SC2200 NSC [National Semiconductor], SC2200 Datasheet - Page 409

• Manufacturer Part Number: SC2200
• Description: Thin Client On a Chip
• Manufacturer: NSC [National Semiconductor]

Revision 3.0
Electrical Specifications
1.
2.
3.
4.
5.
6.
Symbol
t
t
t
t
t
t
t
Low Speed Receiver EOP Width
t
t
USB_DJU22
USB_SE2
USB_DE2
USB_RJD21
USB_RJD22
USB_RJU21
USB_RJU22
USB_RE21
USB_RE22
Unless otherwise specified, all timings use a 50 pF capacitive load (C
Full-speed timing has a 1.5 K pull-up to 2.8 V on the DPOS_Port1,2,3 lines.
Timing difference between the differential data signals (DPOS_PORT1,2,3 and DNEG_PORT1,2,3).
Measured at the crossover point of differential data signals (DPOS_PORT1,2,3 and DNEG_PORT1,2,3).
EOP is the End of Packet where DPOS_PORT
(Min).
C
L
= 350 pF.
Parameter
Source differential driver jitter
paired transactions
Source EOP width
Differential to EOP
Receiver Data Jitter Tolerance
consecutive transactions
Receiver Data Jitter Tolerance
paired transactions
Receiver Data Jitter Tolerance
consecutive transactions
Receiver Data Jitter Tolerance
paired transactions
Must reject as EOP
Must accept as EOP
Table 8-28. USB Timing Parameters (Continued)
4, 5
5
transition skew
5
(Continued)
4
4
4
4
4
for
for
for
for
for
t
= DNEG_PORT = SE0. SE0 occurs when output level voltage
–150
–152
–200
1.25
Min
–40
–75
–45
675
409
Max
150
100
152
200
330
1.5
75
45
L
) to ground.
Unit
ns
ns
ns
ns
ns
ns
ns
ns
s
Figure
8-38
8-39
8-39
8-40
8-40
8-40
8-40
8-38
8-38
Comments
Function (downstream)
Host (upstream)
Host (upstream)
Function (downstream)
Function (downstream)
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