9 Detailed Description
9.1 Overview
The TPS65982 is a fully-integrated USB Power Delivery (USB-PD) management device providing cable plug
and orientation detection for a USB Type-C and PD plug or receptacle. The TPS65982 communicates with
the cable and another USB Type-C and PD device at the opposite end of the cable, enables integrated port
power switches, controls an external high current port power switch, and multiplexes high-speed data to the
port for USB2.0 and supported Alternate Mode sideband information. The TPS65982 also controls an attached
super-speed multiplexer to simultaneously support USB3.0/3.1 data rates and DisplayPort video.
The TPS65982 is divided into six main sections: the USB-PD controller, the cable plug and orientation detection
circuitry, the port power switches, the port data multiplexer, the power management circuitry, and the digital core.
The USB-PD controller provides the physical layer (PHY) functionality of the USB-PD protocol. The USB-PD
data is output through either the C_CC1 pin or the C_CC2 pin, depending on the orientation of the reversible
USB Type-C cable. For a high-level block diagram of the USB-PD physical layer, a description of its features and
more detailed circuitry, refer to the USB-PD Physical Layer section.
The cable plug and orientation detection analog circuitry automatically detects a USB Type-C cable plug
insertion and also automatically detects the cable orientation. For a high-level block diagram of cable plug
and orientation detection, a description of its features and more detailed circuitry, refer to the Cable Plug and
Orientation Detection section.
The port power switches provide power to the system port through the VBUS pin and also through the C_CC1 or
C_CC2 pins based on the detected plug orientation. For a high-level block diagram of the port power switches, a
description of its features and more detailed circuitry, refer to the Port Power Switches section.
The port data multiplexer connects various input pairs to the system port through the C_USB_TP, C_USB_TN,
C_USB_BP, C_USB_BN, C_SBU1 and C_SBU2 pins. For a high-level block diagram of the port data
multiplexer, a description of its features and more detailed circuitry, refer to the USB Type-C Port Data
Multiplexer section.
The power management circuitry receives and provides power to the TPS65982 internal circuitry and to the
VOUT_3V3 and LDO_3V3 outputs. For a high-level block diagram of the power management circuitry, a
description of its features and more detailed circuitry, refer to the Power Management section.
The digital core provides the engine for receiving, processing, and sending all USB-PD packets as well as
handling control of all other TPS65982 functionality. A small portion of the digital core contains non-volatile
memory, called boot code, which is capable of initializing the TPS65982 and loading a larger, configurable
portion of application code into volatile memory in the digital core. For a high-level block diagram of the digital
core, a description of its features and more detailed circuitry, refer to the Digital Core section.
The digital core of the TPS65982 also interprets and uses information provided by the analog-to-digital converter
ADC (see the ADC section), is configurable to read the status of general purpose inputs and trigger events
accordingly, and controls general outputs which are configurable as push-pull or open-drain types with integrated
pullup or pulldown resistors and can operate tied to a 1.8 V or 3.3 V rail. The TPS65982 is an I
2
C slave to
be controlled by a host processor (see the I
2
C Slave Interface section), an SPI controller to write to and read
from an external flash memory (see the SPI Controller Interface section), and is programmed by a single-wire
debugger (SWD) connection (see the Single-Wire Debugger Interface section).
The TPS65982 also integrates a thermal shutdown mechanism (see Thermal Shutdown section) and runs off of
accurate clocks provided by the integrated oscillators (see the Oscillators section).
TPS65982
SLVSD02E – MARCH 2015 – REVISED AUGUST 2021
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