ST7SCR_07 datasheet(89/101 Pages) STMICROELECTRONICS

Teilenummer	ST7SCR

Bauteilbeschribung	8-BIT LOW-POWER, FULL-SPEED USB MCU WITH 16K FLASH, 768 RAM, SMARTCARD I/F, TIMER

PDF	101 Pages

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Hersteller	STMICROELECTRONICS [STMicroelectronics]

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ST7SCR

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14.8 COMMUNICATION INTERFACE CHARACTERISTICS

14.8.1 USB - Universal Bus Interface

Notes: RL is the load connected on the USB drivers. All the voltages are measured from the local ground

potential.

Figure 43. USB: Data Signal Rise and Fall Time

Note 1: Measured from 10% to 90% of the data signal. For more detailed informations, please refer to

Chapter 7 (Electrical) of the USB specification (version 1.1).

USB DC Electrical Characteristics

Parameter

Symbol

Conditions

Min.

Max.

Unit

Input Levels:

Differential Input Sensitivity

VDI

I(D+, D-)

0.2

Differential Common Mode Range

VCM

Includes VDI range

0.8

2.5

Single Ended Receiver Threshold

VSE

1.3

2.0

Output Levels

Static Output Low

VOL

RL of 1.5K ohms to 3.6v

0.3

Static Output High

VOH

RL of 15K ohm to VSS

2.8

3.6

USBVCC: voltage level

USBV

VDD=5v

3.00

3.60

USB: Full speed electrical characteristics

Parameter

Symbol

Conditions

Min

Max

Unit

Driver characteristics:

Rise time

Note 1,CL=50 pF

Fall Time

Note 1, CL=50 pF

Rise/ Fall Time matching

trfm

tr/tf

110

Output signal Crossover

Voltage

VCRS

1.3

2.0

Differential

Data Lines

VSS

Crossover

points

VCRS

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