Intel 82540EP manual AC Characteristics

Page 27

Networking Silicon — 82540EP

4.4AC Characteristics

Table 9. AC Characteristics: 3.3 V Interfacing

Symbol	Parameter	Min	Typ	Max	Unit

PCICLK	Clock frequency in PCI mode			66	MHz

Table 10. 25 MHz Clock Input Requirements

Symbol	Parametera	Min	Typ	Max	Unit

fi_TX_CLK	TX_CLK_IN frequency	25 - 50 ppm	25	25 + 50	MHz
fi_TX_CLK	TX_CLK_IN frequency	25 - 50 ppm	25	ppm	MHz
				ppm

a.This parameter applies to an oscillator connected to the Crystal One (XTAL1) input. Alternatively, a crystal may be connected to XTAL1 and XTAL2 as the frequency source for the internal oscillator.

Table 11. Link Interface Clock Requirements

Symbol	Parameter	Min	Typ	Max	Unit

fGTXa	GTX_CLK frequency		125		MHz

a. GTX_CLK is used externally for test purposes only.

Table 12.	EEPROM Interface Clock Requirements

	Symbol		Parameter	Min	Typ		Max	Unit

	fSK					1		MHz

Table 13.	AC Test Loads for General Output Pins

	Symbol		Signal Name		Value		Units

	CL	TDO			10		pF

	CL	PME#, SDP[7:0]			16		pF

	CL	EE_DI, EE_SK			18		pF

	CL	RX_ACTIVITY, TX_ACTIVITY, LINK_UP			20		pF

Datasheet

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Contents Revision April 82540EP Gigabit Ethernet ControllerDatasheet Date Revision 82540EP Networking Silicon Contents 82540EP Networking Silicon Introduction Acpi LED MdioTX MAC RX MACDocument Scope Reference DocumentsProduct Code 82540EP Networking Silicon Application flexibility for LAN on Motherboard PCI FeaturesMAC Specific Features Features BenefitsHostOffloading PHY Specific FeaturesA server management processor Manageability FeaturesTechnology Features Additional Device FeaturesPCI Bus Interface Signal Type DefinitionsPCI Address, Data and Control Signals Symbol Type Name and FunctionTRDY# STS PARFRAME# STS IRDY# STSError Reporting Signals Arbitration SignalsInterrupt Signal System SignalsSMB Signals Eeprom and Serial Flash Interface SignalsPower Management Signals Impedance Compensation SignalsMiscellaneous Signals LED SignalsOther Signals Analog XTAL1XTAL2 Analog Supplies Test Interface SignalsPower Supply Connections Digital SuppliesCTRL15 Control SignalsGround and No Connects GNDRecommended Operating Conditions a Sheet 1 Absolute Maximum RatingsRecommended Operating Conditions Absolute Maximum RatingsaRecommended Operating Conditions a Sheet 2 DC SpecificationsDC Characteristics Power Specifications D0aPower Specifications D3cold Power Specifications Dr UninitializedPower Specifications Complete Subsystem O Characteristics Symbol Parameter Condition Min Typ Max= V SS AC Characteristics Tcyc Timing Specifications PCI Bus InterfaceSymbol Parameter a PCI 66 MHz PCI 33 MHz Units Min Max PCI Bus Interface Clock ParametersPCI Bus Interface Timing Parameters Symbol Parameter PCI 66MHz PCI 33 MHz Units Min MaxVTL Symbol Parameter PCI 66 MHz UnitPCI Bus Interface Timing Measurement Conditions VTHPin Inch max Point 1kΩ 10 pFInch max Point 50 pF Link Interface Timing Eeprom InterfaceRise and Fall Times Date Code Device Identification82540EP Product Name YywwPackage Information DatasheetThermal resistance, junction-to-ambient Thermal SpecificationsThermal Characteristics Symbol Parameter Value at specified airflow m/s UnitsPinout Information Eeprom and Serial Flash Interface Signals Power Management SignalsImpedance Compensation Signals SMB SignalsAnalog Power Signals PHY SignalsTest Interface Signals Digital Power SignalsLanpwrgood Smbclk Grounds and No Connect SignalsSignal Names in Pin Order Sheet 1 Signal Name PinCLKRUN# Smbdata GND Signal Names in Pin Order Sheet 2RST# SMBALRT# M66EN REQ# CBE3#Signal Names in Pin Order Sheet 3 IRDY# FRAME# CBE2# GNDCLK VIO TRDY# Zpcomp Signal Names in Pin Order Sheet 4 STOP# INTA# DEVSEL# ZncompPAR PERR# GNT# Signal Names in Pin Order Sheet 5 CBE1#CBE0# PCIAD5 GND PCIAD1 Clkview FLCE# Eesk Vddo P12 Signal Names in Pin Order Sheet 6PCIAD9 PCIAD7 PCIAD4 PCIAD8 PCIAD6 PCIAD3 PCIAD2 Eecs GND Flso EediC D E F G H J K L M N P Visual Pin Reference

4.4AC Characteristics

Table 10. 25 MHz Clock Input Requirements

25 + 50

MHz

ppm

Table 11. Link Interface Clock Requirements

AC Test Loads for General Output Pins

Datasheet