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Electrical characteristics STM32F105xx, STM32F107xx
72/104 DocID15274 Rev 7
Ethernet characteristics
Table 48 showns the Ethernet operating voltage.
Table 49 gives the list of Ethernet MAC signals for the SMI (station management interface)
and Figure 31 shows the corresponding timing diagram.
Figure 31. Ethernet SMI timing diagram
Table 50 gives the list of Ethernet MAC signals for the RMII and Figure 32 shows the
corresponding timing diagram.
Table 47. USB OTG FS electrical characteristics
(1)
1. Guaranteed by design, not tested in production.
Driver characteristics
Symbol Parameter Conditions Min Max Unit
t
r
Rise time
(2)
2.
Measured from 10% to 90% of the data signal. For more detailed informations, please refer to USB
Specification - Chapter 7 (version 2.0).
C
L
= 50 pF 420ns
t
f
Fall time
(2)
C
L
= 50 pF 4 20 ns
t
rfm
Rise/ fall time matching t
r
/t
f
90 110 %
V
CRS
Output signal crossover voltage - 1.3 2.0 V
Table 48. 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 3.0 3.6 V
Table 49. Dynamic characteristics: Ethernet MAC signals for SMI
Symbol Rating Min Typ Max Unit
t
MDC
MDC cycle time (1.71 MHz, AHB = 72 MHz) 583 583.5 584 ns
t
d(MDIO)
MDIO write data valid time 13.5 14.5 15.5 ns
t
su(MDIO)
Read data setup time 35 - - ns
t
h(MDIO)
Read data hold time 0 - - ns
ETH_MDC
ETH_MDIO(O)
ETH_MDIO(I)
t
MDC
t
d(MDIO)
t
su(MDIO)
t
h(MDIO)
ai15666c