Figure 8-4. GMII transmit & receive timing
8.5 TBI Timing (Host Interface)
The 4450 supports the 802.3-2002 standard specifications. For TBI MAC and PHY modes,
the 4450 can operate with 0.05ns less than the IEEE 802.3 specification requirements. All
other timing numbers match the 802.3 specification.
Table 8-6. TBI Timing
Mode
Rise Time
(max)
Fall Time
(max)
Input Signals
Output Signals
Setup
Hold
Setup
Hold
MAC
PHY
1.00
1.00
2.45 ns
1.95 ns
1.45 ns
0.95 ns
2.00 ns
2.50 ns
1.00 ns
1.50 ns
1.00
1.00
4450 – Data Sheet, DS-0131-06
Page74
Hifn Confidential