Datasheet

Electrical characteristics STM32F427xx STM32F429xx
156/239 DocID024030 Rev 10
Table 72 gives the list of Ethernet MAC signals for the RMII and Figure 48 shows the
corresponding timing diagram.
Figure 48. Ethernet RMII timing diagram
Table 73 gives the list of Ethernet MAC signals for MII and Figure 48 shows the
corresponding timing diagram.
DLE
50,,B5()B&/.
50,,B7;B(1
50,,B7;'>@
50,,B5;'>@
50,,B&56B'9
W
G7;(1
W
G7;'
W
VX5;'
W
VX&56
W
LK5;'
W
LK&56
Table 72. Dynamics characteristics: Ethernet MAC signals for RMII
(1)
Symbol Parameter Condition Min Typ Max Unit
t
su(RXD)
Receive data setup time
1.71 V < V
DD
< 3.6 V
1.5 - -
ns
t
ih(RXD)
Receive data hold time 0 - -
t
su(CRS)
Carrier sense setup time 1 - -
t
ih(CRS)
Carrier sense hold time 1 - -
t
d(TXEN)
Transmit enable valid delay
time
2.7 V < V
DD
< 3.6 V 8 10.5 12
1.71 V < V
DD
< 3.6 V 8 10.5 14
t
d(TXD)
Transmit data valid delay time
2.7 V < V
DD
< 3.6 V 8 11 12.5
1.71 V < V
DD
< 3.6 V 8 11 14.5
1. Guaranteed by characterization results.
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