STM32F769AI datasheet(191/255 Pages) STMICROELECTRONICS

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STM32F765xx STM32F767xx STM32F768Ax STM32F769xx

Electrical characteristics

224

USB high speed (HS) characteristics

Unless otherwise specified, the parameters given in Table 95 for ULPI are derived from

tests performed under the ambient temperature, fHCLK frequency summarized in Table 94

and VDD supply voltage conditions summarized in Table 93, 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: 0.5VDD.

Refer to Section 5.3.20: I/O port characteristics for more details on the input/output

characteristics.

1. Guaranteed by design.

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 93. 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

VDD

USB OTG HS operating voltage

1.7

3.6

Table 94. USB HS clock timing parameters(1)

1. Guaranteed by design.

Symbol

Parameter

Min

Typ

Max

Unit

fHCLK value to guarantee proper operation of

USB HS interface

MHz

FSTART_8BIT

Frequency (first transition)

8-bit ±10%

MHz

FSTEADY

Frequency (steady state) ±500 ppm

59.97

60.03

MHz

DSTART_8BIT

Duty cycle (first transition)

8-bit ±10%

DSTEADY

Duty cycle (steady state) ±500 ppm

49.975

50.025

tSTEADY

Time to reach the steady state frequency and

duty cycle after the first transition

1.4

tSTART_DEV

Clock startup time after the

de-assertion of SuspendM

Peripheral

5.6

tSTART_HOST

Host

tPREP

PHY preparation time after the first transition

of the input clock

μs

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