Datasheet

DS12110 Rev 5 195/231
STM32H743xI Electrical characteristics
199
Figure 59. ULPI timing diagram
Ethernet characteristics
Unless otherwise specified, the parameters given in Table 111, Table 112 and Table 113 for
SMI, RMII and MII are derived from tests performed under the ambient temperature,
f
rcc_c_ck
frequency summarized in Table 23: General operating conditions, with the following
configuration:
 Output speed
is set to OSPEEDRy[1:0] = 10
 Capacitive load C = 20 pF
 Measurement points are done at CMOS levels: 0.5V
DD
.
Refer to Section 6.3.15: I/O port characteristics for more details on the input/output
characteristics.
Table 111 gives the list of Ethernet MAC signals for the SMI and Figure 60 shows the
corresponding timing diagram.
Table 111. Dynamics characteristics: Ethernet MAC signals for SMI
(1)
1. Guaranteed by characterization results.
Symbol Parameter Min Typ Max Unit
t
MDC
MDC cycle time(2.5 MHz) 400 400 403
ns
T
d(MDIO)
Write data valid time 1 1.5 3
t
su(MDIO)
Read data setup time 8 - -
t
h(MDIO)
Read data hold time 0 - -
&ORFN
&RQWURO,Q
8/3,B',5
8/3,B1;7
GDWD,Q
ELW
&RQWURORXW
8/3,B673
GDWDRXW
ELW
W
''
W
'&
W
+'
W
6'
W
+&
W
6&
DLF
W
'&