Datasheet

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STM32F765xx STM32F767xx STM32F768Ax STM32F769xx Electrical characteristics
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USB high speed (HS) characteristics
Unless otherwise specified, the parameters given in Table 96 for ULPI are derived from
tests performed under the ambient temperature, f
HCLK
frequency summarized in Table 95
and V
DD
supply voltage conditions summarized in Table 94, with the following configuration:
• Output speed is set to OSPEEDRy[1:0] = 11, unless otherwise specified
• Capacitive load C = 20 pF, unless otherwise specified
• Measurement points are done at CMOS levels: 0.5V
DD
.
Refer to Section 5.3.20: I/O port characteristics for more details on the input/output
characteristics.
2.
Measured from 10% to 90% of the data signal. For more detailed informations, please refer to USB
Specification - Chapter 7 (version 2.0).
3. No external termination series resistors are required on DP (D+) and DM (D-) pins since the matching
impedance is included in the embedded driver.
Table 94. USB HS DC electrical characteristics
Symbol Parameter Min.
(1)
1. All the voltages are measured from the local ground potential.
Max.
(1)
Unit
Input level V
DD
USB OTG HS operating voltage 1.7 3.6 V
Table 95. USB HS clock timing parameters
(1)
1. Guaranteed by design.
Symbol Parameter Min Typ Max Unit
-
f
HCLK
value to guarantee proper operation of
USB HS interface
30 - - MHz
F
START_8BIT
Frequency (first transition) 8-bit ±10% 54 60 66 MHz
F
STEADY
Frequency (steady state) ±500 ppm 59.97 60 60.03 MHz
D
START_8BIT
Duty cycle (first transition) 8-bit ±10% 40 50 60 %
D
STEADY
Duty cycle (steady state) ±500 ppm 49.975 50 50.025 %
t
STEADY
Time to reach the steady state frequency and
duty cycle after the first transition
--1.4ms
t
START_DEV
Clock startup time after the
de-assertion of SuspendM
Peripheral - - 5.6
ms
t
START_HOST
Host - - -
t
PREP
PHY preparation time after the first transition
of the input clock
---µs
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