at43usb355 ATMEL Corporation, at43usb355 Datasheet - Page 105

• Manufacturer Part Number: at43usb355
• Description: At43usb355 Full-speed Usb Microcontroller With Embedded Hub, Adc And Pwm
• Manufacturer: ATMEL Corporation

2603G–USB–04/06
Figure 28. Synchronous Data Timing
Table 36. USB Driver Characteristics, Full Speed Operation
Note:
Figure 29. Full-speed Load
Symbol
TR
TF
TRFM
ZDRV
MOSI
MISO
SSN
SCK
1. With external 27Ω series resistor.
V
V
V
V
V
Parameter
Rise time
Fall time
TR/TF matching
Driver output resistance
V
V
V
OH
OL
IH
IH
IH
IL
IL
IL
t
CSS
HI-Z
t
SU
TxD+
TxD-
VALID IN
C
(1)
L
= 50 pF
t
WH
t
Condition
C
C
Steady state drive
H
L
L
= 50 pF
= 50 pF
R
R
S
S
t
WL
t
V
C
C
L
L
Min
t
90
28
H0
4
4
AT43USB355
t
CSH
Max
110
20
20
44
t
t
DIS
CS
HI-Z
Unit
ns
ns
%
Ω
105