Intel 82540EP manual Link Interface Timing, Eeprom Interface, Rise and Fall Times

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82540EP — Networking Silicon

4.5.2Link Interface Timing

Table 17. Rise and Fall Times

Symbol	Parameter	Condition	Min	Max	Unit

TR	Clock rise time	0.8 V to 2.0 V	0.7		ns

TF	Clock fall time	2.0 V to 0.8 V	0.7		ns

TR	Data rise time	0.8 to 2.0 V	0.7		ns

TF	Data fall time	2.0 V to 0.8 V	0.7		ns

Figure 9. Link Interface Rise/Fall Timing

2.0V

0.8V

TRTF

4.5.3EEPROM Interface

Table 18. Link Interface Clock Requirements

Symbol	Parameter	Min	Typ	Max	Unit

TPW	EE_SK pulse width		TPERIOD*128		ns

a. The EEPROM clock is derived from a 125 MHz internal clock.

Table 19. Link Interface Clock Requirements

Symbol	Parametera	Min	Typ	Max	Unit

TDOS	EE_DO setup time	TCYC*2			ns

TDOH	EE_DO hold time	0			ns

26TheEE_DOsetupandholdtimeisafunctionofthePCIbusCLKcycletimebutisreferencedtoDatasheetO_EE_SK.

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Contents 82540EP Gigabit Ethernet Controller Revision AprilDatasheet Date Revision 82540EP Networking Silicon Contents 82540EP Networking Silicon Introduction Mdio TX MACRX MAC Acpi LEDProduct Code Document ScopeReference Documents 82540EP Networking Silicon PCI Features MAC Specific FeaturesFeatures Benefits Application flexibility for LAN on MotherboardPHY Specific Features HostOffloadingManageability Features A server management processorAdditional Device Features Technology FeaturesSignal Type Definitions PCI Address, Data and Control SignalsSymbol Type Name and Function PCI Bus InterfacePAR FRAME# STSIRDY# STS TRDY# STSArbitration Signals Interrupt SignalSystem Signals Error Reporting SignalsEeprom and Serial Flash Interface Signals Power Management SignalsImpedance Compensation Signals SMB SignalsOther Signals Miscellaneous SignalsLED Signals XTAL2 AnalogXTAL1 Test Interface Signals Power Supply ConnectionsDigital Supplies Analog SuppliesControl Signals Ground and No ConnectsGND CTRL15Absolute Maximum Ratings Recommended Operating ConditionsAbsolute Maximum Ratingsa Recommended Operating Conditions a Sheet 1DC Specifications DC CharacteristicsPower Specifications D0a Recommended Operating Conditions a Sheet 2Power Specifications Complete Subsystem Power Specifications D3coldPower Specifications Dr Uninitialized = V SS O CharacteristicsSymbol Parameter Condition Min Typ Max AC Characteristics Timing Specifications PCI Bus Interface Symbol Parameter a PCI 66 MHz PCI 33 MHz Units Min MaxPCI Bus Interface Clock Parameters TcycSymbol Parameter PCI 66MHz PCI 33 MHz Units Min Max PCI Bus Interface Timing ParametersSymbol Parameter PCI 66 MHz Unit PCI Bus Interface Timing Measurement ConditionsVTH VTLInch max Point 50 pF PinInch max Point 1kΩ 10 pF Rise and Fall Times Link Interface TimingEeprom Interface Device Identification 82540EP Product NameYyww Date CodeDatasheet Package InformationThermal Specifications Thermal CharacteristicsSymbol Parameter Value at specified airflow m/s Units Thermal resistance, junction-to-ambientPinout Information Power Management Signals Impedance Compensation SignalsSMB Signals Eeprom and Serial Flash Interface SignalsPHY Signals Test Interface SignalsDigital Power Signals Analog Power SignalsGrounds and No Connect Signals Signal Names in Pin Order Sheet 1Signal Name Pin Lanpwrgood SmbclkSignal Names in Pin Order Sheet 2 RST# SMBALRT#M66EN REQ# CBE3# CLKRUN# Smbdata GNDCLK VIO TRDY# Zpcomp Signal Names in Pin Order Sheet 3IRDY# FRAME# CBE2# GND PAR PERR# GNT# Signal Names in Pin Order Sheet 4STOP# INTA# DEVSEL# Zncomp CBE0# PCIAD5 GND PCIAD1 Clkview FLCE# Eesk Signal Names in Pin Order Sheet 5CBE1# Signal Names in Pin Order Sheet 6 PCIAD9 PCIAD7 PCIAD4PCIAD8 PCIAD6 PCIAD3 PCIAD2 Eecs GND Flso Eedi Vddo P12Visual Pin Reference C D E F G H J K L M N P