OZ998 Datasheet, PDF (3/7 Pages) List of Unclassifed Manufacturers – Intelligent Manager Smart Multi-DIMM Selector

OZ998
PIN DESCRIPTION
Name
P_SMBCLK
P_SMBDATA
PWRGD
RESET#
GPIO[16]/
S_SMBCLK1
GPIO[17]/
S_SMBDATA1
GPIO[18]/
S_SMBCLK2
GPIO[19]/
S_SMBDATA2
GPIO[0]/
SMIEVENT/ID[0]
GPIO[1]/ID[1]
Pin
Type
Input
Drive
Definition
No.
1
I
3.3V/5V Ext-PU
-
Primary SMBus Clock Input
Primary SMBus Clock Input for SMBus protocol communication.
2
I/O
3.3V/5V Ext-PU 12mA
Primary SMBus Data I/O
Primary SMBus Data Input/Output for SMBus protocol communication.
3
I
TTL
-
Host System Power Good
This pin indicates that the host system’s power, including the Core Logic chipsets, is stable. Before the
host system’s power is stable, this input pin will tri-state the output pins, GPO[19:8], from OZ998 while
GPO[7:0] will maintain its original value. Upon PWRGD going Low, the Secondary SMBus will be
disconnected from the Primary SMBus.
4
I
TTL
-
Reset
This active low pin will reset the OZ998.
5
I/O
TTL
4mA
General Purpose I/O/
Secondary SMBus-1 Clock I/O
Fully programmable GPIO that can be used for a variety of dedicated or specific functions. Pin GPIO[16] is
defaulted as an input. It is programmable to function as GPI[16] input, GPO[16] output or secondary
SMBus-1 Clock Input/Output. Refer to GPIO[19:16] Config.1&2 Registers for more details and GPIO
Config. Tables (section 8) for input/output selections.
6
I/O
TTL
4mA
General Purpose I/O/
Secondary SMBus-1 Data I/O
Fully programmable GPIO that can be used for a variety of dedicated or specific functions. Pin GPIO[17] is
defaulted as an input. It is programmable to function as GPI[17] input, GPO[17] output or secondary
SMBus-1 Data Input/Output. Refer to GPIO[19:16] Config.1&2 Registers for more details and GPIO Config.
Tables (section 8) for input/output selections.
7
I/O
TTL
4mA
General Purpose I/O/
Secondary SMBus-2 Clock I/O
Fully programmable GPIO that can be used for a variety of dedicated or specific functions. Pin GPIO[18] is
defaulted as an input. It is programmable to function as GPI[18] input, GPO[18] output or secondary
SMBus-2 Clock Input/Output. Refer to GPIO[19:16] Config.1&2 Registers for more details and GPIO
: Config. Tables (section 8) for input/output selections. Note: OZ998A GPIO [19:18] need 47k pull-up for
normal operation, OZ998B doesn’t.
8
I/O
TTL
4mA
General Purpose I/O /
Secondary SMBus-2 Data I/O
Fully programmable GPIO that can be used for a variety of dedicated or specific functions. Pin GPIO[19] is
defaulted as an input. It is programmable to function as GPI[19] input, GPO[19] output or secondary
SMBus-2 Data Input/Output. Refer to GPIO[19:16] Config.1&2 Registers for more details and GPIO Config.
: Tables (section 8) for input/output selections. Note: OZ998A GPIO [19:18] need 47k pull-up for normal
operation, OZ998B doesn’t.
9
I/O
TTL
12mA
General Purpose I/O /
SMIEVENT
Fully programmable GPIO that can be used for a variety of dedicated or specific functions. Pin GPIO[0] has
an SMIEVENT output as an alternate function. GPIO[0] is set as default. It is also programmable to
function as GPI[0] input, GPO[0] output, ALF[0] output, or ID[0] input. In addition, if this pin is configured as
output, TTL output, Open Drain or Open collector output can be selected. Refer to GPIO Config.1&2
Registers for more details and GPIO Config. Tables (section 8) for input/output selections.
10
I/O
TTL
12mA
General Purpose I/O
GPIO[2]/
SMBALERT#/ID[2]
Fully programmable GPIO that can be used for a variety of dedicated or specific functions. GPIO[1] pin
defaults as input. It is also programmable to function as GPI[1] input, GPO[1] output, ALF[1] output, or ID[1]
input. In addition, if this pin is configured as output, TTL output, Open Drain or Open collector output can
be selected. Refer to GPIO Config.1&2 Registers for more details and GPIO Config. Tables (section 8) for
input/output selections.
11
I/O
TTL
12mA
General Purpose I/O/
SMBALERT#
Fully programmable GPIO that can be used for a variety of dedicated or specific functions. Pin GPIO[2]
defaults as input. This pin, when programmed as an alternate function, can generate the SMBALERT#
interrupt. SMBALERT# is an interrupt service request signal to the SMBus Host which can be generated by
all devices connected to the OZ998. Pin GPIO[2]/SMBALERT# is also programmable to function as GPI[2]
input, GPO[2] output, ALF[2] output, or ID[2] input. In addition, if this pin is configured as output, TTL
output, Open Drain or Open collector can be selected. Refer to GPIO Config.1&2 Registers for more
details and GPIO Config. Tables (section 8) for I/O selections.
OZ998-SF-2.2
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