STM32F103XC datasheet(105/143 Pages) STMICROELECTRONICS

105 / 143 page

DS5792 Rev 13

105/143

STM32F103xC, STM32F103xD, STM32F103xE

Electrical characteristics

135

Figure 56. USB timings: definition of data signal rise and fall time

Table 57. USB DC electrical characteristics

Symbol

Parameter

Conditions

Min.(1)

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

Max.(1)

Unit

Input levels

VDD

USB operating voltage(2)

2. To be compliant with the USB 2.0 full-speed electrical specification, the USB_DP (D+) pin should be pulled

up with a 1.5 k

Ω resistor to a 3.0-to-3.6 V voltage range.

-3.0(3)

3. The STM32F103xC/D/E USB functionality is ensured down to 2.7 V but not the full USB electrical

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

3.6

VDI(4)

4. Guaranteed by characterization results.

Differential input sensitivity

I(USB_DP, USB_DM)

0.2

VCM(4)

Differential common mode range Includes VDI range

0.8

2.5

VSE(4)

Single ended receiver threshold

1.3

2.0

Output levels

VOL

Static output level low

RL of 1.5 kΩ to 3.6 V(5)

5. RL is the load connected on the USB drivers

-0.3

VOH

Static output level high

RL of 15 kΩ to VSS(5)

2.8

3.6

Table 58. USB: full-speed electrical characteristics

Driver characteristics(1)

1. Guaranteed by design.

Symbol

Parameter

Conditions

Min

Max

Unit

Rise time(2)

2. Measured from 10% to 90% of the data signal. For more detailed informations, please refer to USB

Specification - Chapter 7 (version 2.0).

CL = 50 pF

420

Fall Time(2)

CL = 50 pF

trfm

Rise/ fall time matching

tr/tf

110

VCRS

Output signal crossover voltage

1.3

2.0

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