Datasheet

Electrical characteristics STM32F302x6 STM32F302x8
100/138 DocID025147 Rev 7
USB characteristics
Figure 30. USB timings: definition of data signal rise and fall time
Table 63. USB startup time
Symbol Parameter Max Unit
t
STARTUP
(1)
1. Guaranteed by design.
USB transceiver startup time 1 µs
Table 64. 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.
Differential input sensitivity I(USB_DP, USB_DM) 0.2 -
VV
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
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SRLQWV
'LIIHUHQWLDO
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9
&56
966
WI WU
Table 65. USB: Full-speed electrical characteristics
(1)
Symbol Parameter Conditions Min Typ Max Unit
Driver characteristics
t
r
Rise time
(2)
C
L
= 50 pF 4 - 20 ns
t
f
Fall time
(2)
C
L
= 50 pF 4 - 20 ns
t
rfm
Rise/ fall time matching t
r
/t
f
90 - 110 %
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