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OZ998
Intelligent Manager
Smart Multi-DIMM Selector
FEATURES
* * * * * * * * * * * * * * * * *
SMBus, version 1.0, compliant Intel PAS Protected Storage support Support Pentium and x86-based designs Support SMBus Q-Buffering via PWRGD Support SMBus selector for dual/triple DIMMs 32KHZ input clock or Crystal input Support 2 different power planes 10 bytes scratch pad registers 20 possible edge-sensitive programmable GPIOs per device 8 possible Open Drain, Open Collector outputs Programmable addresses for cascaded OZ998S Supports 3.3V or 5V operation Supports 5V tolerant LVTTL inputs (OZ998B) LOW power hardware-driven speaker alarm outputs SMBALERT# and SMI event outputs 8 programmable interrupt inputs for SMI event or SMBALERT# 8 Auto LED Flash (ALF) programmable outputs with 10% or 50% duty cycles
GENERAL DESCRIPTION
O2Micro's OZ998 Multi-DIMM Selector supports the switching between a primary SMBus and 3 other secondary SMBus. This function is particularly useful for DIMM devices and the support of Intel's PAS (Preboot Authentication Service). In addition, the OZ998 can be configured to support two different power planes with different sets of General Purpose Input/Output (GPIO) signals, which supplements and enhances the power management capability of the chipsets, commonly found in an ACPI (Advanced Configuration of Power Interface) subsystem. Up to 20 possible GPIOs are available per device, and among those, GPIO[15:8] are programmable to be either positive or negative-edged triggers to generate an SMIEVENT/SMBALERT# to the system. GPIO[7:0] are programmable to be either a regular TTL level output, open drain or open collector output. To support over 20 GPIOs through cascading multiple OZ998 devices, configure each individual OZ998 device ID. Up to 8 Auto LED Flash (ALF) are available to drive an LED or speaker at a programmable frequency. The OZ998 is packaged in a low profile, small 28 pin SSOP.
ORDERING INFORMATION
OZ998S - 28 pin SSOP
07/13/00 (c)Copyright 2000 by O2Micro
OZ998-SF-2.2 All Rights Reserved
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OZ998
PIN DIAGRAM
OZ998
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] GPIO[2]/SMBALERT#/ID[2] GPIO[3]/ID[3] GPIO[4]/ID[4] GND 1 2 3 4 5 6 7 8 9 10 11 12 13 14 28 27 26 25 24 23 22 21 20 19 18 17 16 15 VCC XIN/32KHZ XOUT GPIO[15]/S_SMBCLK3 GPIO[14]/S_SMBDATA3 GPIO[13]/SMB_SEL[1] GPIO[12]/SMB_SEL[0] GPIO[11] GPIO[10] GPIO[9] GPIO[8] GPIO[7]/ID[7] GPIO[6]/ID[6] GPIO[5]/ID[5]
OZ998-SF-2.2
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OZ998
PIN DESCRIPTION
Name P_SMBCLK P_SMBDATA PWRGD Pin Type Input Drive Definition No. Primary SMBus Clock Input 1 I 3.3V/5V Ext-PU Primary SMBus Clock Input for SMBus protocol communication. Primary SMBus Data I/O 2 I/O 3.3V/5V Ext-PU 12mA Primary SMBus Data Input/Output for SMBus protocol communication. Host System Power Good 3 I TTL 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. Reset 4 I TTL This active low pin will reset the OZ998. General Purpose I/O/ 5 I/O TTL 4mA 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. General Purpose I/O/ 6 I/O TTL 4mA 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. General Purpose I/O/ 7 I/O TTL 4mA 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. General Purpose I/O / 8 I/O TTL 4mA 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. General Purpose I/O / 9 I/O TTL 12mA 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. General Purpose I/O 10 I/O TTL 12mA 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. General Purpose I/O/ 11 I/O TTL 12mA 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.
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]
GPIO[2]/ SMBALERT#/ID[2]
OZ998-SF-2.2
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OZ998
Name GPIO[7:3]/ID[7:3] Definition Pin No. Type Input Drive General Purpose I/Os [17:15], I/O TTL 12mA [13:12] Fully programmable GPIOs that can be used for a variety of dedicated or specific functions. GPIO[7:3] pins default as inputs. They are programmable to function as GPI[7:3] inputs, GPO[7:3] outputs, ALF[7:3] outputs, or ID[7:3] inputs. 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 input/output selections. General Purpose I/Os [20:18] I/O TTL 4mA Fully programmable GPIOs that can be used for a variety of dedicated or specific functions. Pins GPIO[10:8] default as inputs. Pins GPIO[10:8] as inputs are programmable to generate SMI/SMB interrupts. They are also programmable to function as GPI[10:8] inputs, GPO[10:8] outputs. Refer to GPIO Config.1&2 Registers for more details and GPIO Config. Tables (section 8) for input/output selections. General Purpose I/O 21 I/O TTL 4mA Fully programmable GPIO that can be used for a variety of dedicated or specific functions. Pin GPIO[11] is default as input. Pin GPIO[11] as input is programmable to generate SMI/SMB interrupts. They are also programmable to function as GPI[11] input, GPO[11] output. Refer to GPIO Config.1&2 Registers for more details and GPIO Config. Tables (section 8) for input/output selections. General Purpose I/O / 22 I/O TTL 4mA Secondary SMBus Select 0 Fully programmable GPIO that can be used for a variety of dedicated or specific functions. By default, GPIO[12] becomes SMB_SEL[0] input to be used to select Secondary SMBus. Pin GPIO[12] default as input. Pin GPIO[12] as input is programmable to generate SMI/SMB interrupts. It is also programmable to function as GPI[12] input, GPO[12] output. Refer to GPIO Config.1&2 Registers for more details and GPIO Config. Tables (section 8) for input/output selections. SMB_SEL[1:0] 00 01 10 11 GPIO[13]/ SMB_SEL[1] 23 I/O Selected Secondary SMBus None Secondary SMBus-1 Secondary SMBus-2 Secondary SMBus-3 TTL 4mA
GPIO[10:8]
GPIO[11]
GPIO[12]/ SMB_SEL[0]
GPIO[14]/ S_SMBDATA3
GPIO[15]/ S_SMBCLK3
XOUT XIN/32KHZ GND VCC
General Purpose I/O / Secondary SMBus Select 1 Fully programmable GPIO that can be used for a variety of dedicated or specific functions. On default, GPIO[13] becomes SMB_SEL[1] input to be used to select Secondary SMBus. Pin GPIO[13] default as input. Pin GPIO[13], as input is programmable to generate SMI/SMB interrupts. It is also programmable to function as GPI[13] input, GPO[13] output. Refer to GPIO Config.1&2 Registers for more details and GPIO Config. Tables (section 8) for input/output selections. General Purpose I/O / 24 I/O TTL 4mA Secondary SMBus-3 Data I/O Fully programmable GPIO that can be used for a variety of dedicated or specific functions. Pin GPIO[14] default as input. Pin GPIO[14], as input is programmable to generate SMI/SMB interrupts. It is also programmable to function as GPI[14] input, GPO[14] outputs or secondary SMBus-3 Data Input/Output. Refer to GPIO Config.1&2 Registers for more details and GPIO Config. Tables (section 8) for input/output selections. General Purpose I/O / 25 I/O TTL 4mA Secondary SMBus-3 Clock I/O Fully programmable GPIO that can be used for a variety of dedicated or specific functions. Pin GPIO[15] default as input. Pin GPIO[15], as input is programmable to generate SMI/SMB interrupts. It is also programmable to function as GPI[15] input, GPO[15] output or secondary SMBus-3 Clock Input/Output. Refer to GPIO Config.1&2 Registers for more details and GPIO Config. Tables (section 8) for input/output selections. XOUT Output 26 O Crystal output pin. See application diagram on p.18. XIN Input/32KHZ 27 I TTL 32KHZ input clock source. Crystal input pin as alternate. See application diagram on p.18. Ground 14 GND Ground. 3.3V/5V Power Supply 28 PWR 3.3V or 5V Power Supply.
OZ998-SF-2.2
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OZ998
DC CHARACTERISTICS
DC TABLE FOR VCC = 5.0V r 10%
Symbol VCC VIH VIl VOH VOL IIL IOL Parameter Power Supply Voltage Input HIGH Voltage Input LOW Voltage Output HIGH Voltage Output LOW Voltage Maximum Input Leakage Current Maximum Output Leakage Min 4.5 2.0 2.4 -10 -10 Max 5.5 0.8 0.4 10 10 Units V V V V V A A
DC TABLE FOR VCC = 3.3V r 10%
Symbol VCC VIH VIl VOH VOL IIL IOL Parameter Power Supply Voltage Input HIGH Voltage Input LOW Voltage Output HIGH Voltage Output LOW Voltage Maximum Input Leakage Current Maximum Output Leakage Min 3.0 2.0 2.4 -10 -10 Max 3.6 0.8 0.4 10 10 Units V V V V V A A
CAPACITANCE
Symbol CIN COUT CIO Parameter Maximum Input Capacitance Maximum Output Capacitance Maximum I/O Capacitance 0 qC to 70qC 10 10 10 Units pF pF pF
ABSOLUTE MAXIMUM RATINGS
Symbol VCC VIN, VOUT IIN TSTG TOPER| Parameter DC Power Supply Voltage DC Input, Output Voltage DC Current Drain VCC and VCC Pins Storage Temperature Operation Temperature Value -0.3 to 5.5 -0.3 to VCC + 0.3 25 -40 to +125 0 to 70 Units V V mA C C
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OZ998
ICC SPECIFICATIONS
Symbol ICC5V Parameter Supply Current, VCC = 5V (when 32KHZ input clock source is used) Supply Current, VCC = 3.3V (when 32KHZ input clock source is used) Supply Current, VCC = 5V (when external OSC is used based on configuration on p.18) Supply Current, VCC = 3.3V (when external OSC is used based on configuration on p.18) Typ 8 Max 15 Units A A A A
ICC3V
5
10
ICC5V
150
200
ICC3V
50
80
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OZ998
13. OZ998 PACKAGE INFORMATION
DIM
E
H
SSOP PACKAGE (209 mil)
e D A B D A1 L C
A A1 B C D E e H L
INCHES MIN MAX 0.084 0.002 0.010 0.009 0.015 0.004 0.008 0.390 0.413 0.197 0.220 0.0256 0.291 0.323 0.025 0.041 0 8
MILLIMETERS MIN MAX 2.13 0.05 0.25 0.22 0.38 0.09 0.20 9.90 10.50 5.00 5.60 0.65 7.40 8.20 0.63 1.03 0 8
OZ998-SF-2.2
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