AT43301 View Datasheet(PDF) - Atmel Corporation

Part Name

Description

Manufacturer

AT43301

Low-cost USB Hub Controller

Atmel Corporation 

AT43301

Table 3-9. DPx, DMx Hub Timings, Low-speed Operation

Symbol Parameter

tLHDD

tLHDJ1

tLHDJ2

tLUHJ1

tLUHJ2

tSOP

tLEOPD

tLHESK

Hub Differential Data Delay

Downstr Hub Diff Driver Jitter

To Next Transition, downst

For Paired Transitions, downst

To Next Transition, upstr

For Paired Transitions, upstr

Data Bit Width Distortion after SOP

Hub EOP Delay Relative to tHDD

Hub EOP Output Width Skew

Condition

Min

-45.0

-15.0

-45.0

-45.0

-60.0

0

-300.0

Max

Unit

300.0

ns

45.0

ns

15.0

ns

45.0

ns

45.0

ns

60.0

ns

200.0

ns

300.0

ns

Table 3-10. Hub Event Timings

Symbol Parameter

Condition

Min

Time to Detect a Downstream Port Connect Event

tDCNN

Awake Hub

2.5

Suspended Hub

2.5

Time to Detect a Disconnect Event on Downstream Port

tDDIS

Awake Hub

2.5

Suspended Hub

2.5

tURSM

Time from Detecting Downstream Resume to

Rebroadcast

tDRST

Duration of Driving Reset to a Downstream Device

Only for a SetPortFeature

(PORT_RESET) request

10.0

tURLK

Time to Detect a Long K from Upstream

2.5

tURLSEO Time to Detect a Long SEO from Upstream

2.5

tURPSEO Duration of repeating SEO Upstream

Max

Unit

2000.0

µs

12000.0

µs

2.5

µs

10000.0

µs

100.0

µs

20.0

100.0

10000.0

23

ms

µs

µs

FS bit

time

15

1137J–USB–01/06

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