Atmel Evaluation Kit AT91SAM9G25-EK AT91SAM9G25-EK データシート

1053

SAM9G25 [DATASHEET]

11032C–ATARM–25-Jan-13

Input Levels

V

IL

Low Level

0.8

V

V

IH

High Level

2.0

V

V

DI

Differential Input Sensitivity

|(D+) - (D-)|

0.2

V

V

CM

Differential Input Common 
Mode Range

0.8

2.5

V

C

IN

Transceiver capacitance

Capacitance to ground on each line

9.18

pF

I

Hi-Z State Data Line Leakage

0V < V

IN

 < 3.3V

- 10

+ 10

µA

R

EXT

Recommended External USB 
Series Resistor

In series with each USB pin with ±5%

27

Ω

Output Levels

V

OL

Low Level Output

Measured with R

L

 of 1.425 k

Ω tied to 

3.6V

0.0

0.3

V

V

OH

High Level Output

Measured with R

L

 of 14.25 k

Ω tied to 

GND

2.8

3.6

V

V

CRS

Output Signal Crossover 
Voltage

Measure conditions described in 

1.3

2.0

V

Pull-up and Pull-down Resistor

R

PUI

Bus Pull-up Resistor on 
Upstream Port (idle bus)

0.900

1.575

k

Ω

R

PUA

Bus Pull-up Resistor on 
Upstream Port (upstream port 
receiving)

1.425

3.090

k

Ω

R

PD

Bus Pull-down resistor

14.25

24.8

k

Ω

10

%

10

%

90

%

V

CRS

t

R

t

F

Differential
Data Lines

Rise Time

Fall Time

Fosc = 6 MHz/750 kHz

R

EXT

=27 ohms

C

load

Buffer

(b)

(a)

t

FR

Transition Rise Time

C

LOAD

 = 50 pF

4

20

ns

t

FE

Transition Fall Time

C

LOAD

 = 50 pF

4

20

ns

t

FRFM

Rise/Fall time Matching

90

111.11

%