Schnelle Erkennung des Endes einer USB2-Busrücksetzung für einen Eusb-Vorrichtungsrepeater
Anmelder: NXP USA, Inc. 🇺🇸
Details
- Veröffentlichungs-Nr.
- EP4764877
- Anmeldetag
- 17. November 2025
- Veröffentlichung
- 24. Juni 2026
- Rechtsraum
- EP
- IPC
- G06F13/40
Abstract
A USB-capable device includes an eUSB device repeater includes D+ and D- lines for communicating via a USB bus, and eD+ and eD- lines for communicating via an eUSB bus. The repeater includes a squelch detector for detecting a differential voltage between the D+ and D- lines and comparing it to a squelch threshold voltage based on a selectively variable squelch threshold voltage level at the squelch detector. During USB bus reset the squelch detector compares the differential voltage to a chirp-specific squelch threshold voltage level and the squelch signal indicates no K chirp or J chirp activity on the USB bus. The repeater thereby avoids false detections of invalid chirps and more reliably detects end of USB bus resets. A USB2 bus reset sequence windowing scheme is also provided.
Anmelder
- Firma
- NXP USA, Inc.
- Land
- 🇺🇸 USA
US-amerikanische Gesellschaft des Halbleiterkonzerns NXP, die Chips und Halbleiterlösungen für Automobiltechnik, Kommunikation und Industrieelektronik entwickelt.
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