Intel 82555 manual Repeater Mode Timing Parameters, RXC tri-stated a

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Networking Silicon — 82555

RXCLK

	RXD[3:0],				T 9					T 1 0
	RXD[3:0],	Data Invalid				Data Valid					Data Invalid
	RXER,RXDV	Data Invalid				Data Valid					Data Invalid
	RXER,RXDV

Figure 16. MII Receive Timing Parameters

M D C

MDIO (Input)

MDIO (Output)

Data Invalid

T13

Data Invalid

T11 T12

Data Valid

Data Valid

Data Invalid

Data Invalid

Figure 17. MII Timing Parameters: MDC/MDIO

11.4.3Repeater Mode Timing Parameters

	Symbol	Parameter	Conditions	Min	Typ	Max	Units


T14	TRDRV	PORTEN assertion to RXD[3:0],		1.5		2.5	RXC
T14	TRDRV	RXDV, and RXERR (RXC driven)		1.5		2.5	clocks
		PORTEN de-assertion to					RXC
T15	TRTST	RXD[3:0], RXDV, and RXERR		1.5		2.5	RXC
T15	TRTST	RXD[3:0], RXDV, and RXERR		1.5		2.5	clocks
		(RXC tri-stated)a					clocks

a. RXC, RXDV, and RXERR are tri-stated only after they have been driven low (0).

PORTEN

T14

T15

RXD[3:0],

RXER,RXDV,

RXCLK

Signal Driven

Figure 18. PORT Enable Timing

Datasheet

47

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Contents 82555 10/100 Mbps LAN Physical Layer Interface Product FeaturesRevision Description Networking SiliconContents Repeater Mode Introduction Functional OverviewCompliance to Industry Standards Networking Silicon Architectural Overview 100 Mbps ModeMII TX Interface 10 Mbps ModeMedia Independent Interface MII Transmit Error From RIC Repeater mode onlyYes Pin Numbers and Labels Pin DefinitionsPin Types Clock PinsTwisted Pair Ethernet TPE Pins Media Independent Interface MII PinsMedia Access Control/Repeater Interface Control Pins External Bias Pins LED PinsMiscellaneous Control Pins Power and Ground Pins VCCVSS 100BASE-TX Transmit Blocks 100BASE-TX Adapter Mode OperationSymbol 5B Symbol Code 4B Nibble Code 100BASE-TX Transmit Clock GenerationInvalid 2 100BASE-TX Scrambler and MLT-3 Encoder3 100BASE-TX Transmit Framing NRZ to MLT-3 Encoding Diagram100BASE-TX Receive Blocks Transmit DriverVendor Model/Type 100BASE-TX Collision Detection Auto-Negotiation 100BASE-TX Link Integrity and Auto-Negotiation SolutionCombination Tx/T4 Auto-Negotiation Solution Link IntegrityAuto 10/100 Mbps Speed Selection Adapter Mode AddressesNetworking Silicon Datasheet 10BASE-T Receive Blocks 10BASE-T Functionality in Adapter Mode10BASE-T Transmit Clock Generation 10BASE-T Transmit Blocks10BASE-T Jabber Control Function 3 10BASE-T Error Detection and Reporting10BASE-T Collision Detection 10BASE-T Link Integrity10BASE-T Full Duplex Networking Silicon Datasheet Repeater Mode Special Repeater FeaturesConnectivity Clock Signal Example MDI Frame Structure Management Data InterfaceTransition Bits Name Description DefaultMDI Registers MDI Registers 010BASE-T Register 1 Status Register Bit DefinitionsRegister 2 82555 Identifier Register Bit Definitions MDI Registers 16 MDI Registers 8100BASE-TX Register 17 82555 Special Control Bit Definitions150 Actled Liled Register 22 Receive Symbol Error Counter Bit DefinitionsPriority Technology Bit Setting TechnologyAuto-Negotiation Functionality DescriptionPriority Parallel Detect and Auto-NegotiationAuto-Negotiation and Parallel Detect Networking Silicon Datasheet LED Descriptions Networking Silicon Datasheet Scrambler Bypass Reset and Miscellaneous Test ModesReset LoopbackNumber Code Test Instruction Select Input to Tout Test Instruction CodingGeneral Operating Conditions Electrical Specifications and Timing ParametersDC Characteristics Absolute Maximum RatingsTotal supply current 230 Leakage on analog pins 11.3.3 100BASE-TX Voltage/Current DC CharacteristicsAC Characteristics MII Clock SpecificationsSymbol Parameter Conditions Min Typ Max Units MII Clocks AC Timing MII Timing ParametersRXC tri-stated a Repeater Mode Timing ParametersSquelch Test Timing Parameters Transmit Packet Timing ParametersReceive Packet Timing Parameters Jabber Timing ParametersAuto-Negotiation Fast Link Pulse FLP Timing Parameters 11.4.8 10BASE-T Normal Link Pulse NLP Timing Parameters11.4.11 X1 Clock Specifications Reset Timing ParametersX1 Clock Specifications 11.4.12 100BASE-TX Transmitter AC Specification12.0 82555 Package Information Symbol Description Min Norm Max10.0