Datasheet

Electrical characteristics STM32F745xx STM32F746xx
166/227 DocID027590 Rev 4
Ethernet characteristics
Unless otherwise specified, the parameters given in Table 85, Table 86 and Table 87 for
SMI, RMII and MII are derived from tests performed under the ambient temperature, f
HCLK
frequency summarized in
Table 17 and V
DD
supply voltage conditions summarized in
Table 85, 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 5.3.17: I/O port characteristics for more details on the input/output
characteristics.
Table 85 gives the list of Ethernet MAC signals for the SMI (station management interface)
and Figure 55 shows the corresponding timing diagram.
Figure 55. Ethernet SMI timing diagram
Table 84. Dynamic characteristics: USB ULPI
(1)
Symbol Parameter Conditions Min. Typ. Max. Unit
t
SC
Control in (ULPI_DIR, ULPI_NXT) setup time - 3 - -
ns
t
HC
Control in (ULPI_DIR, ULPI_NXT) hold time - 1 - -
t
SD
Data in setup time - 1.5 - -
t
HD
Data in hold time - 0.5 - -
t
DC
/t
DD
Data/control output delay
2.7 V < V
DD
< 3.6 V,
C
L
= 20 pF and
OSPEEDRy[1:0] = 11
-5.59
--
5.5 11.5
1.7 V < V
DD
< 3.6 V,
C
L
= 15 pF and
OSPEEDRy[1:0] = 11
-
1. Guaranteed by characterization results.
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