STM32F102X8 datasheet(65/80 Pages) STMICROELECTRONICS

65 / 80 page

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STM32F102x8, STM32F102xB

Electrical characteristics

Figure 30. USB timings: definition of data signal rise and fall time

5.3.17

12-bit ADC characteristics

Unless otherwise specified, the parameters given in Table 47 are derived from tests

performed under ambient temperature, fPCLK2 frequency and VDDA supply voltage

conditions summarized in Table 8.

Note:

It is recommended to perform a calibration after each power-up.

Table 43. 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 STM32F102xx 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 design, not tested in production.

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 44. USB: Full speed electrical characteristics of the driver(1)

1. Guaranteed by design, not tested in production.

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

ai14137

Differen tial

Data L ines

VSS

VCRS

Crossover

points

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