STM32F105xx, STM32F107xx
Electrical characteristics
Table 47.
USB OTG FS electrical characteristics(1)
Driver characteristics
Conditions
Symbol
Parameter
Min
Max
Unit
tr
tf
Rise time(2)
Fall time(2)
CL = 50 pF
CL = 50 pF
tr/tf
4
4
20
20
ns
ns
%
V
trfm
VCRS
Rise/ fall time matching
Output signal crossover voltage
90
1.3
110
2.0
1. Guaranteed by design, not tested in production.
Measured from 10% to 90% of the data signal. For more detailed informations, please refer to USB
Specification - Chapter 7 (version 2.0).
2.
Ethernet characteristics
Table 48 showns the Ethernet operating voltage.
Table 48. Ethernet DC electrical characteristics
Symbol
Input level
Parameter
Min.(1)
Max.(1)
Unit
VDD
Ethernet operating voltage
3.0
3.6
V
1. All the voltages are measured from the local ground potential.
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
t
MDC
ETH_MDC
t
d(MDIO)
ETH_MDIO(O)
t
t
su(MDIO)
h(MDIO)
ETH_MDIO(I)
ai15666c
Table 49. Dynamic characteristics: Ethernet MAC signals for SMI
Symbol
Rating
Min
Typ
Max
Unit
tMDC
MDC cycle time (1.71 MHz, AHB = 72 MHz)
583
13.5
35
583.5
14.5
584
ns
ns
ns
ns
td(MDIO) MDIO write data valid time
tsu(MDIO) Read data setup time
th(MDIO) Read data hold time
15.5
0
Table 50 gives the list of Ethernet MAC signals for the RMII and Figure 32 shows the
corresponding timing diagram.
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