STR750FXX_09 Datasheet, PDF (70/84 Pages) STMicroelectronics – 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

Electrical parameters
STR750Fxx STR751Fxx STR752Fxx STR755Fxx
6.3.11
USB characteristics
The USB interface is USB-IF certified (Full Speed).
Table 42. USB startup time
Symbol
Parameter
Conditions
Max
Unit
t_STARTUP
USB transceiver startup time
1
µs
Table 43. USB characteristics
USB DC Electrical Characteristics
Symbol
Parameter
Conditions
Min.⁽¹⁾⁽²⁾ Max.⁽¹⁾⁽²⁾ Unit
Input Levels
V_DI
Differential Input Sensitivity
V_CM
Differential Common Mode
Range
I(DP, DM)
Includes V_DI range
0.2
0.8
2.5
V
V_SE
Single Ended Receiver
Threshold
1.3
2.0
Output Levels
V_OL
Static Output Level Low
R_L of 1.5 kΩ to 3.6V⁽³⁾
0.3
V
V_OH
Static Output Level High
R_L of 15 kΩ to V_SS(3)
2.8
3.6
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
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.
3. R_L is the load connected on the USB drivers
Figure 41. USB: data signal rise and fall time
Differential
Data Lines
V_CRS
Crossover
points
V_SS
t_f
t_r
Table 44. USB: Full speed electrical characteristics
Symbol
Parameter
Conditions
Min
Max
Unit
Driver characteristics:
t_r
Rise time⁽¹⁾
C_L=50 pF
4
20
ns
t_f
Fall Time¹⁾
C_L=50 pF
4
20
ns
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