Electrical characteristics
STM32F405xx, STM32F407xx
Table 65. Dynamic 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
2
1
-
-
-
ns
ns
ns
ns
ns
ns
-
-
Carrier sense set-up time
Carrier sense hold time
0.5
2
-
-
-
Transmit enable valid delay time
Transmit data valid delay time
8
9.5
10
11
11.5
8.5
Table 66 gives the list of Ethernet MAC signals for MII and Figure 48 shows the
corresponding timing diagram.
Figure 49. 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]
ai15668
(1)
Table 66. Dynamic characteristics: Ethernet MAC signals for MII
Symbol
Parameter
Min
Typ
Max
Unit
tsu(RXD)
tih(RXD)
tsu(DV)
tih(DV)
Receive data setup time
Receive data hold time
Data valid setup time
Data valid hold time
9
10
9
-
-
-
8
-
ns
tsu(ER)
tih(ER)
td(TXEN)
td(TXD)
Error setup time
6
-
Error hold time
8
-
Transmit enable valid delay time
Transmit data valid delay time
0
10
10
14
15
0
1. Data based on characterization results, not tested in production.
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