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TPS25810RVCR Datasheet(PDF) 11 Page - Texas Instruments |
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TPS25810RVCR Datasheet(HTML) 11 Page - Texas Instruments |
11 / 38 page 11 TPS25810 www.ti.com SLVSCR1B – SEPTEMBER 2015 – REVISED MAY 2016 Product Folder Links: TPS25810 Submit Documentation Feedback Copyright © 2015–2016, Texas Instruments Incorporated (1) This may be automatic or manually driven. 7 Detailed Description 7.1 Overview The TPS25810 is a highly integrated USB Type-C Downstream Facing Port (DFP) controller with built-in power switch developed for the new USB Type-C connector and cable. The part provides all functionality needed to support a USB Type C DFP in a system where USB power delivery (PD) source capabilities (for example, VBUS > 5 V) are not implemented. The device is designed to be compliant to Type-C spec revision 1.1. 7.1.1 USB Type C Basic For a detailed description of the Type-C spec refer to the USB-IF website to download the latest released version. Some of the basic concepts of the Type-C spec that pertains to understanding the operation of the TPS25810 (a DFP device) are described as follows. USB Type-C removes the need for different plug and receptacle types for host and device functionality. The Type-C receptacle replaces both Type-A and Type-B receptacle since the Type-C cable is plug-able in either direction between host and device. A host-to-device logical relationship is maintained via the configuration channel (CC). Optionally hosts and devices can be either providers or consumers of power when USB PD communication is used to swap roles. All USB Type-C ports operate in one of below three data modes: • Host mode: the port can only be host (provider of power) • Device mode: the port can only be device (consumer of power) • Dual-Role mode: the port can be either host or device Port types: • DFP (Downstream Facing Port): Host • UFP (Upstream Facing Port): Device • DRP (Dual-Role Port): Host or Device Valid DFP-to-UFP connections: • Table 1 describes valid DFP-to-UFP connections • Host to Host or Device to Device have no functions Table 1. DFP-to-UFP Connections HOST-MODE PORT DEVICE-MODE PORT DUAL-ROLE PORT Host-Mode Port No Function Works Works Device-Mode Port Works No Function Works Dual-Role Port Works Works Works(1) 7.1.2 Configuration Channel The function of the configuration channel is to detect connections and configure the interface across the USB Type-C cables and connectors. Functionally the Configuration Channel (CC) is used to serve the following purposes: • Detect connect to the USB ports • Resolve cable orientation and twist connections to establish USB data bus routing • Establish DFP and UFP roles between two connected ports • Discover and configure power: USB Type-C current modes or USB Power Delivery • Discovery and configure optional Alternate and Accessory modes • Enhances flexibility and ease of use Typical flow of DFP to UFP configuration is shown in Figure 11: |
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