Ref_Clk
TxEn
Tsu
Thld
DATA1
DATA2
DATAN
TXD[1:0]
Figure 8-2. RMII Transmit Signal Timing
Ref_Clk
CRS_RDV
RXD[1:0]
Thld
Tdelay
DATA1
DATA2
DATAN
Figure 8-3. RMII Receive Signal Timing
8.4 GMII Timing (Host Interface)
The 4450 supports the 802.3-2002 standard specifications.
Table 8-5. GMII Mode I/O Timing
Mode
Rise Time
(max)
Fall Time
(max)
Input Signals
Output Signals
Setup
Hold
Setup
Hold
0.50 ns
0.50 ns
MAC
PHY
1.00 ns
1.00 ns
1.00 ns
1.00 ns
2.00 ns
2.00 ns
0.00 ns
0.00 ns
2.50 ns
2.50 ns
4450 – Data Sheet, DS-0131-06
Page73
Hifn Confidential