str755fvx STMicroelectronics, str755fvx Datasheet - Page 63

• Manufacturer Part Number: str755fvx
• Description: Arm7tdmi-s, 32-bit Mcu With Flash, Smi, 3 Std 16-bit Timers Pwm Timer, Fast 10-bit Adc, I2c, Uart, Ssp, Usb And Can
• Manufacturer: STMicroelectronics

STR750F
3.3.11
USB characteristics
The USB interface is USB-IF certified (Low Speed and High Speed).
Table 38.
1. All the voltages are measured from the local ground potential.
2. It is important to be aware that the DP/DM pins are not 5 V tolerant. As a consequence, in case of a a
3. R
Figure 29. USB: data signal rise and fall time
Table 39.
1. Measured from 10% to 90% of the data signal. For more detailed informations, please refer to USB
Symbol
Symbol
shortcut with Vbus (typ: 5.0V), the protection diodes of the DP/DM pins will be direct biased . This will not
damage the device if not more than 50 mA is sunk for longer than 24 hours but the reliability may be
affected.
V
Specification - Chapter 7 (version 2.0).
V
V
V
V
V
t
L
CRS
rfm
CM
OH
t
t
SE
OL
DI
r
f
is the load connected on the USB drivers
V
V
SS
Data Lines
Differential
CRS
Output signal Crossover Voltage
USB characteristics
USB: Full speed electrical characteristics
Differential Input Sensitivity
Differential Common Mode
Static Output Level High
Static Output Level Low
Single Ended Receiver
Rise/ Fall Time matching
Parameter
Threshold
Rise time
Parameter
Fall Time
Range
t
f
USB DC Electrical Characteristics
Crossover
(1)
1)
points
Driver characteristics:
Output Levels
Input Levels
t
r
R
R
L
Includes V
L
Conditions
of 1.5 k
of 15 k
C
C
Conditions
L
L
I(DP, DM)
=50 pF
=50 pF
t
r
/t
f
Ω
Ω
DI
to 3.6V
to V
range
SS
(3)
(3)
Min
1.3
90
4
4
Min.
Electrical parameters
0.2
1.3
2.8
0.8
(1)(2)
Max
110
2.0
20
20
Max.
2.5
2.0
0.3
3.6
(1)(2)
Unit
ns
ns
%
V
63/71
Unit
V
V