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OZ990 Datasheet Preview

OZ990 Datasheet

Intelligent Manager Smart PMU/GPIO

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FEATURES
SMBus 1.0 Compliant
Support Pentium class and x86-based designs
PMU, GPIO, and Alternative PMU modes
WAKE output and Suspend Status input operates
synchronously with PMU in notebook chipsets
LOW power-saving Suspend mode
Hardware Debounced Wakeup/Suspend input as
pushbutton
4 Power Control programmable outputs with built-
in Power Sequencing at 10 ms to 1 second
programmable intervals
Optional Wakeup-Disable inputs
Optional Power-On inputs
8 programmable interrupt inputs for SMIEVENT
or SMBALERT#
8 Suspend/Wakeup edge-triggered
programmable inputs
20 possible programmable edge-sensitive
General Purpose Inputs/Outputs
8 Auto LED Flash(ALF) programmable outputs
with 10% or 50% duty cycles
LOW power hardware driven speaker alarm
output
Up to 6 programmable unique addresses for
device cascade
8 power-on modularized hardware ID
programmable inputs
32KHz operating frequency
5 V tolerant inputs
Supports both 3.3 V and 5 V operating
environments
Software programming kit available
ORDERING INFORMATION
OZ990S - 28 SSOP
OZ990
Intelligent Manager
Smart PMU/GPIO
GENERAL DESCRIPTION
O2Micro’s OZ990 Smart PMU/GPIO (Power
Management Unit/General Purpose Input Output) unit
allows the implementation of Green PC Desktop
Chipsets in notebook designs at considerably lower
cost than conventional methods while closing the
technology gap between desktop and notebook
computers by offering an extensive number of
powerful power management and general purpose I/O
features. With the OZ990 stand-alone PMU capability,
the ability to provide the One-Shot Design for
PMU/BIOS practically eliminates the need to redesign
PMUs to match the ever-changing core logic chipsets.
The OZ990 provides the perfect solution for leading
notebook vendors to stay ahead of the competition.
The OZ990 is an SMBus 1.0 compliant device with 4
Power Control and 16 Programmable General
Purpose I/Os pins flexible for a variety of functions
such as Power Control with sequencing,
programmable inputs/outputs, SMB/SMI interrupt
service,
power-saving,
Suspend/Wakeup,
modularized hardware ID, and Auto LED Flash (ALF)
status display. Other features include hardware-driven
speaker alarm output and Suspend/Wakeup button.
As a Pentium class and x86-based system compatible
device, the OZ990 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.
07/13/00
Copyright 1998 by O2Micro
OZ990-SF-1.6
All Rights Reserved
Page 1




O2Micro

OZ990 Datasheet Preview

OZ990 Datasheet

Intelligent Manager Smart PMU/GPIO

No Preview Available !

PIN ASSIGNMENT
OZ990
SMBCLK
SMBDATA
PWRGD
MODE
PC[0] / GPIO[16]
PC[1] / GPIO[17]
PC[2] / GPIO[18]
PC[3] / GPIO[19]
GPIO[0] / SMIEVENT
GPIO[1] / WAKE
GPIO[2] / SMBALERT#
GPIO[3]
GPIO[4]
GND
1
2
3
4
5
6
7
8
9
10
11
12
13
14
28 VCC
27 32KHZ
26 RESETN
25 SRBTN # / GPIO[15]
24 GPIO[14]
23 GPIO[13]
22 GPIO[12]
21 GPIO[11]
20 GPIO[10]
19 GPIO[9]
18 GPIO[8]
17 SMBIDSEL[2] / GPO[7]
16 SMBIDSEL ]1] / GPO[6]
15 SMBIDSEL[0] / GPO [5]
PIN CONFIGURATION
Name
Pin No.
Type
Input
Drive
Definition
SMBCLK
1
I TTL
-
SMBus Clock Input
SMBDATA
SMBus Clock Input for SMBus protocol communication.
2 I/O TTL 12mA
SMBus Data Input/Output for SMBus protocol communication.
SMBus Data Input/Output
PWRGD
3
I TTL
-
Host System Power Good
MODE
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 OZ990 with the exception of the
Power Control pins. The state of the PWRGD pin determines whether the OZ990 is in PMU or Alternate
PMU mode when RESETN is active. When pin MODE=1 and pin PWRGD=0, the OZ990 is in PMU mode.
When pin MODE=1 and pin PWRGD=1, the OZ990 is in Alternate PMU mode.
4
I TTL
-
OZ990 Mode Input
PC[3:0]/
GPIO[19:16]
The OZ990 has 3 modes of operation: GPIO(with 20 GPIOs available), PMU(with 16 GPIOs available), and
Alternate PMU(with 16 GPIOs available). To use the OZ990 as a PMU, tie MODE pin to VDD and set
PWRGD LOW. For Alternate PMU mode, tie MODE pin to VDD and set PWRGD HIGH. For GPIO-only
mode, tie MODE pin LOW. Refer to MODE description for more details.
[8:5] I/O TTL 4mA
Power Control Outputs /
General Purpose I/Os
Pins PC[3:0]/GPIO[19:16] can be used as Power Control outputs for cold start, reset, Suspend, and Wakeup
or as regular GPIOs. Upon power up, if the OZ990 is in PMU mode, PC[3:0] will default to 0, with OZ990
initially in Suspend mode. By default, on a falling edge-triggered SRBTN#/GPIO[15] (with Wakeup function),
PC[3:0] will be set to 1 to power on the system. On a subsequent trigger of GPIO[15:8]s Suspend and
Wakeup functions, the values in PC_SUSPEND[3:0] and PC_WAKE[3:0] in register 0Bh will be copied onto
the PC[3:0] output pins. Additionally, the OZ990 provides a power sequencing feature that allows up to 8
different programmable values of staggering time for the PC[3:0] outputs. PC[3:0] are also programmable
just like the GPIO[19:16] pins but with bits PCI[3:0] in register 0Bh as input data and PCO[3:0] in register
0Ch as output data values.
GPIO[0]/
SMIEVENT
9
I/O TTL 4mA
General Purpose I/O /
SMIEVENT
Fully programmable GPIOs that can be used for a variety of dedicated or specific functions. Pin GPIO[0] has
SMIEVENT output as an alternate function. GPIO[0] defaults as outputs in PMU mode, and as input in
Alternate PMU and GPIO modes. It is also programmable to function as either GPI[0] input, GPO[0]output,
ALF[0] output, PWRON input, WAKE_DIS input, or ID[0] input(in Alternate PMU and GPIO modes). When
implementing as ID[0] input, GPIO[0]/SMIEVENT pin is internally latched from external pull-ups or pull-
downs, when RESETN is LOW. The values will be stored permanently in the ID Register and
GPIO[0]/SMIEVENT pin can then be reconfigured as an output. Refer to GPIO Config.1&2 Registers for
more details and GPIO Config. Tables for input/output selections.
OZ990-SF-1.6
Page 2


Part Number OZ990
Description Intelligent Manager Smart PMU/GPIO
Maker O2Micro
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OZ990 Datasheet PDF






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