Intel IXF1104 manual 7.9Transmit Pause Control AC Timing Specification, Datasheet

IXF1104 4-Port Gigabit Ethernet Media Access Controller

7.9Transmit Pause Control AC Timing Specification

Figure 49 and Table 55 show the pause control AC timing specifications. The Pause Control interface operates as an asynchronous interface relative to the main system clock (CLK125). There is, however, a relationship between the TXPAUSEADD bus and the strobe signal (TXPAUSEFR).

Figure 49. Pause Control Interface Timing

		TxPauseAdd[1:0]TXPAUSEADD[2:0]
		TxPauseFr
000	Tsu(min) = 16 ns	Tpw(min) = 16 ns	Thold(min) = 16 ns
	: XON packet on all ports
001	: XOFF Port0
010	: XOFF Port1
011	: XOFF Port2
100	: XOFF Port3
110-101 : Reserved
111	: XOFF on all ports

Table 55. Transmit Pause Control Interface Timing Parameters

Symbol	Parameter	Min	Max	Units
Tsu	TXPAUSEADD stable prior to TXPAUSEFR High	16	–	ns
Tpw	TXPAUSEFR pulse width	16	–	ns
Thold	TXPAUSEADD stable after TXPAUSEFR High	16	–	ns

150 Datasheet

Document Number: 278757

Revision Number: 007

Revision Date: March 25, 2004