Datasheet

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STM32F37xxx Electrical characteristics
114
6.3.23 USB characteristics
Table 71. USB startup time
Symbol Parameter Max Unit
t
STARTUP
(1)
1. Guaranteed by design, not tested in production.
USB transceiver startup time 1 µs
Table 72. USB DC electrical characteristics
Symbol Parameter Conditions Min.
(1)
1. All the voltages are measured from the local ground potential.
Max.
(1)
Unit
Input levels
V
DD
USB operating voltage
(2)
2. To be compliant with the USB 2.0 full-speed electrical specification, the USB_DP (D+) pin should be pulled
up with a 1.5 kΩ resistor to a 3.0-to-3.6 V voltage range.
3.0
(3)
3. The STM32F3xxx USB functionality is ensured down to 2.7 V but not the full USB electrical characteristics
which are degraded in the 2.7-to-3.0 V V
DD
voltage range.
3.6 V
V
DI
(4)
4. Guaranteed by design, not tested in production.
Differential input sensitivity (for
USB compliance)
I(USB_DP, USB_DM) 0.2 -
V
V
CM
(4)
Differential common mode range Includes V
DI
range 0.8 2.5
V
SE
(4)
Single ended receiver threshold 1.3 2.0
Output levels
V
OL
Static output level low R
L
of 1.5 kΩ to 3.6 V
(5)
5.
R
L
is the load connected on the USB drivers
-0.3
V
V
OH
Static output level high R
L
of 15 kΩ to V
SS
(5)
2.8 3.6