82801BA Datasheet, PDF (452/498 Pages) Intel Corporation – Intel 82801BA I/O Controller Hub 2 (ICH2) and Intel 82801BAM I/O Controller Hub 2 Mobile

Electrical Characteristics
Table 16-12. Universal Serial Bus Timing
Sym
Parameter
Min Max
Full Speed Source (Note 7)
t100 USBPx+, USBPx- Driver Rise Time
t101 USBPx+, USBPx- Driver Fall Time
Source Differential Driver Jitter
t102 To Next Transition
For Paired Transitions
t103 Source EOP Width
t104 Differential to SE0 Transition Skew
Receiver Data Jitter Tolerance
t105 To Next Transition
For Paired Transitions
EOP Width: Must reject as EOP
t106
EOP Width: Must accept as EOP
t107 Differential to SE0 Transition Skew
4
20
4
20
-2
2
-1
1
160 175
-2
5
-20
20
-10
10
40
85
-2
5
Low Speed Source (Note 8)
t108 USBPx+, USBPx- Driver Rise Time
75
300
t109 USBPx+, USBPx- Driver Fall Time
Source Differential Driver Jitter
t110 To Next Transition
For Paired Transitions
t111 Source EOP Width
t112 Differential to SE0 Transition Skew
Receiver Data Jitter Tolerance
t113 To Next Transition
For Paired Transitions
t114
EOP Width: Must reject as EOP
EOP Width: Must accept as EOP
t115 Differential to SE0 Transition Skew
75
300
-2
2
-1
1
160 175
-2
5
-20
20
-10
10
40
85
-2
5
Units
Notes
Fig
ns 1, CL = 50 pF 16-14
ns 1, CL = 50 pF 16-14
ns 2, 3
ns
ns 4
ns 5
16-15
16-16
ns 3
ns
ns
ns
4
ns 5
16-15
16-16
ns
ns
1, 6
CL = 50 pF
CL = 350 pF
16-14
ns
ns
1,6
CL = 50 pF
CL = 350 pF
16-14
ns 2, 3
ns
ns 4
ns 5
16-15
16-16
ns 3
ns
ns
ns
4
ns 5
16-15
16-16
NOTES:
1. Driver output resistance under steady state drive is specified at 28 ohms at minimum and 43 ohms at
maximum
2. Timing difference between the differential data signals
3. Measured at crossover point of differential data signals
4. Measured at 50% swing point of data signals
5. Measured from last crossover point to 50% swing point of data line at leading edge of EOP
6. Measured from 10% to 90% of the data signal
7. Full Speed Data Rate has minimum of 11.97 Mbps and maximum of 12.03 Mbps
8. Low Speed Data Rate has a minimum of 1.48 Mbps and a maximum of 1.52 Mbps
16-12
82801BA ICH2 and 82801BAM ICH2-M Datasheet