Datasheet

STM32F405xx, STM32F407xx Electrical characteristics
Doc ID 022152 Rev 2 117/167
Table 6 3 gives the list of Ethernet MAC signals for the RMII and Figure 45 shows the
corresponding timing diagram.
Figure 45. Ethernet RMII timing diagram
Table 6 4 gives the list of Ethernet MAC signals for MII and Figure 45 shows the
corresponding timing diagram.
Figure 46. Ethernet MII timing diagram
Table 63. Dynamics characteristics: Ethernet MAC signals for RMII
Symbol Rating Min Typ Max Unit
t
su(RXD)
Receive data setup time 2 - - ns
t
ih(RXD)
Receive data hold time 1 - - ns
t
su(CRS)
Carrier sense set-up time 0.5 - - ns
t
ih(CRS)
Carrier sense hold time 2 - - ns
t
d(TXEN)
Transmit enable valid delay time 8 9.5 11 ns
t
d(TXD)
Transmit data valid delay time 8.5 10 11.5 ns
RMII_REF_CLK
RMII_TX_EN
RMII_TXD[1:0]
RMII_RXD[1:0]
RMII_CRS_DV
t
d(TXEN)
t
d(TXD)
t
su(RXD)
t
su(CRS)
t
ih(RXD)
t
ih(CRS)
ai15667
MII_RX_CLK
MII_RXD[3:0]
MII_RX_DV
MII_RX_ER
t
d(TXEN)
t
d(TXD)
t
su(RXD)
t
su(ER)
t
su(DV)
t
ih(RXD)
t
ih(ER)
t
ih(DV)
ai15668
MII_TX_CLK
MII_TX_EN
MII_TXD[3:0]