Transmit Packet Timing Parameters | Intel 82555 specification

82555 — Networking Silicon

11.4.4Transmit Packet Timing Parameters

	Symbol	Parameter	Conditions	Min	Typ	Max	Units


T15	TXEN_ST	TXC on first TXEN active to start	100 Mbps	10		12	bits
T15	TXEN_ST	of frame	100 Mbps	10		12	bits
T15a	TXEN_ST	TXC on first TXEN active to start	10 Mbps	3.5		5	bits
T15a	TXEN_ST	of frame	10 Mbps	3.5		5	bits
T16	TXEN_CRSH	TXC on first TXEN active to	100 Mbps			4	bits
T16	TXEN_CRSH	rising edge of CRS	100 Mbps			4	bits
		rising edge of CRS

T16a	TXEN_CRSH	TXC on first TXEN active to	10 Mbps			1.5	bits
T16a	TXEN_CRSH	rising edge of CRS	10 Mbps			1.5	bits
		rising edge of CRS

T17	TXEN_END	TXC on first TXEN inactive to	100 Mbps			17	bits
T17	TXEN_END	end of frame	100 Mbps			17	bits
T17a	TXEN_END	TXC on first TXEN inactive to	10 Mbps			5	bits
T17a	TXEN_END	end of frame	10 Mbps			5	bits
T18	TXEN_CRSL	TXC on first TXEN inactive to	100 Mbps			11	bits
T18	TXEN_CRSL	falling edge of CRS	100 Mbps			11	bits
		falling edge of CRS

T18a	TXEN_CRSL	TXC on first TXEN inactive to	10 Mbps			6	bits
T18a	TXEN_CRSL	falling edge of CRS	10 Mbps			6	bits
		falling edge of CRS

T19	TEOF	End of frame high time	10 Mbps	250		350	ns

TXCLK
TXEN	T16,T16a
	T16,T16a	T18,T18a
		T18,T18a
CRS
	T15,T15a	T17,T17a
	T15,T15a
Frame On link		Valid Frame Data
		Valid Frame Data

Figure 19. Transmit Frame Timing Parameters

11.4.5Squelch Test Timing Parameters

	Symbol	Parameter	Conditions	Min	Typ	Max	Units


T20	TSQE_DEL	Collision detect heartbeat delay	10 Mbps	7		8	bits
T21	TSQE_DUR	Collision detect heartbeat	10 Mbps	9		11	bits
T21	TSQE_DUR	duration	10 Mbps	9		11	bits

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Datasheet

Image 52

Intel 82555 manual Transmit Packet Timing Parameters, Squelch Test Timing Parameters

Contents

Product Features 82555 10/100 Mbps LAN Physical Layer Interface Networking Silicon Revision Description Contents Repeater Mode Functional Overview IntroductionCompliance to Industry Standards Networking Silicon 100 Mbps Mode Architectural Overview 10 Mbps Mode MII TX Interface Media Independent Interface MII Repeater mode only Transmit Error From RICYes Pin Definitions Pin Numbers and Labels Clock Pins Twisted Pair Ethernet TPE PinsMedia Independent Interface MII Pins Pin Types Media Access Control/Repeater Interface Control Pins LED Pins External Bias Pins Miscellaneous Control Pins VCC Power and Ground PinsVSS 100BASE-TX Adapter Mode Operation Symbol 5B Symbol Code 4B Nibble Code100BASE-TX Transmit Clock Generation 100BASE-TX Transmit Blocks 2 100BASE-TX Scrambler and MLT-3 Encoder Invalid NRZ to MLT-3 Encoding Diagram 3 100BASE-TX Transmit Framing Transmit Driver 100BASE-TX Receive BlocksVendor Model/Type 100BASE-TX Collision Detection 100BASE-TX Link Integrity and Auto-Negotiation Solution Combination Tx/T4 Auto-Negotiation SolutionLink Integrity Auto-Negotiation Adapter Mode Addresses Auto 10/100 Mbps Speed Selection Networking Silicon Datasheet 10BASE-T Functionality in Adapter Mode 10BASE-T Transmit Clock Generation10BASE-T Transmit Blocks 10BASE-T Receive Blocks 3 10BASE-T Error Detection and Reporting 10BASE-T Collision Detection10BASE-T Link Integrity 10BASE-T Jabber Control Function 10BASE-T Full Duplex Networking Silicon Datasheet Special Repeater Features Repeater ModeConnectivity Clock Signal Example Management Data Interface MDI Frame Structure Bits Name Description Default MDI RegistersMDI Registers 0 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 Bit Setting Technology Auto-Negotiation FunctionalityDescription Priority Technology Parallel Detect and Auto-Negotiation Priority Auto-Negotiation and Parallel Detect Networking Silicon Datasheet LED Descriptions Networking Silicon Datasheet Reset and Miscellaneous Test Modes ResetLoopback Scrambler Bypass Test Instruction Coding Number Code Test Instruction Select Input to Tout Electrical Specifications and Timing Parameters DC CharacteristicsAbsolute Maximum Ratings General Operating Conditions 11.3.3 100BASE-TX Voltage/Current DC Characteristics Total supply current 230 Leakage on analog pins MII Clock Specifications AC CharacteristicsSymbol 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