STUSB1602 datasheet(10/55 Pages) STMICROELECTRONICS

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Inputs/outputs

STUSB1602

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DocID028319 Rev 2

2.3.11

SCLK

The serial clock signal from the STUSB1602 drives the SPI/MSP interface of the MCU and

the clock data on the MISO and MOSI pins.

2.3.12

A_B_SIDE

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

routing. The cable orientation is also provided by an internal I2C register. This signal is not

required in the case of USB 2.0 support.

2.3.13

VBUS_SENSE

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

VBUS on the USB Type-C receptacle side.

2.3.14

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 a 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.

2.3.15

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 a 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.

2.3.16

VREG1V2

This pin is used 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).

2.3.17

VSYS

This is the low power supply of 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.

2.3.18

VREG2V7

This pin is used 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 5. 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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