Compaq SMA200 user manual SMBus, SMBALERT# Cmos, Smbdata Cmos, Smbclock Cmos

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DIGITAL-LOGIC AG

SMA200 Manual V1.0

5.4.7.SMBus

				On Module	Ext. Ter-	Max.		Matched
Signal	BUS	Type	Description	Termination	mination	Length	Ohm	Length
					Needed	in mm		in mm
SMB_ALERT#	CMOS	3.3V	Connect to the SMB device	PU 10k to	-	200	55	-
		In		3.3V
SMB_DATA	CMOS	3.3V	Connect to the SMB device	PU 4.7k to	-	200	55	-
		I/O	open drain	3.3V
SMB_CLOCK	CMOS	3.3V	Connect to the SMB device	PU 4.7k to	-	200	55	-
		I/O	open drain	3.3V

If the signals are not used:

The pins can stay open.

Remarks:

The SMB_ALERT# may be used to initiate an SMB event over APIC or an SMI.

Maximum BUS capacitance is 200pF. For higher BUS loads, the SMB repeater PCA9515 from Philips is recommended. Each new SMB segment must be terminated with 2x 4.7k.

EMV/EMI filters:

Are not needed.

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Contents SmartCore Express SMA200 SMA200 Manual About this Manual and How to Use ItInitial Version Table of Contents Environmental Protection Statement PrefaceTrademarks DisclaimerRecycling Information Limited Two Year WarrantyTechnical Support CE Conformity Explanation of SymbolsApplicable Documents and Standards RoHS Commitment For Your SafetyRoHS Compliant Production Process RoHS Compatible Product DesignWeee Application Swiss Association for Quality and Management Systems Swiss QualityOverview Standard FeaturesMathematics Coprocessor Technical SpecificationsSpecification Intel US15W Graphics Memory Controller Hub SpecificationPhysical Characteristics Specification Intel US15W SpecificationReset & Power Management Specification Power Supply SpecificationExamples of Ordering Codes Operating Environment SpecificationEMI / EMC IEC1131-2 refer MIL 461/462 Specification Options/AccessoriesBlock Diagram Dimensions & DiagramsDesign in with the smartModule Dimensions of the smartCoreExpress ModuleConnector Placement & Pin Definition on the Carrier Board Photo of the Top Side of the PCB Component Heights between Module and Carrier Board Dimensions of the Carrier Board ConnectorSignal Terminology Descriptions COM-EXPRESS Connector DescriptionSignal Description Type Remarks SmartCoreExpress Connector PinoutBUS on the smartCoreExpress Connectors a / B Pins Signal Type Remarks Pin SignalType Signal BUS TypeSignal Descriptions of the Smartcoreexpress Placing an AC Coupling Capacitor on each PCIe-TX PCI-Express SmartCoreExpress Signal GroupsSupported devices SdvoLvdsddcclk Lvdsddcdat LvdsLvdsclk + Lvdsvdden Lvdsbklctl Lvdsbklen Lvdsctlaclk Remarks EMV/EMI-filters USBOn Module Ext. Ter Max Matched USBRemarks EMV/EMI filters Parallel ATALPCFRAME# LPC BUSLpcserirq Smbclock Cmos SMBusSMBALERT# Cmos Smbdata CmosHDA Audio Interface If the signals are not used RemarksSupported Codecs EMV/EMI filters SD / Sdio Interface If the signals are not used Remarks EMV/EMI filtersSpimiso Spimosi Spiclk SPICS# Cmos SPI BUSSata Interface Option Lcirst LCI GlanGlantx + Glanrx + GLAN-CLK + LCICantx Cmos Can / SerialCanrx Cmos 14. PM Vccrtc PWR PWR PWR SupplyTyco / AMP SMARTCORE-EXPRESS Connector SpecificationsParameter Condition Specification Source on smartCore Part Name Part NumberSMARTCORE-EXPRESS Versus Comexpress Index Coprocessor Design Dimensions