Impedance of between 502B and EZ USB(device) PC (host) 502B EZ USB (device) GND connectorconnector connectorconnector connectorconnector connectorconnector.

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Presentation transcript:

Impedance of between 502B and EZ USB(device) PC (host) 502B EZ USB (device) GND connectorconnector connectorconnector connectorconnector connectorconnector USB3.0 CABLE USB2.0 CABLE DM DP VBUS It remains Rx Detect Device Tx1+ Device Rx2+ Device Tx1- Device Rx2- Host Rx1+ Host Tx2+ Host Rx1- Host Tx2- 3.3V Although the impedance is 83kohm, EZ-USB changed SuperSpeed. Rx Detect Impedance 83kohm

Measurement point Connection between PC(host),502B and EZ USB(device) PC (host) 502B EZ USB (device) GND connectorconnector connectorconnector connectorconnector connectorconnector USB3.0 CABLE USB2.0 CABLE DM DP VBUS Redriver is used for self powered and same as EZ USB. If it was connected directly, USB2.0 was not identified. Although PC was not connected to USB3.0, it was established Rx termination at Device Rx side. please see next page Device Tx1+ Device Rx2+ Device Tx1- Device Rx2- Host Rx1+ Host Tx2+ Host Rx1- Host Tx2- 3.3V

Waveform of Device Rx pin at powering up 100ns/div100us/div100ms/div