Datasheet

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STM32F412xE/G Electrical characteristics
161
Note:
When VBUS sensing feature is enabled, PA9 should be left at their default state (floating
input), not as alternate function. A typical 200
µA current consumption of the embedded
sensing block (current to voltage conversion to determine the different sessions) can be
observed on PA9 when the feature is enabled.
Figure 45. USB OTG FS timings: definition of data signal rise and fall time
CAN (controller area network) interface
Refer to Section 6.3.16: I/O port characteristics for more details on the input/output alternate
function characteristics (CANx_TX and CANx_RX).
2. The USB OTG FS functionality is ensured down to 2.7 V but not the full USB full speed electrical
characteristics which are degraded in the 2.7-to-3.0 V V
DD
voltage range.
3. Guaranteed by design, not tested in production.
4.
R
L
is the load connected on the USB OTG FS drivers.
Table 70. 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, 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
ai14137
t
f
Differen tial
Data Lines
V
SS
V
CR S
t
r
Crossover
points
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