992S - 28 pin SSOP
OZ992
Intelligent Manager
Smart ACPI GPIO/SCI
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.
OZ992 provides up to 20 GPIO signals in regular
SMB slave mode. In addition, the OZ992 allows up to
16 System Control Interrupt (SCI) input transitions to
be written to the system’s embedded controller in
master mode. The OZ992 provides the perfect
solution for leading notebook vendors to stay ahead
of the competition.
The OZ992 is an SMBus 1.0 compliant ACPI GPIO
with 16 Programmable General Purpose I/Os pins
flexible for a variety of functions such as
programmable inputs/outputs, SMB/SMI interrupt
service, power-saving, modularized hardware ID, and
Auto LED Flash (ALF) status display. OZ992’s other
features include hardware-driven speaker alarm
output.
As a Pentium and x86-based system compatible
device, the OZ992 Smart ACPI GPIO is a highly cost-
effective and practical solution for today’s notebook
and palmtop computers, pen-based data systems,
personal digital assistants, and portable data-
collection terminals.
7/13/00
©Copyright 1998 by O2Micro
OZ992-SF-1.7
All Rights Reserved
Page 1




O2Micro

OZ992 Datasheet Preview

OZ992 Datasheet

Intelligent Manager Smart ACPI GPIO/SCI

No Preview Available !

PIN DIAGRAM
SMBCLK
SMBDATA
PWRGD
EOI#
GPIO[16]
GPIO[17]
GPIO[18]/TEST[0]
GPIO[19]/TEST[1]
GPIO[0]/SMIEVENT
GPIO[1]
GPIO[2]/SMBALERT#
GPIO[3]
GPIO[4]
GND
1
2
3
4
5
6
7
8
9
10
11
12
13
14
OZ992
28 VCC
27 32KHZ
26 RESETN
25 GPIO[15]
24 GPIO[14]
23 GPIO[13]
22 GPIO[12]
21 GPIO[11]
20 GPIO[10]
19 GPIO[9]
18 GPIO[8]
17 GPIO[7]
16 GPIO[6]
15 GPIO[5]
PIN DESCRIPTION
Name
SMBCLK
SMBDATA
PWRGD
EOI#
GPIO[17:16]
GPIO[19:18] /
TEST[1:0]
Pin No.
Type
Input
Drive
Definition
1I
TTL
-
SMBus Clock Input
SMBus Clock Input for SMBus protocol communication.
2 I/O
TTL 12mA
SMBus Data Input/Output
SMBus Data Input/Output for SMBus protocol communication.
3I
TTL
-
Host System Power Good
This pin indicates that the host systems power, including the Core Logic chipsets, is stable. Before the host
systems power is stable, this input pin will tri-state all the output pins from OZ992.
4I
TTL
-
End of Interrupt
The embedded controller will signify the OZ992 when the activated SCI has been serviced. This pin is to be
used with EC master mode only.
[6:5] I/O TTL 4mA
General Purpose I/Os
Fully programmable GPIOs that can be used for a variety of dedicated or specific functions. Pins GPIO[17:16]
default as inputs. They are programmable to function as either GPI[17:16] inputs or GPO[17:16] outputs. Refer
to GPIO[19:16] Config.1&2 Registers for more details and GPIO Config. Tables (section 5.0) for input/output
selections.
[8:7] I/O TTL 4mA
General Purpose I/Os
Fully programmable GPIOs that can be used for a variety of dedicated or specific functions. Pins
GPIO[19:18]/TEST[1:0] default as inputs. They are programmable to function as either GPI[19:18] inputs or
GPO[19:18] outputs. Refer to GPIO[19:16] Config.1&2 Registers for more details and GPIO Config. Tables
(section 5.0) for input/output selections.
During regular usage, pull-ups of 47Kshould be connected to GPIO[19:18]/TEST[1:0] to ensure the regular
OZ992 operation. Alternative uses for GPIO[19:18] are as TEST[1:0], which provide 2 proprietary OZ992 test
modes.
OZ992-SF-1.7
Page 2


Part Number OZ992
Description Intelligent Manager Smart ACPI GPIO/SCI
Maker O2Micro
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