Intel 82555 guide

82555 — Networking Silicon

	Symbol	Parameter	Conditions	Min	Typ	Max	Units


T26a	TR_CRSL	End of receive frame to falling	10 Mbps			4.5	bits
T26a	TR_CRSL	edge of CRS	10 Mbps			4.5	bits
T27	TR_RXDVL	End of receive frame to falling	100 Mbps			12	bits
T27	TR_RXDVL	edge of RXDV	100 Mbps			12	bits
		edge of RXDV

T27a	TR_RXDVL	End of receive frame to falling	10 Mbps			4	bits
T27a	TR_RXDVL	edge of RXDV	10 Mbps			4	bits
		edge of RXDV

R X C L K

R X D V

T25,T25a

T24,T24a

C R S

Frame On link

T27,T27a

T26,T26a

Valid Frame Data

Figure 22. Receive Packet Timing Parameters

11.4.810BASE-T Normal Link Pulse (NLP) Timing Parameters

Symbol

Parameter

Conditions

Min

Typ

Max

Units

T28

TNLP_WID

NLP width

10 Mbps

100

ns

T29

TNLP_PER

NLP period

10 Mbps

8

24

ms

T29

Normal Link Pulse

T28

Figure 23. Normal Link Pulse Timing Parameters

11.4.9Auto-Negotiation Fast Link Pulse (FLP) Timing Parameters

	Symbol	Parameter	Conditions	Min	Typ	Max	Units


T30	TFLP_WID	FLP width (clock/data)			100		ns
T31	TFLP_CLK_CLK	Clock pulse to clock pulse period		111	125	139	μs
T32	TFLP_CLK_DAT	Clock pulse to data pulse period		55.5	62.5	69.5	μs

50

Datasheet

Image 54

Intel 82555 manual 11.4.8 10BASE-T Normal Link Pulse NLP Timing Parameters

Contents

Product Features 82555 10/100 Mbps LAN Physical Layer Interface Networking Silicon Revision Description Contents Repeater Mode Introduction Functional OverviewCompliance to Industry Standards Networking Silicon 100 Mbps Mode Architectural Overview 10 Mbps Mode MII TX Interface Media Independent Interface MII Transmit Error From RIC Repeater mode onlyYes Pin Definitions Pin Numbers and Labels Media Independent Interface MII Pins Clock PinsTwisted Pair Ethernet TPE Pins Pin Types Media Access Control/Repeater Interface Control Pins LED Pins External Bias Pins Miscellaneous Control Pins Power and Ground Pins VCCVSS 100BASE-TX Transmit Clock Generation 100BASE-TX Adapter Mode OperationSymbol 5B Symbol Code 4B Nibble Code 100BASE-TX Transmit Blocks 2 100BASE-TX Scrambler and MLT-3 Encoder Invalid NRZ to MLT-3 Encoding Diagram 3 100BASE-TX Transmit Framing 100BASE-TX Receive Blocks Transmit DriverVendor Model/Type 100BASE-TX Collision Detection Link Integrity 100BASE-TX Link Integrity and Auto-Negotiation SolutionCombination Tx/T4 Auto-Negotiation Solution Auto-Negotiation Adapter Mode Addresses Auto 10/100 Mbps Speed Selection Networking Silicon Datasheet 10BASE-T Transmit Blocks 10BASE-T Functionality in Adapter Mode10BASE-T Transmit Clock Generation 10BASE-T Receive Blocks 10BASE-T Link Integrity 3 10BASE-T Error Detection and Reporting10BASE-T Collision Detection 10BASE-T Jabber Control Function 10BASE-T Full Duplex Networking Silicon Datasheet Repeater Mode Special Repeater FeaturesConnectivity Clock Signal Example Management Data Interface MDI Frame Structure MDI Registers 0 Bits Name Description DefaultMDI Registers Transition Register 1 Status Register Bit Definitions 10BASE-T Register 2 82555 Identifier Register Bit Definitions MDI Registers 8 MDI Registers 16 Register 17 82555 Special Control Bit Definitions 100BASE-TX 150 Register 22 Receive Symbol Error Counter Bit Definitions Actled Liled Description Bit Setting TechnologyAuto-Negotiation Functionality Priority Technology Parallel Detect and Auto-Negotiation Priority Auto-Negotiation and Parallel Detect Networking Silicon Datasheet LED Descriptions Networking Silicon Datasheet Loopback Reset and Miscellaneous Test ModesReset Scrambler Bypass Test Instruction Coding Number Code Test Instruction Select Input to Tout Absolute Maximum Ratings Electrical Specifications and Timing ParametersDC Characteristics General Operating Conditions 11.3.3 100BASE-TX Voltage/Current DC Characteristics Total supply current 230 Leakage on analog pins AC Characteristics MII Clock SpecificationsSymbol Parameter Conditions Min Typ Max Units MII Timing Parameters MII Clocks AC Timing Repeater Mode Timing Parameters RXC tri-stated a Transmit Packet Timing Parameters Squelch Test Timing Parameters Jabber Timing Parameters Receive Packet Timing Parameters 11.4.8 10BASE-T Normal Link Pulse NLP Timing Parameters Auto-Negotiation Fast Link Pulse FLP Timing Parameters Reset Timing Parameters 11.4.11 X1 Clock Specifications 11.4.12 100BASE-TX Transmitter AC Specification X1 Clock Specifications Symbol Description Min Norm Max 12.0 82555 Package Information 10.0