STMicroelectronics STM32L151QCH6, Manual

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STM32L151xC/C-A STM32L152xC/C-A Electrical characteristics
113
USB characteristics
The USB interface is USB-IF certified (full speed).
Figure 24. USB timings: definition of data signal rise and fall time
Table 50. 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 51. 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 52. 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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