DocID024995 Rev 4
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STM32L100RC
96
USB characteristics
The USB interface is USB-IF certified (full speed).
Figure 20. USB timings: definition of data signal rise and fall time
Table 49. 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 50. 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
-
3.0
3.6
V
V
DI
(2)
2.
Guaranteed by characterization results, not tested in production.
Differential input sensitivity
I(USB_DP, USB_DM)
0.2
-
V
V
CM
(2)
Differential common mode range Includes V
DI
range
0.8
2.5
V
SE
(2)
Single ended receiver threshold
-
1.3
2.0
Output levels
V
OL
(3)
3.
Guaranteed by test in production.
Static output level low
R
L
of 1.5
k
Ω
to 3.6 V
(4)
4.
R
L
is the load connected on the USB drivers.
-
0.3
V
V
OH
(3)
Static output level high
R
L
of 15
k
Ω
to V
SS
(4)
2.8
3.6
Table 51. USB: full speed electrical characteristics
Driver characteristics
(1)
Symbol
Parameter
Conditions
Min
Max
Unit
t
r
Rise time
(2)
C
L
= 50 pF
4
20
ns
t
f
Fall Time
(2)
C
L
= 50 pF
4
20
ns
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http://www.vicor.top/
021-31660491