Marvel Group Integrated Controller 88F6281 - Manual (Page 125)

Electrical Specifications
Differential Interface Electrical Characteristics
Copyright © 2008 Marvell Doc. No. MV-S104859-U0 Rev. E
December 2, 2008, Preliminary Document Classification: Proprietary Information Page 125
8.7.4 USB Electrical Characteristics
8.7.4.1 USB Driver and Receiver Characteristics
Table 69: USB Low Speed Driver and Receiver Characteristics
Min Max
Baud Rate BR Mbps -
Baud rate tolerance Bppm -15000.0 15000.0 ppm -
Ouput single ended high VOH 2.8 3.6 V 1
Ouput single ended low VOL 0.0 0.3 V 2
Output signal crossover voltage VCRS 1.3 2.0 V 3
Data fall time TLR 75.0 300.0 ns 3, 4
Data rise time TLF 75.0 300.0 ns 3, 4
Rise and fall time matching TLRFM 80.0 125.0 % -
Source jitter total: to next transition TUDJ1 -95.0 95.0 ns 5
Source jitter total: for paired transitions TUDJ2 -150.0 150.0 ns 5
Input single ended high VIH 2.0 - V -
Input single ended low VIL - 0.8 V -
Differential input sensitivity VDI 0.2 - V -
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.
Driver Parameters
Receiver Parameters
1.5
Notes Description Sym bol Units
Low Speed