Datasheet

Electrical characteristics STM32F103x8, STM32F103xB
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Figure 28. USB timings: definition of data signal rise and fall time
5.3.16 CAN (controller area network) interface
Refer to Section 5.3.12: I/O port characteristics for more details on the input/output alternate
function characteristics (CANTX and CANRX).
Table 42. 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 USBDP (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 STM32F103xx 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 I(USBDP, USBDM) 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
Table 43. USB: Full-speed electrical characteristics
(1)
1. Guaranteed by design, not tested in production.
Symbol Parameter Conditions Min Max Unit
Driver characteristics
t
r
Rise time
(2)
2.
Measured from 10% to 90% of the data signal. For more detailed informations, please 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