STM32F103C8T7XXX datasheet(73/116 Pages) STMICROELECTRONICS

73 / 116 page

DS5319 Rev 18

73/116

STM32F103x8, STM32F103xB

Electrical characteristics

115

Figure 36. USB timings: definition of data signal rise and fall time

5.3.17

CAN (controller area network) interface

Refer to Section 5.3.12 for more details on the input/output alternate function characteristics

(CAN_TX and CAN_RX).

Table 44. 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 USBDP (D+) pin must be pulled up

with a 1.5 kΩ resistor to a 3.0 to 3.6 V voltage range.

3.0(3)

3. The STM32F103xx 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. Specified by design, not tested in production.

Differential input sensitivity

I(USBDP, USBDM)

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 45. USB: Full-speed electrical characteristics(1)

1. Specified by design, not tested in production.

Symbol

Parameter

Conditions

Min

Max

Unit

Driver characteristics

Rise time(2)

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

Section 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

ai14137b

Cross over

points

Differential

data lines

VCRS

VSS

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