Datasheet

Table Of Contents
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STM32F405xx, STM32F407xx Electrical characteristics
Ethernet characteristics
Unless otherwise specified, the parameters given in Table 64, Table 65 and Table 66 for
SMI, RMII and MII are derived from tests performed under the ambient temperature, f
HCLK
frequency summarized in Tabl e 14 and VDD supply voltage conditions summarized in
Table 63, with the following configuration:
Output speed is set to OSPEEDRy[1:0] = 10
Capacitive load C = 30 pF
Measurement points are done at CMOS levels: 0.5V
DD
.
Refer to Section 5.3.16: I/O port characteristics for more details on the input/output
characteristics.
Table 64 gives the list of Ethernet MAC signals for the SMI (station management interface)
and Figure 46 shows the corresponding timing diagram.
Figure 46. Ethernet SMI timing diagram
Table 65 gives the list of Ethernet MAC signals for the RMII and Figure 47 shows the
corresponding timing diagram.
Table 63. Ethernet DC electrical characteristics
Symbol Parameter Min.
(1)
1. All the voltages are measured from the local ground potential.
Max.
(1)
Unit
Input level V
DD
Ethernet operating voltage 2.7 3.6 V
Table 64. Dynamic characteristics: Eternity MAC signals for SMI
(1)
1. Guaranteed by characterization.
Symbol Parameter Min Typ Max Unit
t
MDC
MDC cycle time(2.38 MHz) 411 420 425
ns
T
d(MDIO)
Write data valid time 6 10 13
t
su(MDIO)
Read data setup time 12 - -
t
h(MDIO)
Read data hold time 0 - -
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