STM32F105xx, STM32F107xx
Electrical characteristics
Table 49 gives the list of Ethernet MAC signals for the RMII and Figure 27 shows the
corresponding timing diagram.
Figure 27. Ethernet RMII timing diagram
RMII_REF_CLK
td(TXEN)
td(TXD)
RMII_TX_EN
RMII_TXD[1:0]
tsu(RXD)
tsu(CRS)
tih(RXD)
tih(CRS)
RMII_RXD[1:0]
RMII_CRS_DV
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Table 49. Dynamics characteristics: Ethernet MAC signals for RMII
Symbol
Rating
Min
Typ
Max
Unit
tsu(RXD)
tih(RXD)
tsu(CRS)
tih(CRS)
td(TXEN)
td(TXD)
Receive data setup time
Receive data hold time
TBD
TBD
TBD
TBD
0
TBD
TBD
TBD
TBD
9.6
TBD
TBD
TBD
TBD
21.9
21
ns
ns
ns
ns
ns
ns
Carrier sense set-up time
Carrier sense hold time
Transmit enable valid delay time
Transmit data valid delay time
0
9.9
1. TBD stands for to be determined.
Table 50 gives the list of Ethernet MAC signals for MII and Figure 27 shows the
corresponding timing diagram.
Figure 28. Ethernet MII timing diagram
MII_RX_CLK
t
t
t
t
t
t
su(RXD)
su(ER)
su(DV)
ih(RXD)
ih(ER)
ih(DV)
MII_RXD[3:0]
MII_RX_DV
MII_RX_ER
MII_TX_CLK
t
t
d(TXEN)
d(TXD)
MII_TX_EN
MII_TXD[3:0]
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Doc ID 15274 Rev 4
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STMICROELECTRONICS [ ST ]
