TUSB320 Datasheet, PDF (8/35 Pages) Texas Instruments – USB Type-C Configuration Channel Logic and Port Control

TUSB320, TUSB320I
SLLSEN9C – MAY 2015 – REVISED SEPTEMBER 2016
7 Detailed Description
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7.1 Overview
The USB Type-C ecosystem operates around a small form factor connector and cable that is flippable and
reversible. Because of the nature of the connector, a scheme is needed to determine the connector orientation.
Additional schemes are needed to determine when a USB port is attached and the acting role of the USB port
(DFP, UFP, DRP), as well as to communicate Type-C current capabilities. These schemes are implemented over
the CC pins according to the USB Type-C specifications. The TUSB320 device provides Configuration Channel
(CC) logic for determining USB port attach and detach, role detection, cable orientation, and Type-C current
mode. The TUSB320 device also contains several features such as mode configuration and low standby current
which make this device ideal for source or sinks in USB2.0 applications.
ADDR
PORT
3-State Buffer
Digital Controller
Connection and
cable detection
CC1
CC2
SDA/OUT1
SCL/OUT2
EN_N
I2C
CSR
CTRL_EN
EN_N Logic
Open Drain
Output
VBUS Detection
900 K ±1%
SYS_VBUS
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Figure 2. Functional Block Diagram of TUSB320
7.1.1 Cables, Adapters, and Direct Connect Devices
Type-C Specification 1.1 defines several cables, plugs and receptacles to be used to attach ports. The TUSB320
device supports all cables, receptacles, and plugs. The TUSB320 device does not support e-marking.
7.1.1.1 USB Type-C Receptacles and Plugs
Below is list of Type-C receptacles and plugs supported by the TUSB320 device:
• USB Type-C receptacle for USB2.0 platforms and devices
• USB full-featured Type-C plug
• USB2.0 Type-C plug
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