Single Versus Multiple Transaction Translator - AN1071
Last Updated: 04/28/2011
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Version: *A
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High-speed USB 2.0 hubs have a component to provide communication to full-speed and low-speed devices when the hub is operating at high-speed. This component is called a transaction tanslator (TT). The USB 2.0 specification allows two different implementations: one TT for all downstream ports (TT/hub) or one TT for each downstream port (TT/port). The TetraHub™ (CY7C65640B), which is a four-port high-speed hub, provides you with the option of using this part in a single TT (TT/Hub) or multiple TT (TT/Port) mode. This application note presents the differences and advantages of using multiple TT high-speed hubs versus a single TT high-speed hub.
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Spec No: 001-65252;
Sunset Owner: NMMA;
Secondary Owner: HBM;
Sunset Date: 06/14/11
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