STM32F427AI datasheet(151/240 Pages) STMICROELECTRONICS

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DS9405 Rev 12

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STM32F427xx STM32F429xx

Electrical characteristics

197

USB OTG full speed (FS) characteristics

This interface is present in both the USB OTG HS and USB OTG FS controllers.

Note:

When the VBUS sensing feature is enabled, PA9 and PB13 should be left at their default

state (floating input), not as alternate function. A typical 200 µA current consumption of the

sensing block (current-to-voltage conversion to determine the different sessions) can be

observed on PA9 and PB13 when the feature is enabled.

Table 66. USB OTG full speed startup time

Symbol

Parameter

Max

Unit

tSTARTUP(1)

1. Specified by design.

USB OTG full speed transceiver startup time

µs

Table 67. USB OTG full speed DC electrical characteristics

Symbol

Parameter

Conditions

Min.(1)

1. All the voltages are measured from the local ground potential.

Typ. Max.(1) Unit

Input

levels

VDD

USB OTG full speed

transceiver operating

voltage

3.0(2)

2. The USB OTG full speed transceiver functionality is ensured down to 2.7 V but not the full USB full speed

electrical characteristics, which are degraded in the 2.7-to-3.0 V VDD voltage range.

-3.6

VDI(3)

3. Specified by design.

Differential input sensitivity

I(USB_FS_DP/DM,

USB_HS_DP/DM)

0.2

VCM(3)

Differential common mode

range

Includes VDI range

0.8

2.5

VSE(3)

Single ended receiver

threshold

1.3

2.0

Output

levels

VOL Static output level low

RL of 1.5 kΩ to 3.6 V(4)

4. RL is the load connected on the USB OTG full speed drivers.

0.3

VOH Static output level high

RL of 15 kΩ to VSS(4)

2.8

3.6

RPD

PA11, PA12, PB14, PB15

(USB_FS_DP/DM,

USB_HS_DP/DM)

VIN = VDD

kΩ

PA9, PB13

(OTG_FS_VBUS,

OTG_HS_VBUS)

0.65

1.1

2.0

RPU

PA12, PB15 (USB_FS_DP,

USB_HS_DP)

VIN = VSS

1.5

1.8

2.1

PA9, PB13

(OTG_FS_VBUS,

OTG_HS_VBUS)

VIN = VSS

0.25

0.37

0.55

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