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CD00253742 Datasheet, PDF (100/120 Pages) STMicroelectronics – XL-density performance line ARM-based 32-bit MCU
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Electrical characteristics
STM32F103xF, STM32F103xG
Table 60. USB DC electrical characteristics
Symbol
Parameter
Conditions
Min.(1) Max.(1) Unit
Input levels
VDD
VDI(4)
VCM(4)
VSE(4)
USB operating voltage(2)
Differential input sensitivity
I(USBDP, USBDM)
Differential common mode range Includes VDI range
Single ended receiver threshold
3.0(3)
3.6
V
0.2
0.8
2.5
V
1.3
2.0
Output levels
VOL Static output level low
VOH Static output level high
RL of 1.5 kΩ to 3.6 V(5)
RL of 15 kΩ to VSS(5)
2.8
0.3
V
3.6
1. All the voltages are measured from the local ground potential.
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. 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 VDD voltage range.
4. Guaranteed by characterization, not tested in production.
5. RL is the load connected on the USB drivers
Figure 54. USB timings: definition of data signal rise and fall time
Differen tial
data lines
Crossover
points
VCR S
VS S
tf
tr
ai14137
Table 61.
USB: full-speed electrical characteristics
Driver characteristics(1)
Symbol
Parameter
Conditions
Min
Max
Unit
tr
Rise time(2)
tf
Fall Time(2)
CL = 50 pF
4
CL = 50 pF
4
20
ns
20
ns
trfm Rise/ fall time matching
tr/tf
90
110
%
VCRS Output signal crossover voltage
1.3
2.0
V
1. Guaranteed by design, not tested in production.
2. Measured from 10% to 90% of the data signal. For more detailed informations, please refer to USB
Specification - Chapter 7 (version 2.0).
5.3.18
CAN (controller area network) interface
Refer to Section 5.3.14: I/O port characteristics for more details on the input/output alternate
function characteristics (CAN_TX and CAN_RX).
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