SC3200 datasheet(419/447 Pages) AMD

419 / 447 page

AMD Geode™ SC3200 Processor Data Book

419

Electrical Specifications

Revision 5.1

tUSB_DJU22

Source differential driver jitter for paired

transactions

–150

150

9-38

Function (downstream),

Note 4

tUSB_SE2

Source EOP width

1.25

1.5

µs

9-39

Note 4, Note 5

tUSB_DE2

Differential to EOP transition skew

–40

100

9-39

Note 5

tUSB_RJD21

Receiver data jitter tolerance for con-

secutive transactions

–152

152

9-40

Host (upstream),

Note 4

tUSB_RJD22

Receiver data jitter tolerance for paired

transactions

–200

200

9-40

Host (upstream),

Note 4

tUSB_RJU21

Receiver data jitter tolerance for con-

secutive transactions

–75

9-40

Function (downstream),

Note 4

tUSB_RJU22

Receiver data jitter tolerance for paired

transactions

–45

9-40

Function (downstream),

Note 4

Low Speed Receiver EOP Width (Note 5)

tUSB_RE21

Must reject as EOP

330

9-38

tUSB_RE22

Must accept as EOP

675

9-38

Note 1. Unless otherwise specified, all timings use a 50 pF capacitive load (CL) to ground.

Note 2. Full-speed timing has a 1.5 K

Ω pull-up to 2.8 V on the DPOS_Port1,2,3 lines.

Note 3. Timing difference between the differential data signals (DPOS_PORT1,2,3 and DNEG_PORT1,2,3).

Note 4. Measured at the crossover point of differential data signals (DPOS_PORT1,2,3 and DNEG_PORT1,2,3).

Note 5. EOP is the End of Packet where DPOS_PORTt = DNEG_PORT = SE0. SE0 occurs when output level voltage

≤

VSE (Min).

Note 6. CL = 350 pF.

Table 9-28. USB Timing Parameters (Continued)

Symbol

Parameter

Min

Max

Unit

Figure

Comments

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