STUSB1600 datasheet(11/69 Pages) STMICROELECTRONICS

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STUSB1600

Inputs/outputs

2.3.10

A_B_SIDE

This output pin provides cable orientation. It is used to establish USB SuperSpeed signal

routing. The cable orientation is also advertised in a dedicated I2C register bit (see

Section 5.1: Register description). This signal is not required in case of USB 2.0 support.

2.3.11

VBUS_SENSE

This input pin is used to sense VBUS presence, monitor VBUS voltage, and discharge VBUS

on the USB Type-C receptacle side.

2.3.12

VBUS_EN_SNK

In sink power role, this pin allows the incoming VBUS power to be enabled when the

connection to a source is established and VBUS is in the valid operating range. The open

drain output allows a PMOS transistor to be directly driven. The logic value of the pin is also

advertised in a dedicated I2C register bit (see Section 5.1: Register description).

2.3.13

VBUS_EN_SRC

In source power role, this pin allows the outgoing VBUS power to be enabled when the

connection to a sink is established and VBUS is in the valid operating range. The open drain

output allows a PMOS transistor to be directly driven. The logic value of the pin is also

advertised in a dedicated I2C register bit (see Section 5.1: Register description).

2.3.14

VREG1V2

This pin is used only for external decoupling of the 1.2 V internal regulator. The

recommended decoupling capacitor is: 1 µF typ. (0.5 µF min, 10 µF max).

2.3.15

VSYS

This is the low power supply from the system, if there is any. It can be connected directly to

a single cell Lithium battery or to the system power supply delivering 3.3 V or 5 V. It is

recommended to connect this pin to ground when it is not used.

2.3.16

VREG2V7

This pin is used only for external decoupling of the 2.7 V internal regulator. The

recommended decoupling capacitor is: 1 µF typ. (0.5 µF min, 10 µF max).

Table 6. USB data mux select

Value

CC pin position

HiZ

CC1 pin is attached to CC line

CC2 pin is attached to CC line

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