usb一致性测试软件,USB2.0一致性测试 Step by Step.pdf

USB2.0一致性测试 Step by Step

USB2USB2.00

Step by Step

1

USB2.0

D+,D-,VBUS,GND)

USB2.0

1.5Mbps 75- 300ns

12Mbps 4-20ns

480Mbps480Mbps 500ps500ps

2

USBUSB-IFIFUSB2.0USB2.0

3

USB2.0USB2.0

4

USB2.0USB2.0

USB 2.0 Speed Test items Host Device Hub

HSHS FEFE SQSQ √√ √√

Devices NE SQ √ √

Hubs Upstream SQ √

Hosts Downstream SQQ √√

Packet Parameters √ √ √

USB-IF USB2.0 HS Chirp Timing √ √ √

Suspend Resume √ √ √

Disconnect √√ √√

Downstream Repeater √

Downstream Jitter √

USB2USB2.00 UpstreamUpstream RepeaterRepeater √√

USB-IF FS Downstream SQ √ √

Upstream SQ √ √

LS Downstream SQ √ √

Upstream SQ √ √

In Rush Current √