at91rm3400 ATMEL Corporation, at91rm3400 Datasheet - Page 437

• Manufacturer Part Number: at91rm3400
• Description: Atmel Advanced At91 Arm Microcontroller
• Manufacturer: ATMEL Corporation

Switching Characteristics
Table 83. In Low Speed
Table 84. In Full Speed
Figure 177. USB Data Signal Rise and Fall Times
1790A–ATARM–11/03
Symbol
t
t
t
Symbol
t
t
t
FR
FE
FRFM
FR
FE
FRFM
Parameter
Transition Rise Time
Transition Fall Time
Rise/Fall Time Matching
Parameter
Transition Rise Time
Transition Fall Time
Rise/Fall Time Matching
Differential
Data Lines
V
CRS
Fosc = 6MHz/750kHz
10%
Rise Time
t
R
Conditions
C
C
C
Conditions
C
C
LOAD
LOAD
LOAD
LOAD
LOAD
= 400 pF
= 400 pF
= 400 pF
= 50 pF
= 50 pF
Buffer
90%
(a)
(b)
R
EXT
=27 ohms
Fall Time
C
load
t
F
10%
Min
Min
75
75
80
90
4
4
Typ
Typ
AT91RM3400
111.11
Max
Max
300
300
125
20
20
Unit
Unit
ns
ns
%
ns
ns
%
437