The TUSB564 supports USB 3.1 Gen 1 datarates up to 5 Gbps. The TUSB564 supports all the USB defined power states (U0, U1, U2, and U3). Because the TUSB564 is a linear redriver, it can’t decode USB3.1 physical layer traffic. The TUSB564 monitors the actual physical layer conditions like receiver termination, electrical idle, LFPS, and SuperSpeed signaling rate to determine the USB power state of the USB 3.1 interface.

The TUSB564 features an intelligent low frequency periodic signaling (LFPS) detector. The LFPS detector automatically senses the low frequency signals and disables receiver equalization functionality. When not receiving LFPS, the TUSB564 enables receiver equalization based on the EQ[1:0] and SSEQ[1:0] pins or values programmed into EQ1_SEL, EQ2_SEL, and SSEQ_SEL registers.