Electrical characteristics
STM32F103xx
Figure 22. USB timings: definition of data signal rise and fall time
Crossover
points
Differential
Data Lines
V
CR S
V
SS
t
t
r
f
ai14137
Table 38.
Symbol
USB: Full speed electrical characteristics
Parameter
Conditions
Min
Max
Unit
Driver characteristics
tr
tf
Rise time(1)
Fall Time(1)
CL = 50 pF
CL = 50 pF
tr/tf
4
4
20
20
ns
ns
%
V
trfm
Rise/ fall time matching
90
1.3
110
2.0
VCRS
Output signal crossover voltage
Measured from 10% to 90% of the data signal. For more detailed informations, please refer to USB
Specification - Chapter 7 (version 2.0).
1.
5.3.16
CAN (controller area network) interface
Refer to I/O port characteristics for more details on the input/output alternate function char-
acteristics (CANTX and CANRX).
5.3.17
12-bit ADC characteristics
Unless otherwise specified, the parameters given in Table 39 are derived from tests
performed under ambient temperature, f
frequency and V
supply voltage
PCLK2
DDA
conditions summarized in Table 7.
Note:
It is recommended to perform a calibration after each power-up.
(1)
Table 39. ADC characteristics
Symbol
Parameter
Conditions
Min
2.4V
2.0
Typ
Max
3.6V
VDDA
Unit
V
VDDA ADC power supply
VREF+ Positive reference voltage
V
fADC
fS
ADC clock frequency
Sampling rate
0.6
14
MHz
TBD
0.05
1
MHz
kHz
823
17
fTRIG
VAIN
External trigger frequency
Conversion voltage range(2)
fADC = 14 MHz
1/fADC
V
VSSA
VDDA
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STMICROELECTRONICS [ ST ]
