MV78200
Hardware Specifications
9.7.4
USB Interface Electrical Characteristics
9.7.4.1
USB Driver and Receiver Characteristics
Table 64: USB Low Speed Driver and Receiver Characteristics
Low Speed
Min Max
Description
Symbol
BR
Units
Mbps
ppm
Notes
Baud Rate
1.5
-
-
Baud rate tolerance
Bppm
-15000.0 15000.0
Driver Parameters
Ouput single ended high
Ouput single ended low
VOH
VOL
2.8
0.0
3.6
0.3
V
V
1
2
Output signal crossover voltage
Data fall time
VCRS
TLR
1.3
2.0
V
3
75.0
75.0
80.0
-95.0
-150.0
300.0
300.0
125.0
95.0
150.0
ns
ns
%
ns
ns
3, 4
3, 4
-
Data rise time
TLF
Rise and fall time matching
Source jitter total: to next transition
Source jitter total: for paired transitions
TLRFM
TUDJ1
5
TUDJ2
5
Receiver Parameters
Input single ended high
Input single ended low
Differential input sensitivity
VIH
VIL
VDI
2.0
-
-
0.8
-
V
V
V
-
-
-
0.2
Notes :
General Comment: For more information, refer to Universal Serial Bus Specification, Revision 2.0, April 2000.
General Comment: The load is 100 ohm differential for these parameters, unless otherw ise specified.
General Comment: To comply w ith the values presented in this table, refer to your local
Marvell representative for register settings.
1. Defined w ith 1.425 kilohm pull-up resistor to 3.6V.
2. Defined w ith 14.25 kilohm pull-dow n resistor to ground.
3. See "Data Signal Rise and Fall Time" w aveform.
4. Defined from 10% to 90% for rise time and 90% to 10% for fall time.
5. Including frequency tolerance. Timing difference betw een the differential data signals.
Defined at crossover point of differential data signals.
MV-S104671-U0 Rev. C
Page 116
Copyright © 2008 Marvell
Document Classification: Proprietary Information
December 6, 2008, Preliminary
MARVELL [ MARVELL TECHNOLOGY GROUP LTD. ]
