at43usb355 ATMEL Corporation, at43usb355 Datasheet - Page 106

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

Table 38. USB Source Timings, Full-speed Operation
Note:
106
Symbol
TDRATE
TFRAME
TRFI
TRFIADJ
TDJ1
TDJ2
TFDEOP
TDEOP
TJR1
TJR2
TFEOPT
TFEOPR
TFST
1. With 6.000 MHz, 100 ppm crystal.
AT43USB355
Parameter
Full Speed Data Rate
Frame Interval
Consecutive Frame Interval Jitter
Consecutive Frame Interval Jitter
Source Diff Driver Jitter
To Next Transition
For Paired Transitions
Source Jitter for Differential Transition to
SEO Transitions
Differential to EOP Transition Skew
Receiver Data Jitter Tolerance
To Next Transition
For Paired Transitions
Source SEO interval of EOP
Receiver SEO interval of EOP
Width of SEO interval during differential
transition
(1)
Table 37. USB Driver Characteristics, Low-speed Operation
Figure 30. Low-speed Downstream Port Load
Symbol
TR
TF
TRFM
(1)
Parameter
Rise time
Fall time
TR/TF matching
(1)
(1)
TxD+
TxD-
C
Condition
Average Bit Rate
No clock adjustment
With clock adjustment
L
= 200 pF to 600 pF
Condition
CL = 200 - 600 pF
CL = 200 - 600 pF
R
R
S
S
C
C
L
L
0.9995
11.97
-18.5
Min
-3.5
160
82
-4
-2
-2
-9
3.6V
1.5 K Ohm
Min
75
75
80
1.0005
12.03
Max
18.5
126
175
3.5
42
14
4
5
5
9
Max
300
300
125
2603G–USB–04/06
Mb/s
Unit
ms
ns
ns
ns
ns
ns
ns
ns
ns
ns
Unit
ns
ns
%