Electrical characteristics
STM32F302xx/STM32F303xx
Table 65.
Symbol
USB: Full-speed electrical characteristics(1)
Parameter
Conditions
Min
Typ
Max
Unit
Driver characteristics
tr
tf
Rise time(2)
Fall time(2)
CL = 50 pF
CL = 50 pF
tr/tf
4
4
-
-
-
-
20
20
ns
ns
%
V
trfm
VCRS
Rise/ fall time matching
90
1.3
110
2.0
Output signal crossover voltage
Output driver
Impedance(3)
ZDRV
driving high and low
28
40
44
Ω
1. Guaranteed by design, not tested in production.
Measured from 10% to 90% of the data signal. For more detailed informations, please refer to USB Specification - Chapter
7 (version 2.0).
2.
3. No external termination series resistors are required on USB_DP (D+) and USB_DM (D-), the matching impedance is
already included in the embedded driver.
CAN (controller area network) interface
Refer to Section 6.3.14: I/O port characteristics for more details on the input/output alternate
function characteristics (CAN_TX and CAN_RX).
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STMICROELECTRONICS [ ST ]
