Product manual

Spinpoint M9TU-USB 3.0 Product Manual REV 1.0

USB INTERFACE AND USB COMMANDS

6.2.2.6 High-speed (480Mb/s) Signaling Levels

The high-speed signaling voltage specifications in Table 6-2 must be met when measuring at the connector

closest to the transceiver, using precision 45Ω load resistors to the device ground as reference loads. All

voltage measurements are taken with respect to the local device ground.

Table 6-2: High-speed Signaling Levels

Note 1: Measured with a 45Ω resistor to ground at each data line, using test modes Test_J and Test_K

Note 2: A high-speed driver must never “intentionally” generate a signal in which both D+ and D- are driven to a level above

200mV. The current-steering design of a high-speed driver should naturally preclude this possibility.