Download Intel IXF1104 User's Manual

Intel® IXF1104 4-Port Gigabit Ethernet Media Access Controller
7.4
GMII AC Timing Specification
7.4.1
1000 Base-T Operation
Figure 38 and Figure 39 and Table 49 and Table 50 provide GMII AC timing specifications.
7.4.1.1
1000 BASE-T Transmit Interface
Figure 38. 1000BASE-T Transmit Interface Timing
GTX_CLK
TXEn
t1
t2
TXD[7:0]
TXER
t3
CPS
t4
B0634-01
Table 49. GMII 1000BASE-T Transmit Signal Parameters
Symbol
Parameter
Min
Typ1
Max
Unit2
t1
TXD[7:0], TXEN, TXER Set-up to TXC High
2.5
–
–
ns
t2
TXD[7:0], TXEN, TXER Hold from TXC High
0.5
–
–
ns
t3
TXEN sampled to CRS asserted
–
–
16
BT
t4
TXEN sampled to CRS de-asserted
–
–
16
BT
1. Typical values are at 25oC and are for design aid only; not guaranteed and not subject to production
testing.
2. Bit Time (BT) is the duration of one bit as transferred to/from the PHY and is the reciprocal of bit rate. BT for
1000BASE-T = 10-9 or 1 ns.
Datasheet
Document Number: 278757
Revision Number: 009
Revision Date: 27-Oct-2005
142